{"id":2102,"date":"2025-03-24T08:48:18","date_gmt":"2025-03-23T23:48:18","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2102"},"modified":"2025-03-24T08:48:45","modified_gmt":"2025-03-23T23:48:45","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91c%e3%81%aeint%e5%9e%8b%e3%82%92%e4%bd%bf%e3%81%84%e3%81%93%e3%81%aa%e3%81%997%e3%81%a4%e3%81%ae%e5%ae%9f%e8%b7%b5%e3%83%86%e3%82%af","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2102","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011C++\u306eint\u578b\u3092\u4f7f\u3044\u3053\u306a\u30597\u3064\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af \u301c\u30e1\u30e2\u30ea\u52b9\u7387\u304b\u308964\u30d3\u30c3\u30c8\u74b0\u5883\u307e\u3067\u301c"},"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++\u306eint\u578b\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">int\u578b\u306e\u30e1\u30e2\u30ea\u30b5\u30a4\u30ba\u3068\u8868\u73fe\u7bc4\u56f2\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-2\">\u30b7\u30f3\u30dc\u30eb\u4ed8\u304d\u3068\u30b7\u30f3\u30dc\u30eb\u306a\u3057int\u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4f9d\u5b58\u6027\u3068\u30dd\u30fc\u30bf\u30d3\u30ea\u30c6\u30a3\u306e\u512a\u5148\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">int\u3068\u305d\u306e\u4ed6\u306e\u6574\u6570\u578b\u3068\u306e\u6bd4\u8f03<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u30b7\u30e7\u30fc\u30c8\u3068\u30ed\u30f3\u30b0\u3068\u306e\u9055\u3044\u3092\u5b9f\u4f8b\u3067\u7406\u89e3\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u56fa\u5b9a\u5e45\u6574\u6570\u578b\uff08int32_t\u7b49\uff09\u3068\u306e\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">size_t\u3068int\u306e\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">\u52b9\u7387\u7684\u306aint\u578b\u306e\u4f7f\u7528\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">\u30e1\u30e2\u30ea\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u624b\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306aint\u914d\u5217\u306e\u64cd\u4f5c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u6700\u9069\u5316\u30aa\u30d7\u30b7\u30e7\u30f3\u304cint\u578b\u306b\u4e0e\u3048\u308b\u5f71\u97ff<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">int\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u5883\u754c\u5024\u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u5b89\u5168\u306a\u578b\u5909\u63db\u306e\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u6570\u5024\u8a08\u7b97\u6642\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-16\">64\u30d3\u30c3\u30c8\u74b0\u5883\u3067\u306eint\u578b\u306e\u6ce8\u610f\u70b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">ILP64\u3068LP64\u30e2\u30c7\u30eb\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u958b\u767a\u3067\u306e\u578b\u9078\u629e\u6226\u7565<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30dd\u30a4\u30f3\u30bf\u3068int\u306e\u76f8\u4e92\u5909\u63db\u306b\u304a\u3051\u308b\u843d\u3068\u3057\u7a74<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-20\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308bint\u578b\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">\u30d3\u30c3\u30c8\u6f14\u7b97\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-22\">STL\u30b3\u30f3\u30c6\u30ca\u3067\u306eint\u578b\u306e\u6700\u9069\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u306a\u5834\u9762\u3067\u306e\u578b\u9078\u629e<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-24\">\u4eca\u5f8c\u306eC++\u306b\u304a\u3051\u308bint\u578b\u306e\u5c55\u671b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-25\">C++23\u4ee5\u964d\u3067\u306e\u6574\u6570\u578b\u306e\u6539\u5584\u63d0\u6848<\/a>      <\/li>      <li>        <a href=\"#i-26\">\u4eca\u5f8c\u306e\u4e92\u63db\u6027\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u65b9\u91dd<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-27\">\u65b0\u3057\u3044\u6574\u6570\u578b\u306e\u5c0e\u5165\u3068\u6226\u7565\u7684\u79fb\u884c<\/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++\u306eint\u578b\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<p>int\u578b\u306fC++\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u6700\u3082\u57fa\u672c\u7684\u304b\u3064\u91cd\u8981\u306a\u6574\u6570\u578b\u306e\u4e00\u3064\u3067\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001int\u578b\u306e\u57fa\u672c\u7684\u306a\u7279\u5fb4\u3068\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">int\u578b\u306e\u30e1\u30e2\u30ea\u30b5\u30a4\u30ba\u3068\u8868\u73fe\u7bc4\u56f2\u3092\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>int\u578b\u306e\u30e1\u30e2\u30ea\u30b5\u30a4\u30ba\u306f\u3001\u4f7f\u7528\u3059\u308b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3084\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u7279\u5fb4\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n<div id=\"id-f447d27c-393c-4cac-b821-67428a966130\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0<\/th><th>\u30b5\u30a4\u30ba<\/th><th>\u8868\u73fe\u7bc4\u56f2<\/th><\/tr><\/thead><tbody><tr><td>32\u30d3\u30c3\u30c8\u74b0\u5883<\/td><td>4\u30d0\u30a4\u30c8<\/td><td>-2,147,483,648 \uff5e 2,147,483,647<\/td><\/tr><tr><td>64\u30d3\u30c3\u30c8\u74b0\u5883<\/td><td>4\u30d0\u30a4\u30c8\u203b<\/td><td>-2,147,483,648 \uff5e 2,147,483,647<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u203b64\u30d3\u30c3\u30c8\u74b0\u5883\u3067\u3082\u4e00\u822c\u7684\u306b\u306f4\u30d0\u30a4\u30c8\u3067\u3059\u304c\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u5b9f\u88c5\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u5b9f\u969b\u306e\u30b5\u30a4\u30ba\u306f\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3067\u304d\u307e\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=\"\">#include &lt;iostream&gt;\nint main() {\n    std::cout &lt;&lt; \"Size of int: \" &lt;&lt; sizeof(int) &lt;&lt; \" bytes\\n\";\n    std::cout &lt;&lt; \"Max value: \" &lt;&lt; INT_MAX &lt;&lt; \"\\n\";\n    std::cout &lt;&lt; \"Min value: \" &lt;&lt; INT_MIN &lt;&lt; \"\\n\";\n    return 0;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u30b7\u30f3\u30dc\u30eb\u4ed8\u304d\u3068\u30b7\u30f3\u30dc\u30eb\u306a\u3057int\u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>C++\u3067\u306f\u3001signed int\u3068unsigned int\u3068\u3044\u30462\u3064\u306e\u7a2e\u985e\u306eint\u578b\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\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=\"\">signed int x = -10;    \/\/ \u8ca0\u306e\u5024\u3082\u6271\u3048\u308b\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\nunsigned int y = 10;   \/\/ \u8ca0\u306e\u5024\u306f\u6271\u3048\u306a\u3044\u304c\u3001\u6b63\u306e\u5024\u306e\u7bc4\u56f2\u304c2\u500d\u306b\u306a\u308b<\/pre>\n\n\n\n<p>unsigned int\u306e\u7279\u5fb4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8ca0\u306e\u5024\u306f\u8868\u73fe\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>0\u304b\u30894,294,967,295\u307e\u3067\u306e\u5024\u3092\u8868\u73fe\u53ef\u80fd<\/li>\n\n\n\n<li>\u914d\u5217\u306e\u30b5\u30a4\u30ba\u3084\u30eb\u30fc\u30d7\u306e\u30ab\u30a6\u30f3\u30bf\u3068\u3057\u3066\u9069\u3057\u3066\u3044\u308b<\/li>\n\n\n\n<li>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u6642\u306f0\u306b\u623b\u308b\uff08\u5de1\u56de\u7684\u306a\u52d5\u4f5c\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u6709\u7528\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4f9d\u5b58\u6027\u3068\u30dd\u30fc\u30bf\u30d3\u30ea\u30c6\u30a3\u306e\u512a\u5148\u70b9<\/h3>\n\n\n\n<p>int\u578b\u306e\u30b5\u30a4\u30ba\u306f\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4f9d\u5b58\u3067\u3042\u308b\u305f\u3081\u3001\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u958b\u767a\u3067\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5bfe\u7b56\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u56fa\u5b9a\u5e45\u6574\u6570\u578b\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=\"\">#include &lt;cstdint&gt;\nint32_t fixed_size_int = 42;  \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u95a2\u4fc2\u306a\u304f32\u30d3\u30c3\u30c8<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>sizeof\u6f14\u7b97\u5b50\u306b\u3088\u308b\u52d5\u7684\u30c1\u30a7\u30c3\u30af<\/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=\"\">if (sizeof(int) &lt; required_size) {\n    \/\/ \u5fc5\u8981\u306a\u30b5\u30a4\u30ba\u3092\u6e80\u305f\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n    return -1;\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u30a2\u30b5\u30fc\u30b7\u30e7\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=\"\">static_assert(sizeof(int) &gt;= 4, \"int must be at least 4 bytes\");<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u77e5\u8b58\u3092\u8e0f\u307e\u3048\u305f\u4e0a\u3067\u3001\u5b9f\u969b\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3067\u306f\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3092\u6255\u3046\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5024\u306e\u7bc4\u56f2\u304c\u65e2\u77e5\u306e\u5834\u5408\u306f\u3001\u305d\u306e\u7bc4\u56f2\u306b\u9069\u3057\u305f\u578b\u3092\u9078\u629e\u3059\u308b<\/li>\n\n\n\n<li>\u30dd\u30fc\u30bf\u30d3\u30ea\u30c6\u30a3\u304c\u91cd\u8981\u306a\u5834\u5408\u306f\u56fa\u5b9a\u5e45\u6574\u6570\u578b\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u91cd\u8981\u306a\u5834\u5408\u306f\u30cd\u30a4\u30c6\u30a3\u30d6\u306eint\u578b\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u57fa\u790e\u77e5\u8b58\u3092\u3057\u3063\u304b\u308a\u3068\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">int\u3068\u305d\u306e\u4ed6\u306e\u6574\u6570\u578b\u3068\u306e\u6bd4\u8f03<\/h2>\n\n\n\n<p>C++\u306b\u306f\u8907\u6570\u306e\u6574\u6570\u578b\u304c\u7528\u610f\u3055\u308c\u3066\u304a\u308a\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u578b\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001int\u578b\u3068\u4ed6\u306e\u6574\u6570\u578b\u3092\u6bd4\u8f03\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3068\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30b7\u30e7\u30fc\u30c8\u3068\u30ed\u30f3\u30b0\u3068\u306e\u9055\u3044\u3092\u5b9f\u4f8b\u3067\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>C++\u306e\u57fa\u672c\u7684\u306a\u6574\u6570\u578b\u306b\u306f\u3001short\u3068long\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u5404\u578b\u306e\u30b5\u30a4\u30ba\u3068\u7279\u5fb4\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-69ce271f-986a-4665-a460-4a07b5c0c258\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u578b\u540d<\/th><th>\u4e00\u822c\u7684\u306a\u30b5\u30a4\u30ba<\/th><th>\u7279\u5fb4<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>short<\/td><td>2\u30d0\u30a4\u30c8<\/td><td>\u30e1\u30e2\u30ea\u52b9\u7387\u91cd\u8996<\/td><td>\u30e1\u30e2\u30ea\u5236\u7d04\u304c\u53b3\u3057\u3044\u7d44\u307f\u8fbc\u307f\u7cfb<\/td><\/tr><tr><td>int<\/td><td>4\u30d0\u30a4\u30c8<\/td><td>\u30d0\u30e9\u30f3\u30b9\u578b<\/td><td>\u4e00\u822c\u7684\u306a\u6574\u6570\u8a08\u7b97<\/td><\/tr><tr><td>long<\/td><td>4-8\u30d0\u30a4\u30c8<\/td><td>\u5927\u304d\u306a\u5024\u306e\u51e6\u7406<\/td><td>\u5927\u304d\u306a\u6570\u5024\u306e\u8a08\u7b97<\/td><\/tr><tr><td>long long<\/td><td>8\u30d0\u30a4\u30c8<\/td><td>\u8d85\u5927\u304d\u306a\u5024\u306e\u51e6\u7406<\/td><td>64\u30d3\u30c3\u30c8\u5024\u304c\u5fc5\u8981\u306a\u5834\u5408<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\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=\"\">#include &lt;iostream&gt;\n\nvoid compare_integer_types() {\n    \/\/ \u5404\u578b\u306e\u30b5\u30a4\u30ba\u3068\u7bc4\u56f2\u3092\u78ba\u8a8d\n    std::cout &lt;&lt; \"Size of short: \" &lt;&lt; sizeof(short) &lt;&lt; \" bytes\\n\"\n              &lt;&lt; \"Size of int: \" &lt;&lt; sizeof(int) &lt;&lt; \" bytes\\n\"\n              &lt;&lt; \"Size of long: \" &lt;&lt; sizeof(long) &lt;&lt; \" bytes\\n\"\n              &lt;&lt; \"Size of long long: \" &lt;&lt; sizeof(long long) &lt;&lt; \" bytes\\n\";\n\n    \/\/ \u5b9f\u969b\u306e\u4f7f\u7528\u4f8b\n    short small_num = 32767;         \/\/ \u5c0f\u3055\u306a\u7bc4\u56f2\u306e\u5024\n    int normal_num = 2147483647;     \/\/ \u4e00\u822c\u7684\u306a\u6574\u6570\u5024\n    long large_num = 2147483647L;    \/\/ \u5927\u304d\u306a\u5024\uff08L\u30b5\u30d5\u30a3\u30c3\u30af\u30b9\uff09\n    long long huge_num = 9223372036854775807LL;  \/\/ \u8d85\u5927\u304d\u306a\u5024\uff08LL\u30b5\u30d5\u30a3\u30c3\u30af\u30b9\uff09\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u56fa\u5b9a\u5e45\u6574\u6570\u578b\uff08int32_t\u7b49\uff09\u3068\u306e\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>C++11\u4ee5\u964d\u3067\u306f\u3001<code>&lt;cstdint&gt;<\/code>\u30d8\u30c3\u30c0\u3067\u56fa\u5b9a\u5e45\u6574\u6570\u578b\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\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=\"\">#include &lt;cstdint&gt;\n\nvoid fixed_width_integers_example() {\n    \/\/ \u660e\u793a\u7684\u306a\u30d3\u30c3\u30c8\u5e45\u3092\u6301\u3064\u578b\n    int8_t tiny = 127;           \/\/ \u6b63\u78ba\u306b8\u30d3\u30c3\u30c8\n    int16_t small = 32767;       \/\/ \u6b63\u78ba\u306b16\u30d3\u30c3\u30c8\n    int32_t normal = 2147483647; \/\/ \u6b63\u78ba\u306b32\u30d3\u30c3\u30c8\n    int64_t large = 9223372036854775807; \/\/ \u6b63\u78ba\u306b64\u30d3\u30c3\u30c8\n\n    \/\/ \u6700\u5c0f\u5e45\u3092\u6307\u5b9a\u3059\u308b\u578b\n    int_least8_t least_tiny;     \/\/ \u5c11\u306a\u304f\u3068\u30828\u30d3\u30c3\u30c8\n    int_least16_t least_small;   \/\/ \u5c11\u306a\u304f\u3068\u308216\u30d3\u30c3\u30c8\n\n    \/\/ \u6700\u901f\u306e\u578b\n    int_fast32_t fast_int;       \/\/ 32\u30d3\u30c3\u30c8\u4ee5\u4e0a\u3067\u6700\u3082\u9ad8\u901f\u306a\u578b\n}<\/pre>\n\n\n\n<p>\u56fa\u5b9a\u5e45\u6574\u6570\u578b\u306e\u5229\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u9593\u3067\u306e\u4e00\u8cab\u6027\u304c\u4fdd\u8a3c\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u79fb\u690d\u6027\u304c\u9ad8\u3044<\/li>\n\n\n\n<li>\u660e\u793a\u7684\u306a\u30d3\u30c3\u30c8\u5e45\u6307\u5b9a\u306b\u3088\u308b\u30d0\u30b0\u9632\u6b62<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">size_t\u3068int\u306e\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n<p><code>size_t<\/code>\u306f\u3001\u30b5\u30a4\u30ba\u3084\u6dfb\u5b57\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u306e\u7279\u6b8a\u306a\u6574\u6570\u578b\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=\"\">void size_t_usage_example() {\n    std::vector&lt;int&gt; vec = {1, 2, 3, 4, 5};\n\n    \/\/ \u6b63\u3057\u3044\u4f7f\u7528\u4f8b\n    size_t size = vec.size();  \/\/ \u30b3\u30f3\u30c6\u30ca\u306e\u30b5\u30a4\u30ba\n\n    \/\/ \u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u4f7f\u7528\n    for (size_t i = 0; i &lt; vec.size(); ++i) {\n        std::cout &lt;&lt; vec[i] &lt;&lt; std::endl;\n    }\n\n    \/\/ \u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u306e\u4f8b\n    size_t buffer_size = 1024;\n    char* buffer = new char[buffer_size];\n}<\/pre>\n\n\n\n<p>size_t\u3092\u4f7f\u7528\u3059\u3079\u304d\u5834\u9762\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30c6\u30ca\u306e\u30b5\u30a4\u30ba\u3084\u6dfb\u5b57<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u64cd\u4f5c\u306b\u95a2\u9023\u3059\u308b\u5024<\/li>\n\n\n\n<li>\u30dd\u30a4\u30f3\u30bf\u306e\u5dee\u5206\u3092\u8868\u73fe\u3059\u308b\u5834\u5408<\/li>\n<\/ol>\n\n\n\n<p>int\u3092\u4f7f\u7528\u3059\u3079\u304d\u5834\u9762\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e00\u822c\u7684\u306a\u8a08\u7b97<\/li>\n\n\n\n<li>\u8ca0\u306e\u5024\u3092\u6271\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408<\/li>\n\n\n\n<li>API\u3067\u660e\u793a\u7684\u306bint\u578b\u304c\u8981\u6c42\u3055\u308c\u308b\u5834\u5408<\/li>\n<\/ol>\n\n\n\n<p>\u9078\u629e\u306e\u57fa\u6e96\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30b5\u30a4\u30ba\u304c\u91cd\u8981\u306a\u5834\u5408 \u2192 \u9069\u5207\u306a\u56fa\u5b9a\u5e45\u578b<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u91cd\u8981\u306a\u5834\u5408 \u2192 \u30cd\u30a4\u30c6\u30a3\u30d6int\u578b<\/li>\n\n\n\n<li>\u30dd\u30fc\u30bf\u30d3\u30ea\u30c6\u30a3\u304c\u91cd\u8981\u306a\u5834\u5408 \u2192 \u56fa\u5b9a\u5e45\u578b<\/li>\n\n\n\n<li>\u30b5\u30a4\u30ba\u3084\u6dfb\u5b57\u3092\u6271\u3046\u5834\u5408 \u2192 size_t<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">\u52b9\u7387\u7684\u306aint\u578b\u306e\u4f7f\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<p>int\u578b\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30e1\u30e2\u30ea\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u89b3\u70b9\u304b\u3089int\u578b\u306e\u6700\u9069\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u30e1\u30e2\u30ea\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u624b\u6cd5<\/h3>\n\n\n\n<p>\u30e1\u30e2\u30ea\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306f\u3001\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u76f4\u63a5\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u91cd\u8981\u306a\u8981\u7d20\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=\"\">#include &lt;iostream&gt;\n\n\/\/ \u975e\u52b9\u7387\u306a\u30e1\u30e2\u30ea\u30ec\u30a4\u30a2\u30a6\u30c8\nstruct BadAlignment {\n    char c;      \/\/ 1\u30d0\u30a4\u30c8\n    int i;       \/\/ 4\u30d0\u30a4\u30c8\uff083\u30d0\u30a4\u30c8\u306e\u30d1\u30c7\u30a3\u30f3\u30b0\u767a\u751f\uff09\n    char d;      \/\/ 1\u30d0\u30a4\u30c8\uff083\u30d0\u30a4\u30c8\u306e\u30d1\u30c7\u30a3\u30f3\u30b0\u767a\u751f\uff09\n}; \/\/ \u5408\u8a0812\u30d0\u30a4\u30c8\n\n\/\/ \u52b9\u7387\u7684\u306a\u30e1\u30e2\u30ea\u30ec\u30a4\u30a2\u30a6\u30c8\nstruct GoodAlignment {\n    int i;       \/\/ 4\u30d0\u30a4\u30c8\n    char c;      \/\/ 1\u30d0\u30a4\u30c8\n    char d;      \/\/ 1\u30d0\u30a4\u30c8\n    \/\/ 2\u30d0\u30a4\u30c8\u306e\u30d1\u30c7\u30a3\u30f3\u30b0\n}; \/\/ \u5408\u8a088\u30d0\u30a4\u30c8\n\nvoid alignment_example() {\n    std::cout &lt;&lt; \"Size of BadAlignment: \" &lt;&lt; sizeof(BadAlignment) &lt;&lt; \"\\n\";\n    std::cout &lt;&lt; \"Size of GoodAlignment: \" &lt;&lt; sizeof(GoodAlignment) &lt;&lt; \"\\n\";\n\n    \/\/ \u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u8981\u4ef6\u306e\u78ba\u8a8d\n    std::cout &lt;&lt; \"Alignment of int: \" &lt;&lt; alignof(int) &lt;&lt; \"\\n\";\n}<\/pre>\n\n\n\n<p>\u6700\u9069\u5316\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30f3\u30d0\u5909\u6570\u3092\u5927\u304d\u3044\u30b5\u30a4\u30ba\u9806\u306b\u914d\u7f6e<\/li>\n\n\n\n<li>\u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u6307\u5b9a\u5b50\u3092\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306aint\u914d\u5217\u306e\u64cd\u4f5c<\/h3>\n\n\n\n<p>CPU\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u52b9\u7387\u7684\u306b\u5229\u7528\u3059\u308b\u305f\u3081\u306e\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\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=\"\">#include &lt;vector&gt;\n#include &lt;chrono&gt;\n\nvoid cache_friendly_operations() {\n    const int SIZE = 10000;\n    std::vector&lt;int&gt; matrix(SIZE * SIZE);\n\n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u884c\u512a\u5148\u30a2\u30af\u30bb\u30b9\n    auto start = std::chrono::high_resolution_clock::now();\n    for (int i = 0; i &lt; SIZE; ++i) {\n        for (int j = 0; j &lt; SIZE; ++j) {\n            matrix[i * SIZE + j] = i + j;  \/\/ \u9023\u7d9a\u3057\u305f\u30e1\u30e2\u30ea\u30a2\u30af\u30bb\u30b9\n        }\n    }\n    auto end = std::chrono::high_resolution_clock::now();\n    auto duration1 = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end - start);\n\n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u975e\u52b9\u7387\u306a\u5217\u512a\u5148\u30a2\u30af\u30bb\u30b9\n    start = std::chrono::high_resolution_clock::now();\n    for (int j = 0; j &lt; SIZE; ++j) {\n        for (int i = 0; i &lt; SIZE; ++i) {\n            matrix[i * SIZE + j] = i + j;  \/\/ \u4e0d\u9023\u7d9a\u306a\u30e1\u30e2\u30ea\u30a2\u30af\u30bb\u30b9\n        }\n    }\n    end = std::chrono::high_resolution_clock::now();\n    auto duration2 = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end - start);\n\n    std::cout &lt;&lt; \"Row-major access time: \" &lt;&lt; duration1.count() &lt;&lt; \"ms\\n\";\n    std::cout &lt;&lt; \"Column-major access time: \" &lt;&lt; duration2.count() &lt;&lt; \"ms\\n\";\n}<\/pre>\n\n\n\n<p>\u52b9\u7387\u7684\u306a\u914d\u5217\u64cd\u4f5c\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u306e\u9023\u7d9a\u30a2\u30af\u30bb\u30b9\u3092\u610f\u8b58\u3057\u305f\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30e9\u30a4\u30f3\u306e\u5229\u7528\u3092\u6700\u9069\u5316<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30df\u30b9\u306e\u56de\u907f<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u6700\u9069\u5316\u30aa\u30d7\u30b7\u30e7\u30f3\u304cint\u578b\u306b\u4e0e\u3048\u308b\u5f71\u97ff<\/h3>\n\n\n\n<p>\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001int\u578b\u306e\u51e6\u7406\u52b9\u7387\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\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=\"\">\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30aa\u30d7\u30b7\u30e7\u30f3\u5225\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\n#include &lt;chrono&gt;\n\nvoid optimization_example() {\n    const int ITERATIONS = 100000000;\n    volatile int result = 0;  \/\/ \u6700\u9069\u5316\u306e\u5f71\u97ff\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081volatile\u3092\u4f7f\u7528\n\n    auto start = std::chrono::high_resolution_clock::now();\n\n    \/\/ \u6574\u6570\u6f14\u7b97\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\n    for (int i = 0; i &lt; ITERATIONS; ++i) {\n        result += i * 2 \/ 3;  \/\/ \u57fa\u672c\u7684\u306a\u6574\u6570\u6f14\u7b97\n    }\n\n    auto end = std::chrono::high_resolution_clock::now();\n    auto duration = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end - start);\n\n    std::cout &lt;&lt; \"Computation time: \" &lt;&lt; duration.count() &lt;&lt; \"ms\\n\";\n}\n\n\/*\n\u30b3\u30f3\u30d1\u30a4\u30eb\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5f71\u97ff\uff1a\n-O0: \u6700\u9069\u5316\u306a\u3057\n-O1: \u57fa\u672c\u7684\u306a\u6700\u9069\u5316\n-O2: \u3088\u308a\u7a4d\u6975\u7684\u306a\u6700\u9069\u5316\n-O3: \u6700\u5927\u9650\u306e\u6700\u9069\u5316\n*\/<\/pre>\n\n\n\n<p>\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6f14\u7b97\u306e\u52b9\u7387\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=\"\">\/\/ \u975e\u52b9\u7387\u306a\u5b9f\u88c5\nint x = a \/ 2;  \/\/ \u9664\u7b97\u64cd\u4f5c\n\n\/\/ \u52b9\u7387\u7684\u306a\u5b9f\u88c5\nint x = a &gt;&gt; 1;  \/\/ \u30d3\u30c3\u30c8\u30b7\u30d5\u30c8\u306b\u3088\u308b\u6700\u9069\u5316<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30eb\u30fc\u30d7\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=\"\">\/\/ \u30eb\u30fc\u30d7\u30a2\u30f3\u30ed\u30fc\u30ea\u30f3\u30b0\u306e\u4f8b\nvoid loop_optimization() {\n    const int SIZE = 1000000;\n    std::vector&lt;int&gt; data(SIZE);\n\n    \/\/ \u901a\u5e38\u306e\u30eb\u30fc\u30d7\n    for (int i = 0; i &lt; SIZE; ++i) {\n        data[i] = i * 2;\n    }\n\n    \/\/ \u30a2\u30f3\u30ed\u30fc\u30ea\u30f3\u30b0\u3055\u308c\u305f\u30eb\u30fc\u30d7\uff08\u3088\u308a\u52b9\u7387\u7684\uff09\n    for (int i = 0; i &lt; SIZE; i += 4) {\n        data[i] = i * 2;\n        data[i + 1] = (i + 1) * 2;\n        data[i + 2] = (i + 2) * 2;\n        data[i + 3] = (i + 3) * 2;\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001int\u578b\u3092\u4f7f\u7528\u3057\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">int\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56<\/h2>\n\n\n\n<p>\u6574\u6570\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8106\u5f31\u6027\u3084\u30d0\u30b0\u306e\u539f\u56e0\u3068\u306a\u308b\u91cd\u8981\u306a\u554f\u984c\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001int\u578b\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3092\u9632\u3050\u305f\u3081\u306e\u5b9f\u8df5\u7684\u306a\u624b\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u5883\u754c\u5024\u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3092\u9632\u3050\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u5883\u754c\u5024\u30c1\u30a7\u30c3\u30af\u30d1\u30bf\u30fc\u30f3\u3092\u7d39\u4ecb\u3057\u307e\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=\"\">#include &lt;limits&gt;\n#include &lt;stdexcept&gt;\n\nclass SafeInt {\nprivate:\n    int value;\n\npublic:\n    \/\/ \u52a0\u7b97\u6642\u306e\u5b89\u5168\u6027\u30c1\u30a7\u30c3\u30af\n    static bool add_will_overflow(int a, int b) {\n        if (b &gt; 0 &amp;&amp; a &gt; std::numeric_limits&lt;int&gt;::max() - b) return true;\n        if (b &lt; 0 &amp;&amp; a &lt; std::numeric_limits&lt;int&gt;::min() - b) return true;\n        return false;\n    }\n\n    \/\/ \u4e57\u7b97\u6642\u306e\u5b89\u5168\u6027\u30c1\u30a7\u30c3\u30af\n    static bool multiply_will_overflow(int a, int b) {\n        if (a == 0 || b == 0) return false;\n        if (a &gt; 0 &amp;&amp; b &gt; 0) {\n            return a &gt; std::numeric_limits&lt;int&gt;::max() \/ b;\n        }\n        if (a &gt; 0 &amp;&amp; b &lt; 0) {\n            return b &lt; std::numeric_limits&lt;int&gt;::min() \/ a;\n        }\n        if (a &lt; 0 &amp;&amp; b &gt; 0) {\n            return a &lt; std::numeric_limits&lt;int&gt;::min() \/ b;\n        }\n        return (a &lt; 0 &amp;&amp; b &lt; 0) &amp;&amp; (a &lt; std::numeric_limits&lt;int&gt;::max() \/ b);\n    }\n\n    \/\/ \u5b89\u5168\u306a\u52a0\u7b97\u64cd\u4f5c\n    static int safe_add(int a, int b) {\n        if (add_will_overflow(a, b)) {\n            throw std::overflow_error(\"Integer overflow in addition\");\n        }\n        return a + b;\n    }\n\n    \/\/ \u5b89\u5168\u306a\u4e57\u7b97\u64cd\u4f5c\n    static int safe_multiply(int a, int b) {\n        if (multiply_will_overflow(a, b)) {\n            throw std::overflow_error(\"Integer overflow in multiplication\");\n        }\n        return a * b;\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid safe_integer_operations() {\n    try {\n        int result1 = SafeInt::safe_add(\n            std::numeric_limits&lt;int&gt;::max() - 5, \n            10\n        );\n    } catch (const std::overflow_error&amp; e) {\n        std::cerr &lt;&lt; \"Caught overflow: \" &lt;&lt; e.what() &lt;&lt; '\\n';\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u5b89\u5168\u306a\u578b\u5909\u63db\u306e\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u7570\u306a\u308b\u6574\u6570\u578b\u9593\u306e\u5909\u63db\u6642\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56\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=\"\">#include &lt;type_traits&gt;\n\ntemplate&lt;typename To, typename From&gt;\nTo safe_numeric_cast(From value) {\n    static_assert(std::is_integral&lt;From&gt;::value, \"From type must be integral\");\n    static_assert(std::is_integral&lt;To&gt;::value, \"To type must be integral\");\n\n    if (std::is_signed&lt;From&gt;::value == std::is_signed&lt;To&gt;::value) {\n        \/\/ \u540c\u3058\u7b26\u53f7\u578b\u540c\u58eb\u306e\u5909\u63db\n        if (sizeof(From) &lt;= sizeof(To)) {\n            return static_cast&lt;To&gt;(value);  \/\/ \u5b89\u5168\u306a\u5909\u63db\n        }\n    }\n\n    To result = static_cast&lt;To&gt;(value);\n    if (static_cast&lt;From&gt;(result) != value) {\n        throw std::overflow_error(\"Numeric conversion overflow\");\n    }\n\n    if (std::is_signed&lt;From&gt;::value &amp;&amp; !std::is_signed&lt;To&gt;::value) {\n        if (value &lt; 0) {\n            throw std::overflow_error(\"Negative value in conversion to unsigned\");\n        }\n    }\n\n    return result;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid safe_conversion_example() {\n    try {\n        \/\/ int16_t\u304b\u3089uint8_t\u3078\u306e\u5b89\u5168\u306a\u5909\u63db\n        int16_t large_value = 1000;\n        uint8_t small_value = safe_numeric_cast&lt;uint8_t&gt;(large_value);\n    } catch (const std::overflow_error&amp; e) {\n        std::cerr &lt;&lt; \"Conversion error: \" &lt;&lt; e.what() &lt;&lt; '\\n';\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u6570\u5024\u8a08\u7b97\u6642\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u6570\u5024\u8a08\u7b97\u306b\u304a\u3051\u308b\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\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=\"\">#include &lt;cstdint&gt;\n\nclass NumericSafety {\npublic:\n    \/\/ \u9664\u7b97\u6642\u306e\u5b89\u5168\u6027\u30c1\u30a7\u30c3\u30af\n    static bool is_division_safe(int numerator, int denominator) {\n        if (denominator == 0) return false;\n        if (numerator == std::numeric_limits&lt;int&gt;::min() &amp;&amp; \n            denominator == -1) return false;\n        return true;\n    }\n\n    \/\/ \u5270\u4f59\u6f14\u7b97\u306e\u5b89\u5168\u6027\u30c1\u30a7\u30c3\u30af\n    static bool is_modulo_safe(int a, int b) {\n        return b != 0 &amp;&amp; \n               !(a == std::numeric_limits&lt;int&gt;::min() &amp;&amp; b == -1);\n    }\n\n    \/\/ \u914d\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5b89\u5168\u6027\u30c1\u30a7\u30c3\u30af\n    template&lt;typename T&gt;\n    static bool is_index_safe(size_t index, const std::vector&lt;T&gt;&amp; vec) {\n        return index &lt; vec.size();\n    }\n};\n\n\/\/ \u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\nvoid numeric_best_practices() {\n    \/\/ 1. \u9069\u5207\u306a\u578b\u306e\u9078\u629e\n    size_t array_size = 1000;  \/\/ \u914d\u5217\u30b5\u30a4\u30ba\u306b\u306fsize_t\u3092\u4f7f\u7528\n\n    \/\/ 2. \u4e2d\u9593\u7d50\u679c\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56\n    int64_t intermediate = static_cast&lt;int64_t&gt;(a) * b \/ c;  \/\/ \u5927\u304d\u306a\u578b\u3067\u8a08\u7b97\n    int final_result = safe_numeric_cast&lt;int&gt;(intermediate);\n\n    \/\/ 3. \u7b26\u53f7\u306a\u3057\u6574\u6570\u306e\u4f7f\u7528\n    unsigned int counter = 0;  \/\/ \u30ab\u30a6\u30f3\u30bf\u306b\u306f\u7b26\u53f7\u306a\u3057\u6574\u6570\n\n    \/\/ 4. \u5b9a\u6570\u306e\u4f7f\u7528\n    constexpr int MAX_ITERATIONS = 1000000;\n\n    \/\/ 5. \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u306e\u6f14\u7b97\n    if (counter &lt; MAX_ITERATIONS) {\n        counter++;  \/\/ \u5b89\u5168\u306a\u5897\u5206\n    }\n}<\/pre>\n\n\n\n<p>\u5b9f\u88c5\u6642\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e8b\u524d\u30c1\u30a7\u30c3\u30af<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6f14\u7b97\u524d\u306b\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u4f8b\u5916\u3092\u6295\u3052\u308b<\/li>\n\n\n\n<li>\u5883\u754c\u5024\u306e\u30c6\u30b9\u30c8\u3092\u5fd8\u308c\u306a\u3044<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u9078\u629e\u306e\u6ce8\u610f\u70b9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5341\u5206\u306a\u7bc4\u56f2\u3092\u6301\u3064\u578b\u3092\u9078\u629e<\/li>\n\n\n\n<li>\u7b26\u53f7\u4ed8\u304d\/\u7b26\u53f7\u306a\u3057\u306e\u9069\u5207\u306a\u4f7f\u3044\u5206\u3051<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u5927\u304d\u306a\u578b\u3092\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u8a2d\u8a08<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b89\u5168\u306a\u6f14\u7b97\u3092\u5f37\u5236\u3059\u308b\u62bd\u8c61\u5316\u5c64\u306e\u4f5c\u6210<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u660e\u78ba\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">64\u30d3\u30c3\u30c8\u74b0\u5883\u3067\u306eint\u578b\u306e\u6ce8\u610f\u70b9<\/h2>\n\n\n\n<p>64\u30d3\u30c3\u30c8\u74b0\u5883\u3067\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f\u3001int\u578b\u306e\u6271\u3044\u306b\u7279\u6709\u306e\u6ce8\u610f\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u300164\u30d3\u30c3\u30c8\u74b0\u5883\u7279\u6709\u306e\u8ab2\u984c\u3068\u89e3\u6c7a\u7b56\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">ILP64\u3068LP64\u30e2\u30c7\u30eb\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>64\u30d3\u30c3\u30c8\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u7570\u306a\u308b\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u304c\u5b58\u5728\u3057\u3001\u305d\u308c\u305e\u308c\u3067\u6574\u6570\u578b\u306e\u30b5\u30a4\u30ba\u304c\u7570\u306a\u308a\u307e\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=\"\">#include &lt;iostream&gt;\n#include &lt;climits&gt;\n\nvoid data_model_check() {\n    std::cout &lt;&lt; \"Architecture information:\\n\"\n              &lt;&lt; \"sizeof(short): \" &lt;&lt; sizeof(short) &lt;&lt; \"\\n\"\n              &lt;&lt; \"sizeof(int): \" &lt;&lt; sizeof(int) &lt;&lt; \"\\n\"\n              &lt;&lt; \"sizeof(long): \" &lt;&lt; sizeof(long) &lt;&lt; \"\\n\"\n              &lt;&lt; \"sizeof(long long): \" &lt;&lt; sizeof(long long) &lt;&lt; \"\\n\"\n              &lt;&lt; \"sizeof(void*): \" &lt;&lt; sizeof(void*) &lt;&lt; \"\\n\";\n}<\/pre>\n\n\n\n<p>\u4e3b\u306a\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u6bd4\u8f03\uff1a<\/p>\n\n\n<div id=\"id-870de9ff-2ac7-4aa1-8487-fcc3cecc8c05\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e2\u30c7\u30eb<\/th><th>int<\/th><th>long<\/th><th>pointer<\/th><th>\u4e3b\u306a\u4f7f\u7528\u74b0\u5883<\/th><\/tr><\/thead><tbody><tr><td>LP64<\/td><td>32bit<\/td><td>64bit<\/td><td>64bit<\/td><td>Unix\/Linux<\/td><\/tr><tr><td>LLP64<\/td><td>32bit<\/td><td>32bit<\/td><td>64bit<\/td><td>Windows<\/td><\/tr><tr><td>ILP64<\/td><td>64bit<\/td><td>64bit<\/td><td>64bit<\/td><td>\u4e00\u90e8\u306e\u30b9\u30fc\u30d1\u30fc\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u958b\u767a\u3067\u306e\u578b\u9078\u629e\u6226\u7565<\/h3>\n\n\n\n<p>64\u30d3\u30c3\u30c8\u74b0\u5883\u3067\u306e\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u958b\u767a\u306b\u304a\u3051\u308b\u578b\u9078\u629e\u306e\u6226\u7565\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=\"\">#include &lt;cstdint&gt;\n#include &lt;type_traits&gt;\n\nclass CrossPlatformTypes {\npublic:\n    \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u5171\u901a\u306e\u578b\u5b9a\u7fa9\n    using size_type = std::size_t;\n    using difference_type = std::ptrdiff_t;\n    using file_offset = std::int64_t;\n\n    \/\/ \u30dd\u30a4\u30f3\u30bf\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u305f\u6574\u6570\u578b\n    using pointer_int_type = std::conditional&lt;\n        sizeof(void*) == 8,\n        std::int64_t,\n        std::int32_t\n    &gt;::type;\n\n    \/\/ \u5b89\u5168\u306a\u578b\u5909\u63db\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\n    template&lt;typename T&gt;\n    static pointer_int_type to_pointer_int(T* ptr) {\n        return reinterpret_cast&lt;pointer_int_type&gt;(ptr);\n    }\n\n    \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4f9d\u5b58\u306e\u30b5\u30a4\u30ba\u30c1\u30a7\u30c3\u30af\n    static void validate_sizes() {\n        static_assert(sizeof(size_type) == sizeof(void*),\n                     \"size_type must match pointer size\");\n        static_assert(sizeof(pointer_int_type) &gt;= sizeof(void*),\n                     \"pointer_int_type must be large enough\");\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid cross_platform_example() {\n    CrossPlatformTypes::size_type container_size = 1000;\n    std::vector&lt;int&gt; vec(container_size);\n\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u30aa\u30d5\u30bb\u30c3\u30c8\u306e\u51e6\u7406\n    CrossPlatformTypes::file_offset offset = 1LL &lt;&lt; 40; \/\/ 1TB\n\n    \/\/ \u30dd\u30a4\u30f3\u30bf\u6f14\u7b97\n    int* ptr = vec.data();\n    auto ptr_val = CrossPlatformTypes::to_pointer_int(ptr);\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30dd\u30a4\u30f3\u30bf\u3068int\u306e\u76f8\u4e92\u5909\u63db\u306b\u304a\u3051\u308b\u843d\u3068\u3057\u7a74<\/h3>\n\n\n\n<p>64\u30d3\u30c3\u30c8\u74b0\u5883\u3067\u306e\u30dd\u30a4\u30f3\u30bf\u3068int\u578b\u306e\u76f8\u4e92\u5909\u63db\u306b\u306f\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\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=\"\">class PointerIntegerConversion {\npublic:\n    \/\/ \u5371\u967a\u306a\u5909\u63db\u306e\u4f8b\u3068\u5b89\u5168\u306a\u4ee3\u66ff\u624b\u6bb5\n    static void demonstrate_conversion_issues() {\n        \/\/ \u30c7\u30fc\u30bf\u69cb\u9020\u306e\u6e96\u5099\n        std::vector&lt;int&gt; data(1000, 42);\n        int* ptr = data.data();\n\n        \/\/ \u5371\u967a\u306a\u5909\u63db\uff08DON'T\uff09\n        #pragma warning(suppress: 4311 4302)\n        int unsafe_int = reinterpret_cast&lt;int&gt;(ptr);  \/\/ 64bit\u219232bit\u3067\u60c5\u5831\u640d\u5931\n\n        \/\/ \u5b89\u5168\u306a\u5909\u63db\uff08DO\uff09\n        std::uintptr_t safe_uint = reinterpret_cast&lt;std::uintptr_t&gt;(ptr);\n\n        \/\/ \u30dd\u30a4\u30f3\u30bf\u306e\u5dee\u5206\u3092\u5b89\u5168\u306b\u6271\u3046\n        int* ptr1 = &amp;data[0];\n        int* ptr2 = &amp;data[100];\n        std::ptrdiff_t diff = ptr2 - ptr1;  \/\/ \u6b63\u3057\u3044\u5dee\u5206\u306e\u8a08\u7b97\n    }\n\n    \/\/ \u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u8981\u4ef6\u3092\u8003\u616e\u3057\u305f\u30dd\u30a4\u30f3\u30bf\u64cd\u4f5c\n    template&lt;typename T&gt;\n    static T* align_pointer(void* ptr) {\n        std::uintptr_t addr = reinterpret_cast&lt;std::uintptr_t&gt;(ptr);\n        constexpr std::uintptr_t align = alignof(T);\n        addr = (addr + align - 1) &amp; ~(align - 1);\n        return reinterpret_cast&lt;T*&gt;(addr);\n    }\n};\n\n\/\/ 64\u30d3\u30c3\u30c8\u74b0\u5883\u3067\u306e\u914d\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u51e6\u7406\nclass ArrayIndexing {\npublic:\n    template&lt;typename T&gt;\n    static bool is_valid_index(const std::vector&lt;T&gt;&amp; vec, std::size_t index) {\n        \/\/ size_t\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6271\u3046\n        return index &lt; vec.size();\n    }\n\n    template&lt;typename T&gt;\n    static void safe_array_access(std::vector&lt;T&gt;&amp; vec, std::size_t index) {\n        if (is_valid_index(vec, index)) {\n            T&amp; element = vec[index];\n            \/\/ \u5b89\u5168\u306a\u30a2\u30af\u30bb\u30b9\n        } else {\n            throw std::out_of_range(\"Invalid array index\");\n        }\n    }\n};<\/pre>\n\n\n\n<p>64\u30d3\u30c3\u30c8\u74b0\u5883\u3067\u306e\u91cd\u8981\u306a\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>64\u30d3\u30c3\u30c8\u30dd\u30a4\u30f3\u30bf\u306f8\u30d0\u30a4\u30c8\u3092\u6d88\u8cbb<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u30b5\u30a4\u30ba\u304c32\u30d3\u30c3\u30c8\u74b0\u5883\u306e\u500d\u306b\u306a\u308b\u53ef\u80fd\u6027<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u3078\u306e\u5f71\u97ff\u3092\u8003\u616e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8003\u616e\u4e8b\u9805<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30dd\u30a4\u30f3\u30bf\u30b5\u30a4\u30ba\u306e\u5897\u52a0\u306b\u3088\u308b\u30e1\u30e2\u30ea\u5e2f\u57df\u5e45\u3078\u306e\u5f71\u97ff<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30e9\u30a4\u30f3\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528<\/li>\n\n\n\n<li>\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u8981\u4ef6\u306e\u9075\u5b88<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u79fb\u690d\u6027\u306e\u78ba\u4fdd<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4f9d\u5b58\u306e\u30b3\u30fc\u30c9\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u56fa\u5b9a\u5e45\u6574\u6570\u578b\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n\n\n\n<li>\u30dd\u30a4\u30f3\u30bf\u6f14\u7b97\u306e\u5b89\u5168\u306a\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-20\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308bint\u578b\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<p>\u5b9f\u52d9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f\u3001int\u578b\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\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\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u30d3\u30c3\u30c8\u6f14\u7b97\u3092\u4f7f\u3063\u305f\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u30d3\u30c3\u30c8\u6f14\u7b97\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u9ad8\u901f\u3067\u52b9\u7387\u7684\u306a\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\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=\"\">class BitOperations {\npublic:\n    \/\/ \u30d5\u30e9\u30b0\u7ba1\u7406\u306e\u5b9f\u88c5\n    class Flags {\n    private:\n        static constexpr unsigned int READ_FLAG = 1 &lt;&lt; 0;    \/\/ 0000 0001\n        static constexpr unsigned int WRITE_FLAG = 1 &lt;&lt; 1;   \/\/ 0000 0010\n        static constexpr unsigned int EXEC_FLAG = 1 &lt;&lt; 2;    \/\/ 0000 0100\n        unsigned int flags_;\n\n    public:\n        Flags() : flags_(0) {}\n\n        \/\/ \u30d5\u30e9\u30b0\u306e\u8a2d\u5b9a\n        void setRead(bool value) {\n            flags_ = value ? (flags_ | READ_FLAG) : (flags_ &amp; ~READ_FLAG);\n        }\n\n        void setWrite(bool value) {\n            flags_ = value ? (flags_ | WRITE_FLAG) : (flags_ &amp; ~WRITE_FLAG);\n        }\n\n        \/\/ \u30d5\u30e9\u30b0\u306e\u30c1\u30a7\u30c3\u30af\n        bool canRead() const { return flags_ &amp; READ_FLAG; }\n        bool canWrite() const { return flags_ &amp; WRITE_FLAG; }\n    };\n\n    \/\/ 2\u306e\u7d2f\u4e57\u5224\u5b9a\uff08\u30d3\u30c3\u30c8\u6f14\u7b97\u306b\u3088\u308b\u9ad8\u901f\u306a\u5b9f\u88c5\uff09\n    static bool isPowerOfTwo(int n) {\n        return n &gt; 0 &amp;&amp; (n &amp; (n - 1)) == 0;\n    }\n\n    \/\/ \u6700\u3082\u8fd1\u30442\u306e\u7d2f\u4e57\u5024\u3092\u6c42\u3081\u308b\n    static unsigned int nextPowerOfTwo(unsigned int n) {\n        n--;\n        n |= n &gt;&gt; 1;\n        n |= n &gt;&gt; 2;\n        n |= n &gt;&gt; 4;\n        n |= n &gt;&gt; 8;\n        n |= n &gt;&gt; 16;\n        return n + 1;\n    }\n};\n\n\/\/ \u30d3\u30c3\u30c8\u6f14\u7b97\u3092\u4f7f\u3063\u305f\u5b9f\u7528\u7684\u306a\u4f8b\nvoid practical_bit_operations() {\n    BitOperations::Flags permissions;\n    permissions.setRead(true);\n    permissions.setWrite(true);\n\n    \/\/ \u30a2\u30af\u30bb\u30b9\u6a29\u306e\u30c1\u30a7\u30c3\u30af\n    if (permissions.canRead() &amp;&amp; permissions.canWrite()) {\n        \/\/ \u8aad\u307f\u66f8\u304d\u53ef\u80fd\u306a\u51e6\u7406\n    }\n\n    \/\/ 2\u306e\u7d2f\u4e57\u5224\u5b9a\u306e\u4f7f\u7528\u4f8b\n    std::vector&lt;int&gt; values = {16, 18, 32, 40};\n    for (int val : values) {\n        if (BitOperations::isPowerOfTwo(val)) {\n            std::cout &lt;&lt; val &lt;&lt; \" is a power of 2\\n\";\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">STL\u30b3\u30f3\u30c6\u30ca\u3067\u306eint\u578b\u306e\u6700\u9069\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>STL\u30b3\u30f3\u30c6\u30ca\u3067int\u578b\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u30c6\u30af\u30cb\u30c3\u30af\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=\"\">#include &lt;vector&gt;\n#include &lt;unordered_map&gt;\n#include &lt;algorithm&gt;\n\nclass STLIntegerUsage {\npublic:\n    \/\/ \u30d9\u30af\u30c8\u30eb\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\n    static void vector_optimization() {\n        std::vector&lt;int&gt; vec;\n        vec.reserve(1000);  \/\/ \u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u56de\u907f\n\n        \/\/ \u52b9\u7387\u7684\u306a\u8981\u7d20\u8ffd\u52a0\n        for (int i = 0; i &lt; 1000; ++i) {\n            vec.push_back(i);  \/\/ \u518d\u5272\u308a\u5f53\u3066\u304c\u767a\u751f\u3057\u306a\u3044\n        }\n\n        \/\/ \u52b9\u7387\u7684\u306a\u691c\u7d22\n        if (std::binary_search(vec.begin(), vec.end(), 500)) {\n            \/\/ \u8981\u7d20\u304c\u898b\u3064\u304b\u3063\u305f\n        }\n    }\n\n    \/\/ \u30cf\u30c3\u30b7\u30e5\u30de\u30c3\u30d7\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\n    static void hashmap_optimization() {\n        std::unordered_map&lt;int, std::string&gt; map;\n        map.reserve(1000);  \/\/ \u30d0\u30b1\u30c3\u30c8\u6570\u306e\u4e8b\u524d\u78ba\u4fdd\n\n        \/\/ \u30ab\u30b9\u30bf\u30e0\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306e\u5b9a\u7fa9\n        struct IntHash {\n            std::size_t operator()(int key) const {\n                \/\/ \u30b7\u30f3\u30d7\u30eb\u3067\u52b9\u7387\u7684\u306a\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\n                return std::hash&lt;int&gt;{}(key);\n            }\n        };\n    }\n\n    \/\/ \u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\u6761\u4ef6\n    static void custom_sorting() {\n        std::vector&lt;int&gt; numbers = {1, -2, 3, -4, 5};\n\n        \/\/ \u7d76\u5bfe\u5024\u3067\u30bd\u30fc\u30c8\n        std::sort(numbers.begin(), numbers.end(),\n            [](int a, int b) {\n                return std::abs(a) &lt; std::abs(b);\n            }\n        );\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u306a\u5834\u9762\u3067\u306e\u578b\u9078\u629e<\/h3>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u91cd\u8981\u306a\u5834\u9762\u3067\u306e\u9069\u5207\u306a\u578b\u9078\u629e\u3068\u6700\u9069\u5316\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=\"\">class PerformanceCritical {\npublic:\n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u914d\u5217\u64cd\u4f5c\n    static void cache_friendly_array() {\n        constexpr int SIZE = 1024;\n        alignas(64) int array[SIZE];  \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30e9\u30a4\u30f3\u5883\u754c\u306b\u30a2\u30e9\u30a4\u30f3\n\n        \/\/ SIMD\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u30eb\u30fc\u30d7\n        for (int i = 0; i &lt; SIZE; i += 4) {\n            array[i] = i;\n            array[i + 1] = i + 1;\n            array[i + 2] = i + 2;\n            array[i + 3] = i + 3;\n        }\n    }\n\n    \/\/ \u30e1\u30e2\u30ea\u30d7\u30fc\u30eb\u5b9f\u88c5\u3067\u306e\u6574\u6570\u578b\u306e\u4f7f\u7528\n    class MemoryPool {\n        static constexpr size_t BLOCK_SIZE = 4096;\n        static constexpr size_t ALIGNMENT = alignof(std::max_align_t);\n\n        char* memory_;\n        size_t used_;\n\n    public:\n        MemoryPool() : memory_(new char[BLOCK_SIZE]), used_(0) {}\n\n        void* allocate(size_t size) {\n            \/\/ \u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3092\u8003\u616e\u3057\u305f\u30b5\u30a4\u30ba\u8abf\u6574\n            size = (size + ALIGNMENT - 1) &amp; ~(ALIGNMENT - 1);\n            if (used_ + size &gt; BLOCK_SIZE) return nullptr;\n\n            void* ptr = memory_ + used_;\n            used_ += size;\n            return ptr;\n        }\n\n        ~MemoryPool() {\n            delete[] memory_;\n        }\n    };\n\n    \/\/ \u9ad8\u901f\u306a\u6574\u6570\u578b\u5909\u63db\n    template&lt;typename To, typename From&gt;\n    static To fast_cast(From value) {\n        static_assert(sizeof(To) &gt;= sizeof(From),\n                     \"Destination type must be large enough\");\n        return static_cast&lt;To&gt;(value);\n    }\n};<\/pre>\n\n\n\n<p>\u5b9f\u88c5\u6642\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u30c7\u30fc\u30bf\u30ec\u30a4\u30a2\u30a6\u30c8<\/li>\n\n\n\n<li>SIMD\u64cd\u4f5c\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u6700\u9069\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u52b9\u7387<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u6226\u7565<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u30c7\u30fc\u30bf\u69cb\u9020<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30e1\u30e2\u30ea\u30b3\u30d4\u30fc\u306e\u56de\u907f<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b9f\u88c5\u306e\u67d4\u8edf\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u62e1\u5f35\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/li>\n\n\n\n<li>\u518d\u5229\u7528\u53ef\u80fd\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/li>\n\n\n\n<li>\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u69cb\u9020<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-24\">\u4eca\u5f8c\u306eC++\u306b\u304a\u3051\u308bint\u578b\u306e\u5c55\u671b<\/h2>\n\n\n\n<p>C++\u8a00\u8a9e\u306e\u9032\u5316\u3068\u3068\u3082\u306b\u3001\u6574\u6570\u578b\u306e\u6271\u3044\u3082\u9032\u5316\u3092\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u4eca\u5f8c\u306eC++\u306b\u304a\u3051\u308bint\u578b\u306e\u5c55\u671b\u3068\u3001\u305d\u308c\u306b\u5411\u3051\u305f\u6e96\u5099\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">C++23\u4ee5\u964d\u3067\u306e\u6574\u6570\u578b\u306e\u6539\u5584\u63d0\u6848<\/h3>\n\n\n\n<p>C++23\u4ee5\u964d\u3067\u691c\u8a0e\u3055\u308c\u3066\u3044\u308b\u6574\u6570\u578b\u306b\u95a2\u3059\u308b\u4e3b\u306a\u6539\u5584\u63d0\u6848\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=\"\">#include &lt;concepts&gt;\n#include &lt;type_traits&gt;\n\n\/\/ C++23\u4ee5\u964d\u3067\u60f3\u5b9a\u3055\u308c\u308b\u6a5f\u80fd\u306e\u4f8b\u793a\u5b9f\u88c5\nnamespace cpp_future {\n    \/\/ \u5b89\u5168\u306a\u6574\u6570\u578b\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\n    template&lt;typename T&gt;\n    concept SafeInteger = std::integral&lt;T&gt; &amp;&amp; requires(T a, T b) {\n        { a + b } -&gt; std::same_as&lt;T&gt;;\n        { a - b } -&gt; std::same_as&lt;T&gt;;\n        { a * b } -&gt; std::same_as&lt;T&gt;;\n        { a \/ b } -&gt; std::same_as&lt;T&gt;;\n        \/\/ \u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u30c1\u30a7\u30c3\u30af\u304c\u53ef\u80fd\n        requires noexcept(T::checked_add(a, b));\n        requires noexcept(T::checked_multiply(a, b));\n    };\n\n    \/\/ \u5b89\u5168\u306a\u6574\u6570\u578b\u306e\u5b9f\u88c5\u4f8b\n    template&lt;typename T&gt;\n    class safe_integer {\n        T value_;\n\n    public:\n        static safe_integer checked_add(safe_integer a, safe_integer b) {\n            if ((b.value_ &gt; 0 &amp;&amp; a.value_ &gt; std::numeric_limits&lt;T&gt;::max() - b.value_) ||\n                (b.value_ &lt; 0 &amp;&amp; a.value_ &lt; std::numeric_limits&lt;T&gt;::min() - b.value_)) {\n                throw std::overflow_error(\"Addition overflow\");\n            }\n            return safe_integer(a.value_ + b.value_);\n        }\n\n        static safe_integer checked_multiply(safe_integer a, safe_integer b) {\n            \/\/ \u4e57\u7b97\u306e\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u30c1\u30a7\u30c3\u30af\u5b9f\u88c5\n            if (a.value_ &gt; 0 &amp;&amp; b.value_ &gt; 0 &amp;&amp; \n                a.value_ &gt; std::numeric_limits&lt;T&gt;::max() \/ b.value_) {\n                throw std::overflow_error(\"Multiplication overflow\");\n            }\n            return safe_integer(a.value_ * b.value_);\n        }\n    };\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-26\">\u4eca\u5f8c\u306e\u4e92\u63db\u6027\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u65b9\u91dd<\/h3>\n\n\n\n<p>\u5c06\u6765\u306e\u5909\u66f4\u306b\u5099\u3048\u305f\u5b9f\u88c5\u65b9\u91dd\u3068\u5bfe\u7b56\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=\"\">\/\/ \u5c06\u6765\u306e\u62e1\u5f35\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\nclass FutureProofInteger {\npublic:\n    \/\/ \u578b\u306e\u62bd\u8c61\u5316\n    template&lt;typename T&gt;\n    using IntegerType = std::conditional_t&lt;\n        sizeof(T) &lt;= 4,\n        std::int32_t,\n        std::int64_t\n    &gt;;\n\n    \/\/ \u5c06\u6765\u306e\u62e1\u5f35\u3092\u898b\u636e\u3048\u305f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\n    template&lt;typename T&gt;\n    class IntegerWrapper {\n    private:\n        T value_;\n\n    public:\n        \/\/ \u660e\u793a\u7684\u306a\u5909\u63db\u64cd\u4f5c\n        template&lt;typename U&gt;\n        explicit operator U() const {\n            return static_cast&lt;U&gt;(value_);\n        }\n\n        \/\/ \u5c06\u6765\u7684\u306a\u6a5f\u80fd\u62e1\u5f35\u306e\u305f\u3081\u306e\u30d5\u30c3\u30af\n        template&lt;typename Operation&gt;\n        auto perform(Operation op) {\n            return op(value_);\n        }\n    };\n\n    \/\/ \u5c06\u6765\u306e\u6a5f\u80fd\u306b\u5bfe\u3059\u308b\u6e96\u5099\n    struct IntegerTraits {\n        static constexpr bool has_safe_arithmetic = false;\n        static constexpr bool has_extended_range = false;\n        \/\/ \u5c06\u6765\u8ffd\u52a0\u3055\u308c\u308b\u6a5f\u80fd\u306e\u30d5\u30e9\u30b0\n    };\n};\n\n\/\/ \u65b0\u3057\u3044\u6a19\u6e96\u3078\u306e\u79fb\u884c\u3092\u652f\u63f4\u3059\u308b\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\nnamespace migration_helpers {\n    \/\/ \u53e4\u3044\u5b9f\u88c5\u304b\u3089\u65b0\u3057\u3044\u5b9f\u88c5\u3078\u306e\u79fb\u884c\u652f\u63f4\n    template&lt;typename OldType, typename NewType&gt;\n    class TypeMigration {\n    public:\n        static NewType convert(OldType old_value) {\n            \/\/ \u578b\u5909\u63db\u306e\u5b89\u5168\u6027\u30c1\u30a7\u30c3\u30af\n            static_assert(sizeof(NewType) &gt;= sizeof(OldType),\n                         \"New type must be at least as large as old type\");\n            return static_cast&lt;NewType&gt;(old_value);\n        }\n\n        \/\/ \u79fb\u884c\u671f\u9593\u4e2d\u306e\u4e92\u63db\u6027\u30ec\u30a4\u30e4\u30fc\n        static OldType backward_compatible(NewType new_value) {\n            if (new_value &gt; std::numeric_limits&lt;OldType&gt;::max()) {\n                throw std::overflow_error(\"Value too large for backward compatibility\");\n            }\n            return static_cast&lt;OldType&gt;(new_value);\n        }\n    };\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-27\">\u65b0\u3057\u3044\u6574\u6570\u578b\u306e\u5c0e\u5165\u3068\u6226\u7565\u7684\u79fb\u884c<\/h3>\n\n\n\n<p>\u65b0\u3057\u3044\u6574\u6570\u578b\u3078\u306e\u79fb\u884c\u6226\u7565\u3068\u5b9f\u88c5\u4f8b\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=\"\">\/\/ \u5c06\u6765\u7684\u306a\u6574\u6570\u578b\u306e\u5b9f\u88c5\u4f8b\nnamespace future_integers {\n    \/\/ \u62e1\u5f35\u3055\u308c\u305f\u6574\u6570\u578b\u306e\u57fa\u5e95\u30af\u30e9\u30b9\n    template&lt;typename T&gt;\n    class enhanced_integer {\n    protected:\n        T value_;\n\n    public:\n        \/\/ \u57fa\u672c\u7684\u306a\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\n        enhanced_integer&amp; operator+=(const enhanced_integer&amp; other) {\n            \/\/ \u5c06\u6765\u7684\u306a\u5b89\u5168\u6027\u30c1\u30a7\u30c3\u30af\u306e\u305f\u3081\u306e\u30d5\u30c3\u30af\n            check_addition(value_, other.value_);\n            value_ += other.value_;\n            return *this;\n        }\n\n        \/\/ \u5c06\u6765\u7684\u306a\u6a5f\u80fd\u62e1\u5f35\u306e\u305f\u3081\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\n        virtual void check_addition(T a, T b) {\n            \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5b9f\u88c5\n            \/\/ \u5c06\u6765\u7684\u306b\u306f\u3088\u308a\u6d17\u7df4\u3055\u308c\u305f\u5b9f\u88c5\u306b\u7f6e\u304d\u63db\u3048\n        }\n    };\n\n    \/\/ \u65b0\u3057\u3044\u6574\u6570\u578b\u306e\u5b9f\u88c5\u4f8b\n    class safe_int : public enhanced_integer&lt;int&gt; {\n    public:\n        \/\/ \u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u306e\u6f14\u7b97\n        void check_addition(int a, int b) override {\n            if ((b &gt; 0 &amp;&amp; a &gt; std::numeric_limits&lt;int&gt;::max() - b) ||\n                (b &lt; 0 &amp;&amp; a &lt; std::numeric_limits&lt;int&gt;::min() - b)) {\n                throw std::overflow_error(\"Addition overflow\");\n            }\n        }\n    };\n}\n\n\/\/ \u79fb\u884c\u6226\u7565\u306e\u5b9f\u88c5\u4f8b\nclass MigrationStrategy {\npublic:\n    \/\/ \u6bb5\u968e\u7684\u306a\u79fb\u884c\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\n    template&lt;typename OldType, typename NewType&gt;\n    static void migrate_integer_usage(\n        const std::vector&lt;OldType&gt;&amp; old_data,\n        std::vector&lt;NewType&gt;&amp; new_data\n    ) {\n        new_data.reserve(old_data.size());\n        for (const auto&amp; value : old_data) {\n            new_data.push_back(\n                migration_helpers::TypeMigration&lt;OldType, NewType&gt;::convert(value)\n            );\n        }\n    }\n\n    \/\/ \u79fb\u884c\u671f\u9593\u4e2d\u306e\u4e92\u63db\u6027\u7dad\u6301\n    template&lt;typename T&gt;\n    static void ensure_backward_compatibility(T&amp; value) {\n        static_assert(std::is_integral_v&lt;T&gt;,\n                     \"Type must be integral\");\n        \/\/ \u5c06\u6765\u7684\u306a\u4e92\u63db\u6027\u30c1\u30a7\u30c3\u30af\u306e\u305f\u3081\u306e\u30d5\u30c3\u30af\n    }\n};<\/pre>\n\n\n\n<p>\u5c06\u6765\u306b\u5411\u3051\u305f\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b89\u5168\u6027\u306e\u5f37\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u691c\u51fa\u306e\u6a19\u6e96\u5316<\/li>\n\n\n\n<li>\u578b\u5b89\u5168\u6027\u306e\u5411\u4e0a<\/li>\n\n\n\n<li>\u81ea\u52d5\u7684\u306a\u5883\u754c\u30c1\u30a7\u30c3\u30af<\/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>\u3088\u308a\u30a4\u30f3\u30c6\u30ea\u30b8\u30a7\u30f3\u30c8\u306a\u578b\u63a8\u8ad6<\/li>\n\n\n\n<li>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u6700\u9069\u5316\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u6700\u9069\u5316\u306e\u5f37\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e92\u63db\u6027\u306e\u7dad\u6301<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e2\u5b58\u30b3\u30fc\u30c9\u3068\u306e\u4e92\u63db\u6027<\/li>\n\n\n\n<li>\u6bb5\u968e\u7684\u306a\u79fb\u884c\u30d1\u30b9<\/li>\n\n\n\n<li>\u4e0b\u4f4d\u4e92\u63db\u6027\u306e\u4fdd\u8a3c<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5c55\u671b\u3092\u8e0f\u307e\u3048\u3001\u73fe\u5728\u306e\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u3092\u5c06\u6765\u306e\u5909\u66f4\u306b\u5099\u3048\u3066\u6e96\u5099\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\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-2102","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\/2102","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=2102"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2102\/revisions"}],"predecessor-version":[{"id":2103,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2102\/revisions\/2103"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}