{"id":1775,"date":"2025-03-24T08:49:56","date_gmt":"2025-03-23T23:49:56","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1775"},"modified":"2025-03-24T08:49:56","modified_gmt":"2025-03-23T23:49:56","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91c%e3%81%aefor%e6%96%87%e3%82%92%e4%bd%bf%e3%81%84%e3%81%93%e3%81%aa%e3%81%997%e3%81%a4%e3%81%ae%e3%83%86%e3%82%af%e3%83%8b%e3%83%83","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1775","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011C++\u306efor\u6587\u3092\u4f7f\u3044\u3053\u306a\u30597\u3064\u306e\u30c6\u30af\u30cb\u30c3\u30af &#8211; \u73fe\u5834\u3067\u4f7f\u3048\u308b\u5b9f\u8df5\u7684\u306a\u4f8b\u4ed8\u304d"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">C++\u306efor\u6587\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u5f93\u6765\u306efor\u6587\u306e\u69cb\u6587\u3068\u52d5\u4f5c\u539f\u7406<\/a>      <\/li>      <li>        <a href=\"#i-2\">\u7bc4\u56f2\u30d9\u30fc\u30b9for\u6587\u306e\u7279\u5fb4\u3068\u5229\u70b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">\u521d\u671f\u5316\u30fb\u6761\u4ef6\u30fb\u66f4\u65b0\u90e8\u5206\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">for\u6587\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u914d\u5217\u64cd\u4f5c\u3067\u306e\u52b9\u7387\u7684\u306afor\u6587\u306e\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30f3\u30c6\u30ca\u306e\u8d70\u67fb\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u30cd\u30b9\u30c8\u3057\u305ffor\u6587\u3067\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">\u30e2\u30c0\u30f3C++\u306b\u304a\u3051\u308bfor\u6587\u306e\u9032\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">C++11\u4ee5\u964d\u3067\u8ffd\u52a0\u3055\u308c\u305f\u6a5f\u80fd\u3068\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u30e9\u30e0\u30c0\u5f0f\u3068for_each\u306e\u7d44\u307f\u5408\u308f\u305b\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u4e26\u5217\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u306efor\u6587\u306e\u5fdc\u7528<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">for\u6587\u306e\u843d\u3068\u3057\u7a74\u3068\u5bfe\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u3068\u30c7\u30d0\u30c3\u30b0\u306e\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-16\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308bfor\u6587\u6d3b\u7528\u4e8b\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u5b89\u5168\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305ffor\u6587\u306e\u8a2d\u8a08<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-20\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308bfor\u6587\u6d3b\u7528\u4e8b\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-22\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u5b89\u5168\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305ffor\u6587\u306e\u8a2d\u8a08<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">C++\u306efor\u6587\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u5f93\u6765\u306efor\u6587\u306e\u69cb\u6587\u3068\u52d5\u4f5c\u539f\u7406<\/h3>\n\n\n\n<p>C++\u306e\u5f93\u6765\u306efor\u6587\u306f\u3001\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306e\u57fa\u672c\u7684\u306a\u5236\u5fa1\u69cb\u6587\u3067\u3059\u3002\u305d\u306e\u57fa\u672c\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">for (\u521d\u671f\u5316\u5f0f; \u6761\u4ef6\u5f0f; \u66f4\u65b0\u5f0f) {\n    \/\/ \u7e70\u308a\u8fd4\u3057\u5b9f\u884c\u3059\u308b\u51e6\u7406\n}<\/pre>\n\n\n\n<p>\u5b9f\u969b\u306e\u4f7f\u7528\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306afor\u6587\u306e\u4f8b\nfor (int i = 0; i &lt; 5; i++) {\n    std::cout &lt;&lt; i &lt;&lt; \" \";  \/\/ \u51fa\u529b: 0 1 2 3 4\n}\n\n\/\/ \u8907\u6570\u306e\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u4f8b\nfor (int i = 0, j = 10; i &lt; 5; i++, j--) {\n    std::cout &lt;&lt; \"i: \" &lt;&lt; i &lt;&lt; \", j: \" &lt;&lt; j &lt;&lt; std::endl;\n}\n\n\/\/ \u6761\u4ef6\u5f0f\u306e\u307f\u3092\u4f7f\u7528\u3059\u308b\u4f8b\uff08while\u6587\u306e\u3088\u3046\u306a\u4f7f\u3044\u65b9\uff09\nint k = 0;\nfor (; k &lt; 5;) {\n    std::cout &lt;&lt; k &lt;&lt; \" \";\n    k++;\n}<\/pre>\n\n\n\n<p>\u5404\u90e8\u5206\u306e\u5f79\u5272\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u5f0f<\/strong>: \u30eb\u30fc\u30d7\u958b\u59cb\u524d\u306b1\u56de\u3060\u3051\u5b9f\u884c<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5909\u6570\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u8907\u6570\u306e\u521d\u671f\u5316\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u7701\u7565\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6761\u4ef6\u5f0f<\/strong>: \u5404\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u958b\u59cb\u6642\u306b\u8a55\u4fa1<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>true \u306e\u5834\u5408\u3001\u30eb\u30fc\u30d7\u672c\u4f53\u3092\u5b9f\u884c<\/li>\n\n\n\n<li>false \u306e\u5834\u5408\u3001\u30eb\u30fc\u30d7\u3092\u7d42\u4e86<\/li>\n\n\n\n<li>\u7701\u7565\u3059\u308b\u3068\u5e38\u306btrue\uff08\u7121\u9650\u30eb\u30fc\u30d7\uff09<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u66f4\u65b0\u5f0f<\/strong>: \u5404\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u7d42\u4e86\u6642\u306b\u5b9f\u884c<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ab\u30a6\u30f3\u30bf\u306e\u5897\u6e1b\u3084\u305d\u306e\u4ed6\u306e\u66f4\u65b0\u51e6\u7406<\/li>\n\n\n\n<li>\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u8907\u6570\u306e\u66f4\u65b0\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u7701\u7565\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u7bc4\u56f2\u30d9\u30fc\u30b9for\u6587\u306e\u7279\u5fb4\u3068\u5229\u70b9<\/h3>\n\n\n\n<p>C++11\u3067\u5c0e\u5165\u3055\u308c\u305f\u7bc4\u56f2\u30d9\u30fc\u30b9for\u6587\uff08range-based for\uff09\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u8981\u7d20\u3092\u7c21\u6f54\u306b\u8d70\u67fb\u3067\u304d\u308b\u73fe\u4ee3\u7684\u306a\u69cb\u6587\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30d9\u30af\u30bf\u30fc\u306e\u5168\u8981\u7d20\u3092\u8d70\u67fb\nstd::vector&lt;int&gt; numbers = {1, 2, 3, 4, 5};\nfor (const auto&amp; num : numbers) {\n    std::cout &lt;&lt; num &lt;&lt; \" \";\n}\n\n\/\/ \u914d\u5217\u306e\u8d70\u67fb\nint arr[] = {1, 2, 3, 4, 5};\nfor (auto element : arr) {\n    std::cout &lt;&lt; element &lt;&lt; \" \";\n}\n\n\/\/ \u6587\u5b57\u5217\u306e\u8d70\u67fb\nstd::string text = \"Hello\";\nfor (char c : text) {\n    std::cout &lt;&lt; c &lt;&lt; \" \";\n}<\/pre>\n\n\n\n<p>\u7bc4\u56f2\u30d9\u30fc\u30b9for\u6587\u306e\u5229\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b7\u30f3\u30d7\u30eb\u306a\u69cb\u6587<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u7ba1\u7406\u304c\u4e0d\u8981<\/li>\n\n\n\n<li>\u5883\u754c\u30c1\u30a7\u30c3\u30af\u304c\u81ea\u52d5\u7684\u306b\u884c\u308f\u308c\u308b<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b89\u5168\u6027\u306e\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7bc4\u56f2\u5916\u30a2\u30af\u30bb\u30b9\u306e\u30ea\u30b9\u30af\u304c\u4f4e\u6e1b<\/li>\n\n\n\n<li>\u8981\u7d20\u6570\u306e\u8a08\u7b97\u30df\u30b9\u3092\u9632\u6b62<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u6700\u9069\u5316\u3057\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u53c2\u7167\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u3092\u56de\u907f<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u521d\u671f\u5316\u30fb\u6761\u4ef6\u30fb\u66f4\u65b0\u90e8\u5206\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044for\u6587\u3092\u66f8\u304f\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Good: \u30eb\u30fc\u30d7\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u5236\u9650\nfor (int i = 0; i &lt; 10; i++) {\n    \/\/ i \u306f\u3053\u306e\u30d6\u30ed\u30c3\u30af\u5185\u3067\u306e\u307f\u6709\u52b9\n}\n\n\/\/ Bad: \u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u6570\u3092\u4f7f\u7528\nint i;\nfor (i = 0; i &lt; 10; i++) {\n    \/\/ i \u306f\u30eb\u30fc\u30d7\u5916\u3067\u3082\u4f7f\u7528\u53ef\u80fd\uff08\u30b9\u30b3\u30fc\u30d7\u304c\u5e83\u3059\u304e\u308b\uff09\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u52b9\u7387\u7684\u306a\u30eb\u30fc\u30d7\u6761\u4ef6<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; vec = {1, 2, 3, 4, 5};\n\n\/\/ Good: \u30b5\u30a4\u30ba\u3092\u4e8b\u524d\u306b\u53d6\u5f97\nfor (size_t i = 0, size = vec.size(); i &lt; size; i++) {\n    \/\/ vec.size()\u306e\u547c\u3073\u51fa\u3057\u304c1\u56de\u3067\u6e08\u3080\n}\n\n\/\/ Bad: \u6bce\u56de\u30b5\u30a4\u30ba\u3092\u8a08\u7b97\nfor (size_t i = 0; i &lt; vec.size(); i++) {\n    \/\/ \u6bce\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u3067vec.size()\u3092\u547c\u3073\u51fa\u3059\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u9069\u5207\u306a\u66f4\u65b0\u5f0f\u306e\u9078\u629e<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Good: \u660e\u793a\u7684\u306a\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\nfor (int i = 0; i &lt; 10; ++i) {\n    \/\/ \u524d\u7f6e\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\uff08\u308f\u305a\u304b\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a\u306e\u53ef\u80fd\u6027\uff09\n}\n\n\/\/ Good: \u30b9\u30c6\u30c3\u30d7\u5024\u306e\u660e\u793a\nfor (int i = 0; i &lt; 100; i += 2) {\n    \/\/ 2\u305a\u3064\u5897\u52a0\uff08\u610f\u56f3\u304c\u660e\u78ba\uff09\n}<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u7bc4\u56f2\u30d9\u30fc\u30b9for\u6587\u3067\u306e\u53c2\u7167\u4f7f\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;std::string&gt; words = {\"Hello\", \"World\"};\n\n\/\/ Good: const\u53c2\u7167\u3092\u4f7f\u7528\uff08\u30b3\u30d4\u30fc\u3092\u907f\u3051\u308b\uff09\nfor (const auto&amp; word : words) {\n    std::cout &lt;&lt; word &lt;&lt; \" \";\n}\n\n\/\/ Bad: \u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u304c\u767a\u751f\nfor (auto word : words) {\n    std::cout &lt;&lt; word &lt;&lt; \" \";\n}<\/pre>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u5f0f\u3067\u306e\u8907\u6570\u5909\u6570\u306e\u9069\u5207\u306a\u4f7f\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Good: \u95a2\u9023\u3059\u308b\u5909\u6570\u3092\u307e\u3068\u3081\u3066\u521d\u671f\u5316\nfor (int i = 0, j = 10; i &lt; 5; i++, j--) {\n    std::cout &lt;&lt; \"i + j = \" &lt;&lt; (i + j) &lt;&lt; std::endl;\n}\n\n\/\/ Bad: \u8907\u96d1\u3059\u304e\u308b\u521d\u671f\u5316\nfor (int i = 0, j = 10, k = 20, l = 30; i &lt; 5; i++, j--, k += 2, l -= 3) {\n    \/\/ \u7406\u89e3\u3068\u4fdd\u5b88\u304c\u56f0\u96e3\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u539f\u5247\u306b\u5f93\u3046\u3053\u3068\u3067\u9577\u671f\u7684\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">for\u6587\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u914d\u5217\u64cd\u4f5c\u3067\u306e\u52b9\u7387\u7684\u306afor\u6587\u306e\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u306f\u958b\u767a\u73fe\u5834\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u51e6\u7406\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u52b9\u7387\u7684\u306a\u914d\u5217\u64cd\u4f5c\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u56fa\u5b9a\u9577\u914d\u5217\u306e\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u914d\u5217\u64cd\u4f5c\nint arr[5] = {1, 2, 3, 4, 5};\n\n\/\/ Good: \u914d\u5217\u30b5\u30a4\u30ba\u3092\u5b9a\u6570\u3067\u4fdd\u6301\nconst size_t arr_size = sizeof(arr) \/ sizeof(arr[0]);\nfor (size_t i = 0; i &lt; arr_size; ++i) {\n    arr[i] *= 2;  \/\/ \u5404\u8981\u7d20\u30922\u500d\u306b\n}\n\n\/\/ Better: C++17\u4ee5\u964d\u3067\u306f\u69cb\u9020\u5316\u675f\u7e1b\u3092\u6d3b\u7528\nfor (size_t i = 0; const auto&amp; element : arr) {\n    std::cout &lt;&lt; \"Index \" &lt;&lt; i++ &lt;&lt; \": \" &lt;&lt; element &lt;&lt; '\\n';\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u52d5\u7684\u914d\u5217\uff08std::vector\uff09\u306e\u52b9\u7387\u7684\u306a\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; vec = {1, 2, 3, 4, 5};\n\n\/\/ \u30e1\u30e2\u30ea\u4e88\u7d04\u306b\u3088\u308b\u52b9\u7387\u5316\nvec.reserve(1000);  \/\/ \u8ffd\u52a0\u64cd\u4f5c\u524d\u306b\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\nfor (int i = 6; i &lt;= 1000; ++i) {\n    vec.push_back(i);  \/\/ \u518d\u5272\u308a\u5f53\u3066\u304c\u767a\u751f\u3057\u306a\u3044\n}\n\n\/\/ \u8981\u7d20\u306e\u524a\u9664\u3092\u4f34\u3046\u64cd\u4f5c\nfor (auto it = vec.begin(); it != vec.end();) {\n    if (*it % 2 == 0) {  \/\/ \u5076\u6570\u3092\u524a\u9664\n        it = vec.erase(it);  \/\/ erase\u306f\u6b21\u306e\u8981\u7d20\u3092\u6307\u3059\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u8fd4\u3059\n    } else {\n        ++it;\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u591a\u6b21\u5143\u914d\u5217\u306e\u52b9\u7387\u7684\u306a\u8d70\u67fb<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 2\u6b21\u5143\u914d\u5217\u306e\u52b9\u7387\u7684\u306a\u8d70\u67fb\nconst int rows = 3, cols = 4;\nint matrix[rows][cols] = {{1, 2, 3, 4},\n                         {5, 6, 7, 8},\n                         {9, 10, 11, 12}};\n\n\/\/ Good: \u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u8d70\u67fb\uff08\u884c\u512a\u5148\uff09\nfor (int i = 0; i &lt; rows; ++i) {\n    for (int j = 0; j &lt; cols; ++j) {\n        std::cout &lt;&lt; matrix[i][j] &lt;&lt; ' ';\n    }\n}\n\n\/\/ Bad: \u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u306e\u60aa\u3044\u8d70\u67fb\uff08\u5217\u512a\u5148\uff09\nfor (int j = 0; j &lt; cols; ++j) {\n    for (int i = 0; i &lt; rows; ++i) {\n        std::cout &lt;&lt; matrix[i][j] &lt;&lt; ' ';\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30f3\u30c6\u30ca\u306e\u8d70\u67fb\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>STL\u30b3\u30f3\u30c6\u30ca\u3092\u52b9\u7387\u7684\u306b\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u6cd5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; numbers = {1, 2, 3, 4, 5};\n\n\/\/ \u901a\u5e38\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u8d70\u67fb\nfor (auto it = numbers.begin(); it != numbers.end(); ++it) {\n    *it *= 2;  \/\/ \u5404\u8981\u7d20\u30922\u500d\u306b\n}\n\n\/\/ \u9006\u9806\u8d70\u67fb\nfor (auto rit = numbers.rbegin(); rit != numbers.rend(); ++rit) {\n    std::cout &lt;&lt; *rit &lt;&lt; ' ';  \/\/ \u9006\u9806\u306b\u51fa\u529b\n}\n\n\/\/ \u7279\u5b9a\u7bc4\u56f2\u306e\u8d70\u67fb\nauto start = std::next(numbers.begin(), 1);  \/\/ 2\u756a\u76ee\u306e\u8981\u7d20\u304b\u3089\nauto end = std::prev(numbers.end(), 1);      \/\/ \u6700\u5f8c\u306e\u4e00\u3064\u524d\u307e\u3067\nfor (auto it = start; it != end; ++it) {\n    std::cout &lt;&lt; *it &lt;&lt; ' ';\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30b3\u30f3\u30c6\u30ca\u56fa\u6709\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ std::map\u3067\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u6d3b\u7528\nstd::map&lt;std::string, int&gt; scores = {\n    {\"Alice\", 90}, {\"Bob\", 85}, {\"Charlie\", 95}\n};\n\n\/\/ map\u306e\u52b9\u7387\u7684\u306a\u8d70\u67fb\nfor (auto it = scores.begin(); it != scores.end(); ++it) {\n    std::cout &lt;&lt; it-&gt;first &lt;&lt; \": \" &lt;&lt; it-&gt;second &lt;&lt; '\\n';\n}\n\n\/\/ \u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u306e\u524a\u9664\nfor (auto it = scores.begin(); it != scores.end();) {\n    if (it-&gt;second &lt; 90) {\n        it = scores.erase(it);  \/\/ 90\u70b9\u672a\u6e80\u3092\u524a\u9664\n    } else {\n        ++it;\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30a4\u30c6\u30ec\u30fc\u30bf\u3068\u5404\u7a2e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u7d44\u307f\u5408\u308f\u305b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; data = {3, 1, 4, 1, 5, 9, 2, 6, 5, 3};\n\n\/\/ \u90e8\u5206\u30bd\u30fc\u30c8\nauto middle = data.begin() + data.size() \/ 2;\nstd::partial_sort(data.begin(), middle, data.end());\n\n\/\/ \u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u306e\u691c\u7d22\nauto it = std::find_if(data.begin(), data.end(),\n    [](int n) { return n &gt; 5; });\n\n\/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u7bc4\u56f2\u3067\u306e\u6f14\u7b97\nint sum = 0;\nfor (auto it = data.begin(); it != data.end(); ++it) {\n    sum += *it;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30cd\u30b9\u30c8\u3057\u305ffor\u6587\u3067\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u30cd\u30b9\u30c8\u3057\u305f\u30eb\u30fc\u30d7\u306f\u8a08\u7b97\u91cf\u304c\u5897\u5927\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u304c\u7279\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30eb\u30fc\u30d7\u5909\u6570\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">const int size = 1000;\nstd::vector&lt;std::vector&lt;int&gt;&gt; matrix(size, std::vector&lt;int&gt;(size));\n\n\/\/ Good: \u30eb\u30fc\u30d7\u4e0d\u5909\u306e\u8a08\u7b97\u3092\u5916\u90e8\u3067\u5b9f\u884c\nconst size_t matrix_size = matrix.size();\nfor (size_t i = 0; i &lt; matrix_size; ++i) {\n    const size_t row_size = matrix[i].size();\n    for (size_t j = 0; j &lt; row_size; ++j) {\n        matrix[i][j] = i + j;\n    }\n}\n\n\/\/ Bad: \u6bce\u56de\u30b5\u30a4\u30ba\u3092\u8a08\u7b97\nfor (size_t i = 0; i &lt; matrix.size(); ++i) {\n    for (size_t j = 0; j &lt; matrix[i].size(); ++j) {\n        matrix[i][j] = i + j;\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u5b9f\u88c5\nconst int block_size = 32;\nfor (int i = 0; i &lt; size; i += block_size) {\n    for (int j = 0; j &lt; size; j += block_size) {\n        \/\/ \u30d6\u30ed\u30c3\u30af\u5185\u306e\u51e6\u7406\n        for (int bi = i; bi &lt; std::min(i + block_size, size); ++bi) {\n            for (int bj = j; bj &lt; std::min(j + block_size, size); ++bj) {\n                matrix[bi][bj] = bi + bj;\n            }\n        }\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u65e9\u671f\u7d42\u4e86\u6761\u4ef6\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u6761\u4ef6\u3092\u6e80\u305f\u3057\u305f\u3089\u65e9\u671f\u7d42\u4e86\nbool findElement(const std::vector&lt;std::vector&lt;int&gt;&gt;&amp; matrix, int target) {\n    for (const auto&amp; row : matrix) {\n        for (const auto&amp; element : row) {\n            if (element == target) {\n                return true;  \/\/ \u8981\u7d20\u304c\u898b\u3064\u304b\u3063\u305f\u3089\u5373\u5ea7\u306b\u7d42\u4e86\n            }\n        }\n    }\n    return false;\n}\n\n\/\/ \u4e0d\u8981\u306a\u53cd\u5fa9\u3092\u907f\u3051\u308b\nbool isUpperTriangular(const std::vector&lt;std::vector&lt;double&gt;&gt;&amp; matrix) {\n    for (size_t i = 1; i &lt; matrix.size(); ++i) {\n        for (size_t j = 0; j &lt; i; ++j) {  \/\/ \u4e0b\u4e09\u89d2\u90e8\u5206\u306e\u307f\u30c1\u30a7\u30c3\u30af\n            if (matrix[i][j] != 0.0) {\n                return false;\n            }\n        }\n    }\n    return true;\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6280\u8853\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">\u30e2\u30c0\u30f3C++\u306b\u304a\u3051\u308bfor\u6587\u306e\u9032\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">C++11\u4ee5\u964d\u3067\u8ffd\u52a0\u3055\u308c\u305f\u6a5f\u80fd\u3068\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>C++11\u4ee5\u964d\u3001for\u6587\u306f\u5927\u304d\u304f\u9032\u5316\u3057\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u52b9\u7387\u7684\u306a\u8a18\u8ff0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u5f0f\u3092\u6301\u3064range-based for\u6587\uff08C++20\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; createVector() {\n    return {1, 2, 3, 4, 5};\n}\n\n\/\/ C++20: \u521d\u671f\u5316\u5f0f\u4ed8\u304drange-based for\nfor (auto vec = createVector(); const auto&amp; elem : vec) {\n    std::cout &lt;&lt; elem &lt;&lt; ' ';\n}\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4ed8\u304drange-based for\nfor (std::vector&lt;int&gt; vec = {1, 2, 3}; auto [i, elem] : std::views::enumerate(vec)) {\n    std::cout &lt;&lt; i &lt;&lt; \": \" &lt;&lt; elem &lt;&lt; '\\n';\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u69cb\u9020\u5316\u675f\u7e1b\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\uff08C++17\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::map&lt;std::string, int&gt; scores = {\n    {\"Alice\", 90}, {\"Bob\", 85}, {\"Charlie\", 95}\n};\n\n\/\/ \u69cb\u9020\u5316\u675f\u7e1b\u3092\u4f7f\u7528\u3057\u305f\u30de\u30c3\u30d7\u306e\u8d70\u67fb\nfor (const auto&amp; [name, score] : scores) {\n    std::cout &lt;&lt; name &lt;&lt; \" scored \" &lt;&lt; score &lt;&lt; \" points\\n\";\n}\n\n\/\/ \u30cd\u30b9\u30c8\u3055\u308c\u305f\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u8d70\u67fb\nstd::vector&lt;std::pair&lt;std::string, std::vector&lt;int&gt;&gt;&gt; students = {\n    {\"Alice\", {90, 85, 95}},\n    {\"Bob\", {85, 90, 80}}\n};\n\nfor (const auto&amp; [name, grades] : students) {\n    double average = 0.0;\n    for (const auto&amp; grade : grades) {\n        average += grade;\n    }\n    average \/= grades.size();\n    std::cout &lt;&lt; name &lt;&lt; \"'s average: \" &lt;&lt; average &lt;&lt; '\\n';\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>constexpr for\u30eb\u30fc\u30d7\uff08C++20\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u8a08\u7b97\nconstexpr auto calculateFactorial(int n) {\n    int result = 1;\n    for (int i = 1; i &lt;= n; ++i) {\n        result *= i;\n    }\n    return result;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nconstexpr auto factorial_5 = calculateFactorial(5);\nstatic_assert(factorial_5 == 120);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30e9\u30e0\u30c0\u5f0f\u3068for_each\u306e\u7d44\u307f\u5408\u308f\u305b\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u30e9\u30e0\u30c0\u5f0f\u3068for_each\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308a\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u67d4\u8edf\u306a\u53cd\u5fa9\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u57fa\u672c\u7684\u306afor_each\u3068\u30e9\u30e0\u30c0\u306e\u4f7f\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; numbers = {1, 2, 3, 4, 5};\n\n\/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u6cd5\nstd::for_each(numbers.begin(), numbers.end(), \n    [](int&amp; n) { n *= 2; });\n\n\/\/ \u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u4f7f\u7528\u3057\u305f\u4f8b\nint sum = 0;\nstd::for_each(numbers.begin(), numbers.end(),\n    [&amp;sum](int n) { sum += n; });\n\n\/\/ \u30e1\u30f3\u30d0\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u4f8b\nstd::vector&lt;std::string&gt; words = {\"hello\", \"world\"};\nstd::for_each(words.begin(), words.end(),\n    [](std::string&amp; s) { s[0] = std::toupper(s[0]); });<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u9ad8\u5ea6\u306a\u30e9\u30e0\u30c0\u5f0f\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u72b6\u614b\u3092\u6301\u3064\u30e9\u30e0\u30c0\u5f0f\nauto generateSequence = [n = 0]() mutable { return ++n; };\nstd::vector&lt;int&gt; sequence(5);\nstd::generate(sequence.begin(), sequence.end(), generateSequence);\n\n\/\/ \u8907\u6570\u306e\u6761\u4ef6\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u51e6\u7406\nstd::vector&lt;int&gt; values = {1, -2, 3, -4, 5};\nstd::for_each(values.begin(), values.end(),\n    [total = 0](int&amp; v) mutable {\n        if (v &lt; 0) {\n            v = std::abs(v);\n        }\n        total += v;\n        std::cout &lt;&lt; \"Running total: \" &lt;&lt; total &lt;&lt; '\\n';\n    });<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30ab\u30b9\u30bf\u30e0\u30a4\u30c6\u30ec\u30fc\u30bf\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ab\u30b9\u30bf\u30e0\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u305ffor_each\ntemplate&lt;typename Container, typename Func&gt;\nvoid for_each_indexed(Container&amp; c, Func f) {\n    size_t index = 0;\n    std::for_each(c.begin(), c.end(),\n        [&amp;index, &amp;f](auto&amp; element) {\n            f(index++, element);\n        });\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nstd::vector&lt;std::string&gt; names = {\"Alice\", \"Bob\", \"Charlie\"};\nfor_each_indexed(names,\n    [](size_t i, const std::string&amp; name) {\n        std::cout &lt;&lt; i &lt;&lt; \": \" &lt;&lt; name &lt;&lt; '\\n';\n    });<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u4e26\u5217\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u306efor\u6587\u306e\u5fdc\u7528<\/h3>\n\n\n\n<p>C++17\u3067\u5c0e\u5165\u3055\u308c\u305f\u4e26\u5217\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001for\u6587\u306e\u51e6\u7406\u3092\u7c21\u5358\u306b\u4e26\u5217\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u57fa\u672c\u7684\u306a\u4e26\u5217for_each<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;execution&gt;\nstd::vector&lt;int&gt; large_vector(1000000);\n\n\/\/ \u4e26\u5217\u5b9f\u884c\nstd::for_each(std::execution::par,\n    large_vector.begin(), large_vector.end(),\n    [](int&amp; n) { \n        \/\/ \u91cd\u3044\u8a08\u7b97\n        n = static_cast&lt;int&gt;(std::sqrt(std::pow(n, 3)));\n    });\n\n\/\/ \u4e26\u5217\u975e\u9806\u5e8f\u5b9f\u884c\nstd::for_each(std::execution::par_unseq,\n    large_vector.begin(), large_vector.end(),\n    [](int&amp; n) { n *= 2; });<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4e26\u5217\u30ea\u30c0\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u4e26\u5217\u30ea\u30c0\u30af\u30b7\u30e7\u30f3\uff08\u7dcf\u548c\u306e\u8a08\u7b97\uff09\nauto parallel_sum = [](const std::vector&lt;int&gt;&amp; vec) {\n    return std::reduce(std::execution::par,\n        vec.begin(), vec.end(), 0);\n};\n\n\/\/ \u4e26\u5217\u5909\u63db\uff0b\u30ea\u30c0\u30af\u30b7\u30e7\u30f3\nauto parallel_transform_reduce = [](const std::vector&lt;int&gt;&amp; vec) {\n    return std::transform_reduce(\n        std::execution::par,\n        vec.begin(), vec.end(),\n        0,\n        std::plus&lt;&gt;(),\n        [](int n) { return n * n; }\n    );\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u4f9d\u5b58\u6027\u3092\u8003\u616e\u3057\u305f\u4e26\u5217\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c7\u30fc\u30bf\u4f9d\u5b58\u6027\u306e\u306a\u3044\u51e6\u7406\u306e\u4e26\u5217\u5316\nstd::vector&lt;std::vector&lt;int&gt;&gt; matrix(1000, std::vector&lt;int&gt;(1000));\nstd::for_each(std::execution::par,\n    matrix.begin(), matrix.end(),\n    [](auto&amp; row) {\n        std::transform(row.begin(), row.end(),\n            row.begin(),\n            [](int n) { return n * 2; });\n    });\n\n\/\/ \u4f9d\u5b58\u95a2\u4fc2\u306e\u3042\u308b\u51e6\u7406\u306e\u9069\u5207\u306a\u5206\u5272\nstruct Block {\n    std::vector&lt;int&gt; data;\n    std::mutex mutex;\n};\n\nstd::vector&lt;Block&gt; blocks(100);\nstd::for_each(std::execution::par,\n    blocks.begin(), blocks.end(),\n    [](Block&amp; block) {\n        std::lock_guard&lt;std::mutex&gt; lock(block.mutex);\n        \/\/ \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u51e6\u7406\n        for (auto&amp; n : block.data) {\n            n = static_cast&lt;int&gt;(std::sqrt(n));\n        }\n    });<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30e2\u30c0\u30f3\u306a\u6a5f\u80fd\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u3084\u6027\u80fd\u8981\u6c42\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6a5f\u80fd\u304c\u771f\u4fa1\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">for\u6587\u306e\u843d\u3068\u3057\u7a74\u3068\u5bfe\u7b56<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u3068\u30c7\u30d0\u30c3\u30b0\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>for\u6587\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u5883\u754c\u306e\u8aa4\u308a<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Bad: \u914d\u5217\u306e\u5883\u754c\u3092\u8d85\u3048\u305f\u30a2\u30af\u30bb\u30b9\nint arr[5] = {1, 2, 3, 4, 5};\nfor (int i = 0; i &lt;= 5; i++) {  \/\/ &lt;= \u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\n    std::cout &lt;&lt; arr[i] &lt;&lt; ' ';  \/\/ \u5883\u754c\u5916\u30a2\u30af\u30bb\u30b9\uff01\n}\n\n\/\/ Good: \u6b63\u3057\u3044\u5883\u754c\u30c1\u30a7\u30c3\u30af\nfor (int i = 0; i &lt; 5; i++) {  \/\/ &lt; \u3092\u4f7f\u7528\n    std::cout &lt;&lt; arr[i] &lt;&lt; ' ';\n}\n\n\/\/ Better: \u30b5\u30a4\u30ba\u3092\u52d5\u7684\u306b\u53d6\u5f97\nconst size_t size = sizeof(arr) \/ sizeof(arr[0]);\nfor (size_t i = 0; i &lt; size; i++) {\n    std::cout &lt;&lt; arr[i] &lt;&lt; ' ';\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u7121\u9650\u30eb\u30fc\u30d7\u306e\u9632\u6b62<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Bad: \u610f\u56f3\u3057\u306a\u3044\u7121\u9650\u30eb\u30fc\u30d7\nfor (unsigned int i = 10; i &gt;= 0; --i) {  \/\/ unsigned int\u306f0\u672a\u6e80\u306b\u306a\u3089\u306a\u3044\n    std::cout &lt;&lt; i &lt;&lt; ' ';\n}\n\n\/\/ Good: \u9069\u5207\u306a\u578b\u3068\u6761\u4ef6\u306e\u4f7f\u7528\nfor (int i = 10; i &gt;= 0; --i) {\n    std::cout &lt;&lt; i &lt;&lt; ' ';\n}\n\n\/\/ \u30c7\u30d0\u30c3\u30b0\u7528\u306e\u30ac\u30fc\u30c9\u8ffd\u52a0\nfor (int i = 0, guard = 0; i &lt; someValue &amp;&amp; guard &lt; 1000; ++i, ++guard) {\n    \/\/ \u7121\u9650\u30eb\u30fc\u30d7\u306e\u53ef\u80fd\u6027\u304c\u3042\u308b\u51e6\u7406\n    if (guard == 999) {\n        std::cerr &lt;&lt; \"Possible infinite loop detected\\n\";\n        break;\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u7121\u52b9\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; vec = {1, 2, 3, 4, 5};\n\n\/\/ Bad: \u30a4\u30c6\u30ec\u30fc\u30bf\u304c\u7121\u52b9\u5316\u3055\u308c\u308b\nfor (auto it = vec.begin(); it != vec.end(); ++it) {\n    if (*it % 2 == 0) {\n        vec.push_back(*it);  \/\/ \u8981\u7d20\u8ffd\u52a0\u306b\u3088\u308a\u30a4\u30c6\u30ec\u30fc\u30bf\u304c\u7121\u52b9\u5316\n    }\n}\n\n\/\/ Good: \u5b89\u5168\u306a\u5b9f\u88c5\nstd::vector&lt;int&gt; temp;\nfor (const auto&amp; num : vec) {\n    if (num % 2 == 0) {\n        temp.push_back(num);\n    }\n}\nvec.insert(vec.end(), temp.begin(), temp.end());<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u60aa\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u4e00\u822c\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u6539\u5584\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e0d\u5fc5\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30d4\u30fc<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;std::string&gt; strings = {\"Hello\", \"World\"};\n\n\/\/ Bad: \u8981\u7d20\u306e\u30b3\u30d4\u30fc\u304c\u767a\u751f\nfor (auto str : strings) {\n    str += \"!\";  \/\/ \u30b3\u30d4\u30fc\u3055\u308c\u305f\u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5909\u66f4\n}\n\n\/\/ Good: \u53c2\u7167\u3092\u4f7f\u7528\nfor (auto&amp; str : strings) {\n    str += \"!\";  \/\/ \u5b9f\u969b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u76f4\u63a5\u5909\u66f4\n}\n\n\/\/ Best: \u5909\u66f4\u4e0d\u8981\u306a\u5834\u5408\u306fconst\u53c2\u7167\nfor (const auto&amp; str : strings) {\n    std::cout &lt;&lt; str &lt;&lt; '\\n';\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u975e\u52b9\u7387\u306a\u30b3\u30f3\u30c6\u30ca\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; numbers;\n\n\/\/ Bad: \u983b\u7e41\u306a\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\nfor (int i = 0; i &lt; 10000; ++i) {\n    numbers.push_back(i);\n}\n\n\/\/ Good: \u4e8b\u524d\u306b\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\nnumbers.reserve(10000);\nfor (int i = 0; i &lt; 10000; ++i) {\n    numbers.push_back(i);\n}\n\n\/\/ Bad: \u8981\u7d20\u306e\u983b\u7e41\u306a\u524a\u9664\nfor (auto it = numbers.begin(); it != numbers.end();) {\n    if (*it % 2 == 0) {\n        it = numbers.erase(it);  \/\/ \u6bce\u56de\u8981\u7d20\u3092\u30b7\u30d5\u30c8\n    } else {\n        ++it;\n    }\n}\n\n\/\/ Good: \u524a\u9664\u3059\u308b\u8981\u7d20\u3092\u30de\u30fc\u30af\u3057\u3066\u304b\u3089\u4e00\u62ec\u524a\u9664\nnumbers.erase(\n    std::remove_if(numbers.begin(), numbers.end(),\n        [](int n) { return n % 2 == 0; }),\n    numbers.end()\n);<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u306e\u60aa\u3044\u64cd\u4f5c<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Bad: \u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u306e\u60aa\u3044\u30a2\u30af\u30bb\u30b9\u30d1\u30bf\u30fc\u30f3\nconst int size = 1000;\nstd::vector&lt;std::vector&lt;int&gt;&gt; matrix(size, std::vector&lt;int&gt;(size));\n\nfor (int j = 0; j &lt; size; ++j) {\n    for (int i = 0; i &lt; size; ++i) {\n        matrix[i][j] = i + j;  \/\/ \u5217\u512a\u5148\u30a2\u30af\u30bb\u30b9\n    }\n}\n\n\/\/ Good: \u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u30a2\u30af\u30bb\u30b9\nfor (int i = 0; i &lt; size; ++i) {\n    for (int j = 0; j &lt; size; ++j) {\n        matrix[i][j] = i + j;  \/\/ \u884c\u512a\u5148\u30a2\u30af\u30bb\u30b9\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>for\u6587\u4f7f\u7528\u6642\u306e\u30e1\u30e2\u30ea\u7ba1\u7406\u306b\u95a2\u3059\u308b\u554f\u984c\u3068\u305d\u306e\u5bfe\u7b56\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Bad: \u751f\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528\u3067\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u5371\u967a\nstd::vector&lt;MyClass*&gt; objects;\nfor (int i = 0; i &lt; 10; ++i) {\n    objects.push_back(new MyClass());  \/\/ \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u53ef\u80fd\u6027\n}\n\n\/\/ Good: \u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528\nstd::vector&lt;std::unique_ptr&lt;MyClass&gt;&gt; safe_objects;\nfor (int i = 0; i &lt; 10; ++i) {\n    safe_objects.push_back(std::make_unique&lt;MyClass&gt;());\n}\n\n\/\/ \u5171\u6709\u30ea\u30bd\u30fc\u30b9\u306e\u5834\u5408\nstd::vector&lt;std::shared_ptr&lt;MyClass&gt;&gt; shared_objects;\nfor (int i = 0; i &lt; 10; ++i) {\n    shared_objects.push_back(std::make_shared&lt;MyClass&gt;());\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>RAII\u539f\u5247\u306e\u9075\u5b88<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Bad: \u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u304c\u4e0d\u9069\u5207\nfor (int i = 0; i &lt; file_count; ++i) {\n    FILE* file = fopen(filenames[i], \"r\");\n    \/\/ \u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u3068\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb\u304c\u30ea\u30fc\u30af\u3059\u308b\n    process_file(file);\n    fclose(file);\n}\n\n\/\/ Good: RAII\u306b\u3088\u308b\u81ea\u52d5\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\nfor (int i = 0; i &lt; file_count; ++i) {\n    std::ifstream file(filenames[i]);  \/\/ RAII\u3067\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb\u3092\u7ba1\u7406\n    process_file(file);\n}  \/\/ file\u306f\u81ea\u52d5\u7684\u306b\u30af\u30ed\u30fc\u30ba\u3055\u308c\u308b<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ Bad: \u4f8b\u5916\u6642\u306b\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u53ef\u80fd\u6027\nvoid process_data() {\n    for (int i = 0; i &lt; count; ++i) {\n        Resource* res = new Resource();\n        \/\/ \u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u3068\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\n        process(res);\n        delete res;\n    }\n}\n\n\/\/ Good: \u4f8b\u5916\u5b89\u5168\u306a\u5b9f\u88c5\nvoid safe_process_data() {\n    for (int i = 0; i &lt; count; ++i) {\n        auto res = std::make_unique&lt;Resource&gt;();\n        process(res.get());\n    }  \/\/ \u30ea\u30bd\u30fc\u30b9\u306f\u81ea\u52d5\u7684\u306b\u89e3\u653e\u3055\u308c\u308b\n}\n\n\/\/ Better: \u30b9\u30b3\u30fc\u30d7\u30ac\u30fc\u30c9\u306e\u4f7f\u7528\nfor (int i = 0; i &lt; count; ++i) {\n    Resource* res = new Resource();\n    auto guard = std::unique_ptr&lt;Resource&gt;(res);  \/\/ \u30b9\u30b3\u30fc\u30d7\u30ac\u30fc\u30c9\n    process(res);  \/\/ \u4f8b\u5916\u304c\u767a\u751f\u3057\u3066\u3082\u5b89\u5168\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u843d\u3068\u3057\u7a74\u3092\u8a8d\u8b58\u3057\u3001\u9069\u5207\u306a\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b88\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308bfor\u6587\u6d3b\u7528\u4e8b\u4f8b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u5b9f\u52d9\u3067\u906d\u9047\u3059\u308b\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3044\u3066\u3001for\u6587\u3092\u52b9\u7387\u7684\u306b\u6d3b\u7528\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c1\u30e3\u30f3\u30af\u51e6\u7406\u306b\u3088\u308b\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DataProcessor {\npublic:\n    \/\/ \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3092\u5c0f\u3055\u306a\u30c1\u30e3\u30f3\u30af\u306b\u5206\u5272\u3057\u3066\u51e6\u7406\n    void processLargeDataset(const std::vector&lt;Record&gt;&amp; records) {\n        const size_t chunk_size = 1000;\n        const size_t total_size = records.size();\n\n        \/\/ \u9032\u6357\u7ba1\u7406\u7528\u306e\u30ab\u30a6\u30f3\u30bf\u30fc\n        std::atomic&lt;size_t&gt; processed_count{0};\n\n        \/\/ \u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u3067\u306e\u51e6\u7406\n        for (size_t offset = 0; offset &lt; total_size; offset += chunk_size) {\n            size_t current_chunk_size = std::min(chunk_size, total_size - offset);\n            processChunk(records, offset, current_chunk_size, processed_count);\n\n            \/\/ \u9032\u6357\u5831\u544a\n            double progress = (static_cast&lt;double&gt;(offset + current_chunk_size) \/ total_size) * 100.0;\n            std::cout &lt;&lt; \"\\rProgress: \" &lt;&lt; std::fixed &lt;&lt; std::setprecision(1) &lt;&lt; progress &lt;&lt; \"%\" &lt;&lt; std::flush;\n        }\n        std::cout &lt;&lt; \"\\nProcessing completed.\" &lt;&lt; std::endl;\n    }\n\nprivate:\n    void processChunk(const std::vector&lt;Record&gt;&amp; records, \n                     size_t offset, \n                     size_t chunk_size,\n                     std::atomic&lt;size_t&gt;&amp; processed_count) {\n        for (size_t i = 0; i &lt; chunk_size; ++i) {\n            const auto&amp; record = records[offset + i];\n            processRecord(record);\n            ++processed_count;\n        }\n    }\n\n    void processRecord(const Record&amp; record) {\n        \/\/ \u500b\u5225\u30ec\u30b3\u30fc\u30c9\u306e\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30d0\u30c3\u30c1\u51e6\u7406\u3068\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class BatchProcessor {\npublic:\n    void processBatch(std::vector&lt;Transaction&gt;&amp; transactions) {\n        const size_t batch_size = 100;\n        std::vector&lt;Transaction&gt; failed_transactions;\n\n        \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u30d0\u30c3\u30c1\u51e6\u7406\n        for (size_t i = 0; i &lt; transactions.size(); i += batch_size) {\n            auto batch_end = std::min(i + batch_size, transactions.size());\n            try {\n                DatabaseTransaction db_transaction;  \/\/ RAII\u3067\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7ba1\u7406\n\n                for (size_t j = i; j &lt; batch_end; ++j) {\n                    if (!processTransaction(transactions[j])) {\n                        failed_transactions.push_back(transactions[j]);\n                    }\n                }\n\n                db_transaction.commit();\n            } catch (const std::exception&amp; e) {\n                std::cerr &lt;&lt; \"Batch processing failed: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n                \/\/ \u5931\u6557\u3057\u305f\u30d0\u30c3\u30c1\u3092\u518d\u8a66\u884c\u30ad\u30e5\u30fc\u306b\u8ffd\u52a0\n                for (size_t j = i; j &lt; batch_end; ++j) {\n                    failed_transactions.push_back(transactions[j]);\n                }\n            }\n        }\n\n        \/\/ \u5931\u6557\u3057\u305f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u518d\u51e6\u7406\n        if (!failed_transactions.empty()) {\n            handleFailedTransactions(failed_transactions);\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u5b89\u5168\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306efor\u6587\u306e\u5b89\u5168\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u3001\u52b9\u7387\u7684\u306a\u4e26\u5217\u51e6\u7406\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u305f\u4e26\u5217\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ThreadSafeProcessor {\npublic:\n    ThreadSafeProcessor(size_t thread_count = std::thread::hardware_concurrency())\n        : thread_pool_(thread_count) {}\n\n    void processItems(const std::vector&lt;Item&gt;&amp; items) {\n        \/\/ \u51e6\u7406\u7d50\u679c\u3092\u683c\u7d0d\u3059\u308b\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30b3\u30f3\u30c6\u30ca\n        std::vector&lt;Result&gt; results(items.size());\n        std::mutex results_mutex;\n        std::atomic&lt;size_t&gt; completed_count{0};\n\n        \/\/ \u30bf\u30b9\u30af\u3092\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306b\u5206\u914d\n        for (size_t i = 0; i &lt; items.size(); ++i) {\n            thread_pool_.enqueue([this, &amp;items, &amp;results, &amp;results_mutex, &amp;completed_count, i]() {\n                Result result = processItem(items[i]);\n\n                {\n                    std::lock_guard&lt;std::mutex&gt; lock(results_mutex);\n                    results[i] = std::move(result);\n                }\n\n                ++completed_count;\n            });\n        }\n\n        \/\/ \u5168\u30bf\u30b9\u30af\u306e\u5b8c\u4e86\u3092\u5f85\u6a5f\n        while (completed_count &lt; items.size()) {\n            std::this_thread::sleep_for(std::chrono::milliseconds(100));\n            double progress = (static_cast&lt;double&gt;(completed_count) \/ items.size()) * 100.0;\n            std::cout &lt;&lt; \"\\rProgress: \" &lt;&lt; progress &lt;&lt; \"%\" &lt;&lt; std::flush;\n        }\n        std::cout &lt;&lt; \"\\nAll tasks completed.\" &lt;&lt; std::endl;\n    }\n\nprivate:\n    ThreadPool thread_pool_;\n\n    Result processItem(const Item&amp; item) {\n        \/\/ \u500b\u5225\u30a2\u30a4\u30c6\u30e0\u306e\u51e6\u7406\n        Result result;\n        \/\/ \u51e6\u7406\u30ed\u30b8\u30c3\u30af\n        return result;\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4e26\u5217\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ParallelDataProcessor {\npublic:\n    void processData(std::vector&lt;Data&gt;&amp; data) {\n        \/\/ \u30c7\u30fc\u30bf\u306e\u4e26\u5217\u5909\u63db\n        std::for_each(std::execution::par_unseq, \n                      data.begin(), data.end(),\n                      [this](Data&amp; item) {\n                          processDataItem(item);\n                      });\n\n        \/\/ \u4e26\u5217\u30ea\u30c0\u30af\u30b7\u30e7\u30f3\n        auto total = std::reduce(std::execution::par,\n                               data.begin(), data.end(),\n                               0.0,\n                               [](double acc, const Data&amp; item) {\n                                   return acc + item.getValue();\n                               });\n\n        std::cout &lt;&lt; \"Total value: \" &lt;&lt; total &lt;&lt; std::endl;\n    }\n\nprivate:\n    void processDataItem(Data&amp; item) {\n        \/\/ \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305ffor\u6587\u306e\u8a2d\u8a08<\/h3>\n\n\n\n<p>\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306afor\u6587\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3068\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u306e\u4f5c\u6210\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u53cd\u5fa9\u51e6\u7406\u306e\u8a2d\u8a08<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u8a2d\u8a08\nclass DataIterator {\npublic:\n    explicit DataIterator(std::shared_ptr&lt;IDataSource&gt; data_source)\n        : data_source_(std::move(data_source)) {}\n\n    void processData() {\n        auto data = data_source_-&gt;getData();\n        ProcessingResult result;\n\n        for (const auto&amp; item : data) {\n            if (shouldProcess(item)) {\n                auto processed_item = processItem(item);\n                result.addProcessedItem(processed_item);\n            }\n        }\n\n        data_source_-&gt;saveResult(result);\n    }\n\n    \/\/ \u30c6\u30b9\u30c8\u7528\u306b\u516c\u958b\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9\n    bool shouldProcess(const DataItem&amp; item) const {\n        return item.isValid() &amp;&amp; meetsProcessingCriteria(item);\n    }\n\n    ProcessedItem processItem(const DataItem&amp; item) const {\n        \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5\n        return ProcessedItem(item);\n    }\n\nprivate:\n    std::shared_ptr&lt;IDataSource&gt; data_source_;\n\n    bool meetsProcessingCriteria(const DataItem&amp; item) const {\n        \/\/ \u51e6\u7406\u57fa\u6e96\u306e\u30c1\u30a7\u30c3\u30af\n        return true;\n    }\n};\n\n\/\/ \u5bfe\u5fdc\u3059\u308b\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\nclass DataIteratorTest : public ::testing::Test {\nprotected:\n    void SetUp() override {\n        data_source_ = std::make_shared&lt;MockDataSource&gt;();\n        iterator_ = std::make_unique&lt;DataIterator&gt;(data_source_);\n    }\n\n    std::shared_ptr&lt;MockDataSource&gt; data_source_;\n    std::unique_ptr&lt;DataIterator&gt; iterator_;\n};\n\nTEST_F(DataIteratorTest, ShouldProcessValidItem) {\n    DataItem valid_item(true);\n    EXPECT_TRUE(iterator_-&gt;shouldProcess(valid_item));\n}\n\nTEST_F(DataIteratorTest, ShouldNotProcessInvalidItem) {\n    DataItem invalid_item(false);\n    EXPECT_FALSE(iterator_-&gt;shouldProcess(invalid_item));\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30e2\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u305f\u30c6\u30b9\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class MockProcessor : public IDataProcessor {\npublic:\n    MOCK_METHOD(void, processItem, (const DataItem&amp;), (override));\n};\n\nTEST(DataProcessingTest, ProcessesAllItemsInBatch) {\n    \/\/ \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u6e96\u5099\n    std::vector&lt;DataItem&gt; items = {\n        DataItem(1), DataItem(2), DataItem(3)\n    };\n\n    \/\/ \u30e2\u30c3\u30af\u306e\u8a2d\u5b9a\n    MockProcessor processor;\n    EXPECT_CALL(processor, processItem(testing::_))\n        .Times(items.size());\n\n    \/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u51e6\u7406\u5b9f\u884c\n    for (const auto&amp; item : items) {\n        processor.processItem(item);\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30c6\u30b9\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ProcessingTest : public testing::TestWithParam&lt;std::tuple&lt;DataItem, bool&gt;&gt; {\nprotected:\n    DataProcessor processor_;\n};\n\nTEST_P(ProcessingTest, ValidatesItemsCorrectly) {\n    auto [item, expected] = GetParam();\n    EXPECT_EQ(processor_.isValid(item), expected);\n}\n\nINSTANTIATE_TEST_SUITE_P(\n    ProcessingTestSuite,\n    ProcessingTest,\n    testing::Values(\n        std::make_tuple(DataItem(true), true),\n        std::make_tuple(DataItem(false), false),\n        std::make_tuple(DataItem(true, 5), true),\n        std::make_tuple(DataItem(false, 0), false)\n    )\n);<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u306f\u3001\u5b9f\u52d9\u3067\u76f4\u9762\u3059\u308b\u69d8\u3005\u306a\u8981\u4ef6\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u5805\u7262\u306a\u30b3\u30fc\u30c9\u306e\u57fa\u790e\u3068\u306a\u308a\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u30c6\u30a3\u3001\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u4fe1\u983c\u3067\u304d\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-20\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308bfor\u6587\u6d3b\u7528\u4e8b\u4f8b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u5b9f\u52d9\u3067\u906d\u9047\u3059\u308b\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3044\u3066\u3001for\u6587\u3092\u52b9\u7387\u7684\u306b\u6d3b\u7528\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c1\u30e3\u30f3\u30af\u51e6\u7406\u306b\u3088\u308b\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DataProcessor {\npublic:\n    \/\/ \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3092\u5c0f\u3055\u306a\u30c1\u30e3\u30f3\u30af\u306b\u5206\u5272\u3057\u3066\u51e6\u7406\n    void processLargeDataset(const std::vector&lt;Record&gt;&amp; records) {\n        const size_t chunk_size = 1000;\n        const size_t total_size = records.size();\n\n        \/\/ \u9032\u6357\u7ba1\u7406\u7528\u306e\u30ab\u30a6\u30f3\u30bf\u30fc\n        std::atomic&lt;size_t&gt; processed_count{0};\n\n        \/\/ \u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u3067\u306e\u51e6\u7406\n        for (size_t offset = 0; offset &lt; total_size; offset += chunk_size) {\n            size_t current_chunk_size = std::min(chunk_size, total_size - offset);\n            processChunk(records, offset, current_chunk_size, processed_count);\n\n            \/\/ \u9032\u6357\u5831\u544a\n            double progress = (static_cast&lt;double&gt;(offset + current_chunk_size) \/ total_size) * 100.0;\n            std::cout &lt;&lt; \"\\rProgress: \" &lt;&lt; std::fixed &lt;&lt; std::setprecision(1) &lt;&lt; progress &lt;&lt; \"%\" &lt;&lt; std::flush;\n        }\n        std::cout &lt;&lt; \"\\nProcessing completed.\" &lt;&lt; std::endl;\n    }\n\nprivate:\n    void processChunk(const std::vector&lt;Record&gt;&amp; records, \n                     size_t offset, \n                     size_t chunk_size,\n                     std::atomic&lt;size_t&gt;&amp; processed_count) {\n        for (size_t i = 0; i &lt; chunk_size; ++i) {\n            const auto&amp; record = records[offset + i];\n            processRecord(record);\n            ++processed_count;\n        }\n    }\n\n    void processRecord(const Record&amp; record) {\n        \/\/ \u500b\u5225\u30ec\u30b3\u30fc\u30c9\u306e\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30d0\u30c3\u30c1\u51e6\u7406\u3068\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class BatchProcessor {\npublic:\n    void processBatch(std::vector&lt;Transaction&gt;&amp; transactions) {\n        const size_t batch_size = 100;\n        std::vector&lt;Transaction&gt; failed_transactions;\n\n        \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u30d0\u30c3\u30c1\u51e6\u7406\n        for (size_t i = 0; i &lt; transactions.size(); i += batch_size) {\n            auto batch_end = std::min(i + batch_size, transactions.size());\n            try {\n                DatabaseTransaction db_transaction;  \/\/ RAII\u3067\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7ba1\u7406\n\n                for (size_t j = i; j &lt; batch_end; ++j) {\n                    if (!processTransaction(transactions[j])) {\n                        failed_transactions.push_back(transactions[j]);\n                    }\n                }\n\n                db_transaction.commit();\n            } catch (const std::exception&amp; e) {\n                std::cerr &lt;&lt; \"Batch processing failed: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n                \/\/ \u5931\u6557\u3057\u305f\u30d0\u30c3\u30c1\u3092\u518d\u8a66\u884c\u30ad\u30e5\u30fc\u306b\u8ffd\u52a0\n                for (size_t j = i; j &lt; batch_end; ++j) {\n                    failed_transactions.push_back(transactions[j]);\n                }\n            }\n        }\n\n        \/\/ \u5931\u6557\u3057\u305f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u518d\u51e6\u7406\n        if (!failed_transactions.empty()) {\n            handleFailedTransactions(failed_transactions);\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u5b89\u5168\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306efor\u6587\u306e\u5b89\u5168\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u3001\u52b9\u7387\u7684\u306a\u4e26\u5217\u51e6\u7406\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u305f\u4e26\u5217\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ThreadSafeProcessor {\npublic:\n    ThreadSafeProcessor(size_t thread_count = std::thread::hardware_concurrency())\n        : thread_pool_(thread_count) {}\n\n    void processItems(const std::vector&lt;Item&gt;&amp; items) {\n        \/\/ \u51e6\u7406\u7d50\u679c\u3092\u683c\u7d0d\u3059\u308b\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30b3\u30f3\u30c6\u30ca\n        std::vector&lt;Result&gt; results(items.size());\n        std::mutex results_mutex;\n        std::atomic&lt;size_t&gt; completed_count{0};\n\n        \/\/ \u30bf\u30b9\u30af\u3092\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306b\u5206\u914d\n        for (size_t i = 0; i &lt; items.size(); ++i) {\n            thread_pool_.enqueue([this, &amp;items, &amp;results, &amp;results_mutex, &amp;completed_count, i]() {\n                Result result = processItem(items[i]);\n\n                {\n                    std::lock_guard&lt;std::mutex&gt; lock(results_mutex);\n                    results[i] = std::move(result);\n                }\n\n                ++completed_count;\n            });\n        }\n\n        \/\/ \u5168\u30bf\u30b9\u30af\u306e\u5b8c\u4e86\u3092\u5f85\u6a5f\n        while (completed_count &lt; items.size()) {\n            std::this_thread::sleep_for(std::chrono::milliseconds(100));\n            double progress = (static_cast&lt;double&gt;(completed_count) \/ items.size()) * 100.0;\n            std::cout &lt;&lt; \"\\rProgress: \" &lt;&lt; progress &lt;&lt; \"%\" &lt;&lt; std::flush;\n        }\n        std::cout &lt;&lt; \"\\nAll tasks completed.\" &lt;&lt; std::endl;\n    }\n\nprivate:\n    ThreadPool thread_pool_;\n\n    Result processItem(const Item&amp; item) {\n        \/\/ \u500b\u5225\u30a2\u30a4\u30c6\u30e0\u306e\u51e6\u7406\n        Result result;\n        \/\/ \u51e6\u7406\u30ed\u30b8\u30c3\u30af\n        return result;\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4e26\u5217\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ParallelDataProcessor {\npublic:\n    void processData(std::vector&lt;Data&gt;&amp; data) {\n        \/\/ \u30c7\u30fc\u30bf\u306e\u4e26\u5217\u5909\u63db\n        std::for_each(std::execution::par_unseq, \n                      data.begin(), data.end(),\n                      [this](Data&amp; item) {\n                          processDataItem(item);\n                      });\n\n        \/\/ \u4e26\u5217\u30ea\u30c0\u30af\u30b7\u30e7\u30f3\n        auto total = std::reduce(std::execution::par,\n                               data.begin(), data.end(),\n                               0.0,\n                               [](double acc, const Data&amp; item) {\n                                   return acc + item.getValue();\n                               });\n\n        std::cout &lt;&lt; \"Total value: \" &lt;&lt; total &lt;&lt; std::endl;\n    }\n\nprivate:\n    void processDataItem(Data&amp; item) {\n        \/\/ \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305ffor\u6587\u306e\u8a2d\u8a08<\/h3>\n\n\n\n<p>\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306afor\u6587\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3068\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u306e\u4f5c\u6210\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u53cd\u5fa9\u51e6\u7406\u306e\u8a2d\u8a08<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u8a2d\u8a08\nclass DataIterator {\npublic:\n    explicit DataIterator(std::shared_ptr&lt;IDataSource&gt; data_source)\n        : data_source_(std::move(data_source)) {}\n\n    void processData() {\n        auto data = data_source_-&gt;getData();\n        ProcessingResult result;\n\n        for (const auto&amp; item : data) {\n            if (shouldProcess(item)) {\n                auto processed_item = processItem(item);\n                result.addProcessedItem(processed_item);\n            }\n        }\n\n        data_source_-&gt;saveResult(result);\n    }\n\n    \/\/ \u30c6\u30b9\u30c8\u7528\u306b\u516c\u958b\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9\n    bool shouldProcess(const DataItem&amp; item) const {\n        return item.isValid() &amp;&amp; meetsProcessingCriteria(item);\n    }\n\n    ProcessedItem processItem(const DataItem&amp; item) const {\n        \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5\n        return ProcessedItem(item);\n    }\n\nprivate:\n    std::shared_ptr&lt;IDataSource&gt; data_source_;\n\n    bool meetsProcessingCriteria(const DataItem&amp; item) const {\n        \/\/ \u51e6\u7406\u57fa\u6e96\u306e\u30c1\u30a7\u30c3\u30af\n        return true;\n    }\n};\n\n\/\/ \u5bfe\u5fdc\u3059\u308b\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\nclass DataIteratorTest : public ::testing::Test {\nprotected:\n    void SetUp() override {\n        data_source_ = std::make_shared&lt;MockDataSource&gt;();\n        iterator_ = std::make_unique&lt;DataIterator&gt;(data_source_);\n    }\n\n    std::shared_ptr&lt;MockDataSource&gt; data_source_;\n    std::unique_ptr&lt;DataIterator&gt; iterator_;\n};\n\nTEST_F(DataIteratorTest, ShouldProcessValidItem) {\n    DataItem valid_item(true);\n    EXPECT_TRUE(iterator_-&gt;shouldProcess(valid_item));\n}\n\nTEST_F(DataIteratorTest, ShouldNotProcessInvalidItem) {\n    DataItem invalid_item(false);\n    EXPECT_FALSE(iterator_-&gt;shouldProcess(invalid_item));\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30e2\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u305f\u30c6\u30b9\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class MockProcessor : public IDataProcessor {\npublic:\n    MOCK_METHOD(void, processItem, (const DataItem&amp;), (override));\n};\n\nTEST(DataProcessingTest, ProcessesAllItemsInBatch) {\n    \/\/ \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u306e\u6e96\u5099\n    std::vector&lt;DataItem&gt; items = {\n        DataItem(1), DataItem(2), DataItem(3)\n    };\n\n    \/\/ \u30e2\u30c3\u30af\u306e\u8a2d\u5b9a\n    MockProcessor processor;\n    EXPECT_CALL(processor, processItem(testing::_))\n        .Times(items.size());\n\n    \/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u51e6\u7406\u5b9f\u884c\n    for (const auto&amp; item : items) {\n        processor.processItem(item);\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u3055\u308c\u305f\u30c6\u30b9\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ProcessingTest : public testing::TestWithParam&lt;std::tuple&lt;DataItem, bool&gt;&gt; {\nprotected:\n    DataProcessor processor_;\n};\n\nTEST_P(ProcessingTest, ValidatesItemsCorrectly) {\n    auto [item, expected] = GetParam();\n    EXPECT_EQ(processor_.isValid(item), expected);\n}\n\nINSTANTIATE_TEST_SUITE_P(\n    ProcessingTestSuite,\n    ProcessingTest,\n    testing::Values(\n        std::make_tuple(DataItem(true), true),\n        std::make_tuple(DataItem(false), false),\n        std::make_tuple(DataItem(true, 5), true),\n        std::make_tuple(DataItem(false, 0), false)\n    )\n);<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u306f\u3001\u5b9f\u52d9\u3067\u76f4\u9762\u3059\u308b\u69d8\u3005\u306a\u8981\u4ef6\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u5805\u7262\u306a\u30b3\u30fc\u30c9\u306e\u57fa\u790e\u3068\u306a\u308a\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u30c6\u30a3\u3001\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u4fe1\u983c\u3067\u304d\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":{"0":"post-1775","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-cpp","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1775","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1775"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1775\/revisions"}],"predecessor-version":[{"id":1776,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1775\/revisions\/1776"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}