{"id":1950,"date":"2025-03-24T08:49:32","date_gmt":"2025-03-23T23:49:32","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1950"},"modified":"2025-03-24T08:49:32","modified_gmt":"2025-03-23T23:49:32","slug":"%e3%80%90c%e5%85%a5%e9%96%80%e3%80%91push_back%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%a8%e5%ae%9f%e8%b7%b5%e3%83%86%e3%82%af%e3%83%8b%e3%83%83%e3%82%af7%e9%81%b8-%e3%83%91%e3%83%95%e3%82%a9","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1950","title":{"rendered":"\u3010C++\u5165\u9580\u3011push_back\u306e\u4f7f\u3044\u65b9\u3068\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af7\u9078 &#8211; \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u65b9\u6cd5\u3082\u89e3\u8aac"},"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\">push_back\u3068\u306f\uff1f\u52b9\u7387\u7684\u306b\u62e1\u5f35\u3059\u308bC++\u306e\u57fa\u672c\u6a5f\u80fd<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">vector\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u95a2\u6570\u3068\u3057\u3066\u306epush_back<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u52d5\u7684\u914d\u5217\u64cd\u4f5c\u306b\u304a\u3051\u308bpush_back\u306e\u5f79\u5272<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">push_back\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3088\u3046<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u57fa\u672c\u7684\u306a\u8981\u7d20\u8ffd\u52a0\u306e\u69cb\u6587\u3068\u4f7f\u7528\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">\u7570\u306a\u308b\u30c7\u30fc\u30bf\u578b\u3067\u306epush_back\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">\u77e5\u3063\u3066\u304a\u304f\u3079\u304dpush_back\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u4ed5\u7d44\u307f\u3068\u5f71\u97ff<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-8\">\u5bb9\u91cf\u7ba1\u7406\u306b\u3088\u308b\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">\u5b9f\u8df5\u3067\u6d3b\u304d\u308b\uff01push_back\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af7\u9078<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">1. \u4e8b\u524d\u306b\u4e88\u7d04\u3092\u4f7f\u3063\u3066\u30e1\u30e2\u30ea\u78ba\u4fdd\u3092\u6700\u9069\u5316<\/a>      <\/li>      <li>        <a href=\"#i-11\">2. emplace_back\u306e\u7121\u8996\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a<\/a>      <\/li>      <li>        <a href=\"#i-12\">3. \u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u56de\u907f\u3067\u30b3\u30d4\u30fc\u30b3\u30b9\u30c8\u3092\u524a\u6e1b<\/a>      <\/li>      <li>        <a href=\"#i-13\">4. \u4f8b\u5916\u5b89\u5168\u6027\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-14\">5. \u30dc\u30fc\u30c0\u30fc\u51e6\u7406\u3067\u306e\u5b89\u5168\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-15\">6. \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">7. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3068\u6700\u9069\u5316\u306e\u624b\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-17\">push_back\u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u4f7f\u3044\u5206\u3051<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">insert\u95a2\u6570\u3068\u306e\u6bd4\u8f03\u3068\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">emplace_back\u3092\u9078\u3076\u9069\u5207\u306a\u72b6\u6cc1\u306e\u5224\u65ad\u57fa\u6e96<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-20\">\u3088\u304f\u3042\u308bpush_back\u306e\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">\u30e1\u30e2\u30ea\u95a2\u9023\u306e\u4e00\u822c\u7684\u306a\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-22\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-23\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076push_back\u306e\u5fdc\u7528<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-24\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-25\">\u30e9\u30b1\u30c3\u30c8\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/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\">push_back\u3068\u306f\uff1f\u52b9\u7387\u7684\u306b\u62e1\u5f35\u3059\u308bC++\u306e\u57fa\u672c\u6a5f\u80fd<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">vector\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u95a2\u6570\u3068\u3057\u3066\u306epush_back<\/h3>\n\n\n\n<p><code>push_back<\/code>\u306f\u3001C++\u306e\u6a19\u6e96\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\uff08STL\uff09\u306b\u304a\u3051\u308b<code>vector<\/code>\u30af\u30e9\u30b9\u306e\u91cd\u8981\u306a\u30e1\u30f3\u30d0\u95a2\u6570\u3067\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u3001\u52d5\u7684\u914d\u5217\u306e\u672b\u5c3e\u306b\u65b0\u3057\u3044\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u969b\u306b\u4f7f\u7528\u3055\u308c\u308b\u57fa\u672c\u7684\u304b\u3064\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/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=\"\">\/\/ vector\u30af\u30e9\u30b9\u3067\u306epush_back\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\n#include &lt;vector&gt;\n\nint main() {\n    std::vector&lt;int&gt; numbers;      \/\/ \u7a7a\u306evector\u3092\u4f5c\u6210\n    numbers.push_back(42);         \/\/ \u672b\u5c3e\u306b42\u3092\u8ffd\u52a0\n    numbers.push_back(100);        \/\/ \u672b\u5c3e\u306b100\u3092\u8ffd\u52a0\n    \/\/ numbers \u306f now [42, 100]\n}<\/pre>\n\n\n\n<p><code>push_back<\/code>\u306e\u4e3b\u306a\u7279\u5fb4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u914d\u5217\u306e\u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u81ea\u52d5\u7684\u306b\u30e1\u30e2\u30ea\u3092\u518d\u5272\u308a\u5f53\u3066<\/li>\n\n\n\n<li>\u8981\u7d20\u306e\u30b3\u30d4\u30fc\u307e\u305f\u306f\u79fb\u52d5\u3092\u5b9f\u884c<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u3092\u4fdd\u8a3c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u52d5\u7684\u914d\u5217\u64cd\u4f5c\u306b\u304a\u3051\u308bpush_back\u306e\u5f79\u5272<\/h3>\n\n\n\n<p><code>push_back<\/code>\u306f\u3001\u52d5\u7684\u914d\u5217\u306e\u7ba1\u7406\u306b\u304a\u3044\u3066\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306a\u30e1\u30e2\u30ea\u7ba1\u7406\u3068\u8981\u7d20\u306e\u8ffd\u52a0\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u52d5\u7684\u306a\u30e1\u30e2\u30ea\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u914d\u5217\u306e\u30b5\u30a4\u30ba\u304c\u4e0d\u8db3\u3057\u305f\u5834\u5408\u3001\u81ea\u52d5\u7684\u306b\u65b0\u3057\u3044\u30e1\u30e2\u30ea\u9818\u57df\u3092\u78ba\u4fdd<\/li>\n\n\n\n<li>\u901a\u5e38\u3001\u5bb9\u91cf\u3092\u500d\u3005\u3067\u5897\u3084\u3059\u3053\u3068\u3067\u3001\u983b\u7e41\u306a\u518d\u5272\u308a\u5f53\u3066\u3092\u56de\u907f<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u4fdd\u8a3c<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8981\u7d20\u306e\u8ffd\u52a0\u304c\u5931\u6557\u3057\u305f\u5834\u5408\u3067\u3082\u3001\u65e2\u5b58\u306e\u30c7\u30fc\u30bf\u306f\u4fdd\u6301<\/li>\n\n\n\n<li>\u5f37\u529b\u306a\u4f8b\u5916\u4fdd\u8a3c\u306b\u3088\u308a\u3001\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u6b62<\/li>\n<\/ul>\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=\"\">\/\/ push_back\u306b\u3088\u308b\u52d5\u7684\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u4f8b\n#include &lt;vector&gt;\n#include &lt;iostream&gt;\n\nint main() {\n    std::vector&lt;int&gt; vec;\n    std::cout &lt;&lt; \"Initial capacity: \" &lt;&lt; vec.capacity() &lt;&lt; std::endl;\n\n    \/\/ \u8981\u7d20\u3092\u8ffd\u52a0\u3057\u3066\u3044\u304f\u3068\u3001\u81ea\u52d5\u7684\u306b\u5bb9\u91cf\u304c\u5897\u52a0\n    for(int i = 0; i &lt; 10; i++) {\n        vec.push_back(i);\n        std::cout &lt;&lt; \"Size: \" &lt;&lt; vec.size() \n                  &lt;&lt; \", Capacity: \" &lt;&lt; vec.capacity() &lt;&lt; std::endl;\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u306e\u30b5\u30dd\u30fc\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff08int, double\u7b49\uff09<\/li>\n\n\n\n<li>\u30af\u30e9\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/li>\n\n\n\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf<\/li>\n\n\n\n<li>\u30ab\u30b9\u30bf\u30e0\u578b<\/li>\n<\/ul>\n\n\n\n<p><code>push_back<\/code>\u306f\u3001\u30e2\u30c0\u30f3\u306aC++\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u52d5\u7684\u914d\u5217\u3092\u6271\u3046\u969b\u306e\u6a19\u6e96\u7684\u306a\u624b\u6cd5\u3068\u3057\u3066\u5e83\u304f\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u4f7f\u3044\u3084\u3059\u3055\u3068\u52b9\u7387\u6027\u304b\u3089\u3001\u7279\u306b\u8981\u7d20\u6570\u304c\u4e8b\u524d\u306b\u5206\u304b\u3089\u306a\u3044\u5834\u5408\u3084\u3001\u30c7\u30fc\u30bf\u3092\u9010\u6b21\u7684\u306b\u8ffd\u52a0\u3057\u3066\u3044\u304f\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306b\u975e\u5e38\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>push_back<\/code>\u306e\u5177\u4f53\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u3001\u52b9\u679c\u7684\u306a\u6d3b\u7528\u306e\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">push_back\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3088\u3046<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u57fa\u672c\u7684\u306a\u8981\u7d20\u8ffd\u52a0\u306e\u69cb\u6587\u3068\u4f7f\u7528\u4f8b<\/h3>\n\n\n\n<p><code>push_back<\/code>\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u304c\u3001\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u3001\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u306e\u30b9\u30c6\u30c3\u30d7\u3092\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/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;string&gt;\n\nint main() {\n    \/\/ \u57fa\u672c\u7684\u306a\u6570\u5024\u306e\u8ffd\u52a0\n    std::vector&lt;int&gt; numbers;\n    numbers.push_back(42);    \/\/ \u5358\u4e00\u306e\u5024\u3092\u8ffd\u52a0\n\n    \/\/ \u5909\u6570\u306e\u5024\u3092\u8ffd\u52a0\n    int value = 100;\n    numbers.push_back(value); \/\/ \u5909\u6570\u306e\u5024\u3092\u8ffd\u52a0\n\n    \/\/ \u30eb\u30fc\u30d7\u5185\u3067\u306e\u8ffd\u52a0\n    for (int i = 1; i &lt;= 5; i++) {\n        numbers.push_back(i); \/\/ \u9023\u7d9a\u3057\u3066\u5024\u3092\u8ffd\u52a0\n    }\n\n    \/\/ \u6587\u5b57\u5217\u306e\u8ffd\u52a0\n    std::vector&lt;std::string&gt; names;\n    names.push_back(\"Alice\");     \/\/ \u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u306e\u8ffd\u52a0\n\n    std::string name = \"Bob\";\n    names.push_back(name);        \/\/ string\u5909\u6570\u306e\u8ffd\u52a0\n    names.push_back(name + \"!\");  \/\/ \u5f0f\u306e\u7d50\u679c\u3092\u8ffd\u52a0\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>\u578b\u306e\u4e00\u81f4\u306b\u6ce8\u610f\u3059\u308b<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u7ba1\u7406\u3092\u610f\u8b58\u3059\u308b<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u7570\u306a\u308b\u30c7\u30fc\u30bf\u578b\u3067\u306epush_back\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p><code>push_back<\/code>\u306f\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u4ee3\u8868\u7684\u306a\u30c7\u30fc\u30bf\u578b\u3067\u306e\u4f7f\u7528\u4f8b\u3092\u793a\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;vector&gt;\n#include &lt;string&gt;\n#include &lt;memory&gt;\n#include &lt;complex&gt;\n\nclass CustomClass {\npublic:\n    CustomClass(int value) : data(value) {}\nprivate:\n    int data;\n};\n\nint main() {\n    \/\/ \u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306e\u4f7f\u7528\n    std::vector&lt;double&gt; doubles;\n    doubles.push_back(3.14);          \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\n\n    \/\/ \u8907\u7d20\u6570\u306e\u4f7f\u7528\n    std::vector&lt;std::complex&lt;double&gt;&gt; complexNums;\n    complexNums.push_back({1.0, 2.0}); \/\/ \u8907\u7d20\u6570\n\n    \/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8ffd\u52a0\n    std::vector&lt;CustomClass&gt; objects;\n    objects.push_back(CustomClass(42)); \/\/ \u30ab\u30b9\u30bf\u30e0\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\n\n    \/\/ \u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528\n    std::vector&lt;std::shared_ptr&lt;int&gt;&gt; smartPtrs;\n    smartPtrs.push_back(std::make_shared&lt;int&gt;(100)); \/\/ shared_ptr\n\n    \/\/ \u30da\u30a2\u3084\u30bf\u30d7\u30eb\u306e\u8ffd\u52a0\n    std::vector&lt;std::pair&lt;int, std::string&gt;&gt; pairs;\n    pairs.push_back({1, \"one\"});      \/\/ \u30d1\u30a2\n\n    \/\/ \u914d\u5217\u3084\u30d9\u30af\u30c8\u30eb\u306e\u30cd\u30b9\u30c8\n    std::vector&lt;std::vector&lt;int&gt;&gt; matrix;\n    matrix.push_back({1, 2, 3});      \/\/ \u30d9\u30af\u30c8\u30eb\u306e\u4e2d\u306b\u30d9\u30af\u30c8\u30eb\n}<\/pre>\n\n\n\n<p>\u30c7\u30fc\u30bf\u578b\u5225\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306e\u5834\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u76f4\u63a5\u5024\u3092\u6e21\u3059\u3053\u3068\u304c\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u578b\u5909\u63db\u306b\u6ce8\u610f\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30af\u30e9\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5834\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30d4\u30fc\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u547c\u3073\u51fa\u3055\u308c\u308b<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u3092\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30dd\u30a4\u30f3\u30bf\u306e\u5834\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u751f\u30dd\u30a4\u30f3\u30bf\u3088\u308a\u3082\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3092\u63a8\u5968<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u7ba1\u7406\u306b\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8907\u5408\u30c7\u30fc\u30bf\u578b\u306e\u5834\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u521d\u671f\u5316\u5b50\u30ea\u30b9\u30c8\u3092\u6d3b\u7528\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u30cd\u30b9\u30c8\u3057\u305f\u69cb\u9020\u3082\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<p>\u9ad8\u5ea6\u306a\u4f7f\u7528\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=\"\">#include &lt;vector&gt;\n#include &lt;functional&gt;\n\nint main() {\n    \/\/ \u95a2\u6570\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u683c\u7d0d\n    std::vector&lt;std::function&lt;int(int)&gt;&gt; functions;\n    functions.push_back([](int x) { return x * 2; });\n\n    \/\/ \u6761\u4ef6\u4ed8\u304d\u8ffd\u52a0\n    std::vector&lt;int&gt; filtered;\n    for (int i = 0; i &lt; 10; i++) {\n        if (i % 2 == 0) {\n            filtered.push_back(i); \/\/ \u5076\u6570\u306e\u307f\u3092\u8ffd\u52a0\n        }\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<code>push_back<\/code>\u306f\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u3084\u72b6\u6cc1\u3067\u67d4\u8edf\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>push_back<\/code>\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">\u77e5\u3063\u3066\u304a\u304f\u3079\u304dpush_back\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u4ed5\u7d44\u307f\u3068\u5f71\u97ff<\/h3>\n\n\n\n<p><code>push_back<\/code>\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u7406\u89e3\u3059\u308b\u4e0a\u3067\u6700\u3082\u91cd\u8981\u306a\u306e\u304c\u3001\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002\u3053\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u306e\u5b9f\u88c5\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/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;iostream&gt;\n#include &lt;chrono&gt;\n\nvoid demonstrate_reallocation() {\n    std::vector&lt;int&gt; vec;\n    size_t last_capacity = vec.capacity();\n\n    \/\/ \u518d\u5272\u308a\u5f53\u3066\u306e\u69d8\u5b50\u3092\u89b3\u5bdf\n    for(int i = 0; i &lt; 100; i++) {\n        vec.push_back(i);\n\n        if(vec.capacity() != last_capacity) {\n            std::cout &lt;&lt; \"Reallocation at size \" &lt;&lt; vec.size() \n                      &lt;&lt; \", new capacity: \" &lt;&lt; vec.capacity() &lt;&lt; std::endl;\n            last_capacity = vec.capacity();\n        }\n    }\n}\n\n\/\/ \u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u30b3\u30b9\u30c8\u3092\u8a08\u6e2c\nvoid measure_reallocation_cost() {\n    std::vector&lt;int&gt; vec;\n    auto start = std::chrono::high_resolution_clock::now();\n\n    for(int i = 0; i &lt; 100000; i++) {\n        vec.push_back(i);\n    }\n\n    auto end = std::chrono::high_resolution_clock::now();\n    auto duration = std::chrono::duration_cast&lt;std::chrono::microseconds&gt;(end - start);\n    std::cout &lt;&lt; \"Time taken: \" &lt;&lt; duration.count() &lt;&lt; \" microseconds\" &lt;&lt; std::endl;\n}<\/pre>\n\n\n\n<p>\u518d\u5272\u308a\u5f53\u3066\u6642\u306e\u4e3b\u306a\u5f71\u97ff\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u30b3\u30d4\u30fc\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e2\u5b58\u306e\u8981\u7d20\u3092\u65b0\u3057\u3044\u30e1\u30e2\u30ea\u9818\u57df\u306b\u30b3\u30d4\u30fc<\/li>\n\n\n\n<li>\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5834\u5408\u3001\u7279\u306b\u9855\u8457\u306a\u5f71\u97ff<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u65ad\u7247\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u983b\u7e41\u306a\u518d\u5272\u308a\u5f53\u3066\u306b\u3088\u308b\u30e1\u30e2\u30ea\u306e\u65ad\u7247\u5316<\/li>\n\n\n\n<li>\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u5b89\u5168\u6027\u3078\u306e\u5f71\u97ff<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u78ba\u4fdd\u5931\u6557\u6642\u306e\u72b6\u614b\u4fdd\u8a3c<\/li>\n\n\n\n<li>\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u51e6\u7406\u306e\u30b3\u30b9\u30c8<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u5bb9\u91cf\u7ba1\u7406\u306b\u3088\u308b\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u5bb9\u91cf\u7ba1\u7406\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\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;vector&gt;\n#include &lt;chrono&gt;\n#include &lt;iostream&gt;\n\nvoid compare_optimization_techniques() {\n    \/\/ 1. \u4e8b\u524d\u306b\u5bb9\u91cf\u3092\u78ba\u4fdd\u3059\u308b\u30b1\u30fc\u30b9\n    {\n        auto start = std::chrono::high_resolution_clock::now();\n        std::vector&lt;int&gt; optimized;\n        optimized.reserve(100000);  \/\/ \u4e8b\u524d\u306b\u5bb9\u91cf\u3092\u78ba\u4fdd\n\n        for(int i = 0; i &lt; 100000; i++) {\n            optimized.push_back(i);\n        }\n\n        auto end = std::chrono::high_resolution_clock::now();\n        auto duration = std::chrono::duration_cast&lt;std::chrono::microseconds&gt;(end - start);\n        std::cout &lt;&lt; \"Optimized: \" &lt;&lt; duration.count() &lt;&lt; \" microseconds\" &lt;&lt; std::endl;\n    }\n\n    \/\/ 2. \u6700\u9069\u5316\u306a\u3057\u306e\u30b1\u30fc\u30b9\n    {\n        auto start = std::chrono::high_resolution_clock::now();\n        std::vector&lt;int&gt; unoptimized;\n\n        for(int i = 0; i &lt; 100000; i++) {\n            unoptimized.push_back(i);\n        }\n\n        auto end = std::chrono::high_resolution_clock::now();\n        auto duration = std::chrono::duration_cast&lt;std::chrono::microseconds&gt;(end - start);\n        std::cout &lt;&lt; \"Unoptimized: \" &lt;&lt; duration.count() &lt;&lt; \" microseconds\" &lt;&lt; std::endl;\n    }\n}<\/pre>\n\n\n\n<p>\u6700\u9069\u5316\u306e\u305f\u3081\u306e\u4e3b\u306a\u30c6\u30af\u30cb\u30c3\u30af\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>reserve()\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e8b\u524d\u306b\u5fc5\u8981\u306a\u5bb9\u91cf\u3092\u78ba\u4fdd<\/li>\n\n\n\n<li>\u518d\u5272\u308a\u5f53\u3066\u306e\u56de\u6570\u3092\u6700\u5c0f\u5316<\/li>\n<\/ul>\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;\n   vec.reserve(1000);  \/\/ 1000\u8981\u7d20\u5206\u306e\u5bb9\u91cf\u3092\u4e8b\u524d\u78ba\u4fdd<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>shrink_to_fit()\u306e\u9069\u5207\u306a\u4f7f\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u8981\u306a\u5bb9\u91cf\u3092\u89e3\u653e<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/li>\n<\/ul>\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=\"\">   vec.shrink_to_fit();  \/\/ \u4f59\u5206\u306a\u5bb9\u91cf\u3092\u89e3\u653e<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u5bb9\u91cf\u5897\u52a0\u7387\u306e\u7406\u89e3<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u901a\u5e38\u3001\u5bb9\u91cf\u306f1.5\u500d\u304b2\u500d\u3067\u5897\u52a0<\/li>\n\n\n\n<li>\u5b9f\u88c5\u4f9d\u5b58\u306e\u6319\u52d5\u3092\u628a\u63e1<\/li>\n<\/ul>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u6307\u91dd\uff1a<\/p>\n\n\n<div id=\"id-82110599-6ce7-431f-8446-173d02b17dba\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u72b6\u6cc1<\/th><th>\u63a8\u5968\u3055\u308c\u308b\u5bfe\u5fdc<\/th><th>\u671f\u5f85\u3055\u308c\u308b\u52b9\u679c<\/th><\/tr><\/thead><tbody><tr><td>\u8981\u7d20\u6570\u304c\u65e2\u77e5<\/td><td>reserve()\u3092\u4f7f\u7528<\/td><td>\u518d\u5272\u308a\u5f53\u3066\u56de\u6570\u306e\u6700\u5c0f\u5316<\/td><\/tr><tr><td>\u30e1\u30e2\u30ea\u5236\u7d04\u3042\u308a<\/td><td>shrink_to_fit()\u3092\u4f7f\u7528<\/td><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/td><\/tr><tr><td>\u8981\u7d20\u306e\u8ffd\u52a0\u304c\u983b\u7e41<\/td><td>\u9069\u5207\u306a\u521d\u671f\u5bb9\u91cf\u8a2d\u5b9a<\/td><td>\u518d\u5272\u308a\u5f53\u3066\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u524a\u6e1b<\/td><\/tr><tr><td>\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/td><td>\u30e0\u30fc\u30d6\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\u306e\u6d3b\u7528<\/td><td>\u30b3\u30d4\u30fc\u30b3\u30b9\u30c8\u306e\u524a\u6e1b<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u6700\u9069\u5316\u3092\u884c\u3046\u3053\u3068\u3067\u3001<code>push_back<\/code>\u3092\u52b9\u7387\u7684\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u5177\u4f53\u7684\u306a\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">\u5b9f\u8df5\u3067\u6d3b\u304d\u308b\uff01push_back\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af7\u9078<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">1. \u4e8b\u524d\u306b\u4e88\u7d04\u3092\u4f7f\u3063\u3066\u30e1\u30e2\u30ea\u78ba\u4fdd\u3092\u6700\u9069\u5316<\/h3>\n\n\n\n<p>\u30e1\u30e2\u30ea\u78ba\u4fdd\u306e\u6700\u9069\u5316\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u91cd\u8981\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u3002<\/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\nclass LargeObject {\n    std::array&lt;char, 1000&gt; data;  \/\/ \u5927\u304d\u306a\u30c7\u30fc\u30bf\u3092\u60f3\u5b9a\npublic:\n    LargeObject() = default;\n};\n\n\/\/ \u6700\u9069\u5316\u524d\u3068\u5f8c\u306e\u6bd4\u8f03\nvoid compare_memory_optimization() {\n    const size_t ELEMENTS = 10000;\n\n    \/\/ \u6700\u9069\u5316\u524d\n    auto start = std::chrono::high_resolution_clock::now();\n    std::vector&lt;LargeObject&gt; v1;\n    for (size_t i = 0; i &lt; ELEMENTS; ++i) {\n        v1.push_back(LargeObject());\n    }\n    auto end1 = std::chrono::high_resolution_clock::now();\n\n    \/\/ \u6700\u9069\u5316\u5f8c\n    auto start2 = std::chrono::high_resolution_clock::now();\n    std::vector&lt;LargeObject&gt; v2;\n    v2.reserve(ELEMENTS);  \/\/ \u4e8b\u524d\u306b\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\n    for (size_t i = 0; i &lt; ELEMENTS; ++i) {\n        v2.push_back(LargeObject());\n    }\n    auto end2 = std::chrono::high_resolution_clock::now();\n\n    \/\/ \u5b9f\u884c\u6642\u9593\u306e\u6bd4\u8f03\n    auto duration1 = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end1 - start).count();\n    auto duration2 = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end2 - start2).count();\n\n    std::cout &lt;&lt; \"Without reserve: \" &lt;&lt; duration1 &lt;&lt; \"ms\\n\";\n    std::cout &lt;&lt; \"With reserve: \" &lt;&lt; duration2 &lt;&lt; \"ms\\n\";\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">2. emplace_back\u306e\u7121\u8996\u3067\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a<\/h3>\n\n\n\n<p>emplace_back\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4e0d\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30d4\u30fc\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/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;string&gt;\n\nclass Customer {\npublic:\n    Customer(std::string n, int a) : name(n), age(a) {}\nprivate:\n    std::string name;\n    int age;\n};\n\nvoid demonstrate_emplace_optimization() {\n    std::vector&lt;Customer&gt; customers;\n\n    \/\/ \u975e\u52b9\u7387\u306a\u65b9\u6cd5\n    Customer temp(\"John\", 30);\n    customers.push_back(temp);  \/\/ \u30b3\u30d4\u30fc\u304c\u767a\u751f\n\n    \/\/ \u3088\u308a\u52b9\u7387\u7684\u306a\u65b9\u6cd5\n    customers.emplace_back(\"John\", 30);  \/\/ \u76f4\u63a5\u69cb\u7bc9\n\n    \/\/ \u6761\u4ef6\u4ed8\u304d\u8ffd\u52a0\u306e\u4f8b\n    auto add_if_valid = [](std::vector&lt;Customer&gt;&amp; vec, const std::string&amp; name, int age) {\n        if (age &gt;= 0 &amp;&amp; !name.empty()) {\n            vec.emplace_back(name, age);\n            return true;\n        }\n        return false;\n    };\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">3. \u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u56de\u907f\u3067\u30b3\u30d4\u30fc\u30b3\u30b9\u30c8\u3092\u524a\u6e1b<\/h3>\n\n\n\n<p>\u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6539\u5584\u3067\u304d\u307e\u3059\u3002<\/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;memory&gt;\n\nclass ExpensiveObject {\npublic:\n    ExpensiveObject(int val) : data(val) {}\n    \/\/ \u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u60f3\u5b9a\n    std::vector&lt;int&gt; data;\n};\n\nvoid optimize_temporary_objects() {\n    std::vector&lt;std::unique_ptr&lt;ExpensiveObject&gt;&gt; objects;\n\n    \/\/ \u975e\u52b9\u7387\u306a\u65b9\u6cd5\n    \/\/ auto temp = std::make_unique&lt;ExpensiveObject&gt;(42);\n    \/\/ objects.push_back(std::move(temp));  \/\/ \u4f59\u5206\u306a\u79fb\u52d5\u304c\u767a\u751f\n\n    \/\/ \u52b9\u7387\u7684\u306a\u65b9\u6cd5\n    objects.push_back(std::make_unique&lt;ExpensiveObject&gt;(42));  \/\/ \u76f4\u63a5\u69cb\u7bc9\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">4. \u4f8b\u5916\u5b89\u5168\u6027\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3067\u3082\u30ea\u30bd\u30fc\u30b9\u30ea\u30fc\u30af\u3092\u9632\u3050\u5b9f\u88c5\u304c\u91cd\u8981\u3067\u3059\u3002<\/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;stdexcept&gt;\n\nclass ResourceHandler {\n    std::vector&lt;std::unique_ptr&lt;Resource&gt;&gt; resources;\npublic:\n    void add_resource(std::unique_ptr&lt;Resource&gt; resource) {\n        try {\n            \/\/ \u4f8b\u5916\u5b89\u5168\u306a\u5b9f\u88c5\n            resources.push_back(std::move(resource));\n        } catch (...) {\n            \/\/ \u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\u3092\u78ba\u5b9f\u306b\u884c\u3046\n            if (resource) {\n                \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u8a18\u9332\u306a\u3069\u306e\u51e6\u7406\n            }\n            throw;  \/\/ \u4f8b\u5916\u3092\u518d\u9001\u51fa\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">5. \u30dc\u30fc\u30c0\u30fc\u51e6\u7406\u3067\u306e\u5b89\u5168\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5883\u754c\u6761\u4ef6\u3067\u306e\u5b89\u5168\u306a\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u30d0\u30b0\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/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;optional&gt;\n\ntemplate&lt;typename T&gt;\nclass SafeVector {\n    std::vector&lt;T&gt; data;\n    size_t max_size;\npublic:\n    SafeVector(size_t max = std::numeric_limits&lt;size_t&gt;::max()) \n        : max_size(max) {}\n\n    std::optional&lt;std::string&gt; safe_push_back(const T&amp; value) {\n        if (data.size() &gt;= max_size) {\n            return \"Vector size limit reached\";\n        }\n\n        try {\n            data.push_back(value);\n            return std::nullopt;\n        } catch (const std::exception&amp; e) {\n            return std::string(\"Error: \") + e.what();\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">6. \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>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3068\u9069\u5207\u306a\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/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;memory&gt;\n\nclass Resource {\npublic:\n    Resource(int id) : id_(id) {}\n    ~Resource() {\n        \/\/ \u30ea\u30bd\u30fc\u30b9\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n    }\nprivate:\n    int id_;\n};\n\nclass ResourceManager {\n    std::vector&lt;std::shared_ptr&lt;Resource&gt;&gt; resources;\npublic:\n    void add_resource(int id) {\n        resources.push_back(std::make_shared&lt;Resource&gt;(id));\n    }\n\n    void remove_resource(int id) {\n        resources.erase(\n            std::remove_if(resources.begin(), resources.end(),\n                [id](const auto&amp; res) { \n                    return res-&gt;get_id() == id; \n                }),\n            resources.end()\n        );\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">7. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3068\u6700\u9069\u5316\u306e\u624b\u6cd5<\/h3>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u7d99\u7d9a\u7684\u306b\u76e3\u8996\u3057\u3001\u6700\u9069\u5316\u3059\u308b\u65b9\u6cd5\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/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#include &lt;algorithm&gt;\n\ntemplate&lt;typename T&gt;\nclass MonitoredVector {\n    std::vector&lt;T&gt; data;\n    std::vector&lt;double&gt; push_back_times;\n\npublic:\n    void push_back(const T&amp; value) {\n        auto start = std::chrono::high_resolution_clock::now();\n\n        size_t old_capacity = data.capacity();\n        data.push_back(value);\n\n        auto end = std::chrono::high_resolution_clock::now();\n        auto duration = std::chrono::duration_cast&lt;std::chrono::microseconds&gt;(end - start);\n\n        push_back_times.push_back(duration.count());\n\n        \/\/ \u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u5909\u66f4\u306e\u691c\u51fa\n        if (data.capacity() &gt; old_capacity) {\n            std::cout &lt;&lt; \"Capacity increased from \" &lt;&lt; old_capacity \n                      &lt;&lt; \" to \" &lt;&lt; data.capacity() &lt;&lt; std::endl;\n        }\n    }\n\n    \/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7d71\u8a08\u306e\u53d6\u5f97\n    void print_performance_stats() {\n        if (push_back_times.empty()) return;\n\n        double avg = std::accumulate(push_back_times.begin(), \n                                   push_back_times.end(), 0.0) \/ push_back_times.size();\n\n        auto [min, max] = std::minmax_element(push_back_times.begin(), \n                                            push_back_times.end());\n\n        std::cout &lt;&lt; \"Performance Statistics:\\n\"\n                  &lt;&lt; \"Average push_back time: \" &lt;&lt; avg &lt;&lt; \"\u00b5s\\n\"\n                  &lt;&lt; \"Min push_back time: \" &lt;&lt; *min &lt;&lt; \"\u00b5s\\n\"\n                  &lt;&lt; \"Max push_back time: \" &lt;&lt; *max &lt;&lt; \"\u00b5s\\n\";\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001push_back\u3068\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u4f7f\u3044\u5206\u3051\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-17\">push_back\u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u4f7f\u3044\u5206\u3051<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">insert\u95a2\u6570\u3068\u306e\u6bd4\u8f03\u3068\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3<\/h3>\n\n\n\n<p>vector\u30af\u30e9\u30b9\u306b\u306f\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u305f\u3081\u306e\u8907\u6570\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u9078\u629e\u304c\u91cd\u8981\u3067\u3059\u3002<\/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#include &lt;iostream&gt;\n\n\/\/ \u5404\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\nvoid compare_insertion_methods() {\n    const int NUM_ELEMENTS = 10000;\n    std::vector&lt;int&gt; vec;\n    vec.reserve(NUM_ELEMENTS);  \/\/ \u516c\u5e73\u306a\u6bd4\u8f03\u306e\u305f\u3081\u4e8b\u524d\u306b\u9818\u57df\u78ba\u4fdd\n\n    \/\/ 1. push_back\u306b\u3088\u308b\u672b\u5c3e\u3078\u306e\u8ffd\u52a0\n    auto start1 = std::chrono::high_resolution_clock::now();\n    for (int i = 0; i &lt; NUM_ELEMENTS; ++i) {\n        vec.push_back(i);\n    }\n    auto end1 = std::chrono::high_resolution_clock::now();\n    vec.clear();\n\n    \/\/ 2. insert\u306b\u3088\u308b\u5148\u982d\u3078\u306e\u8ffd\u52a0\n    auto start2 = std::chrono::high_resolution_clock::now();\n    for (int i = 0; i &lt; NUM_ELEMENTS; ++i) {\n        vec.insert(vec.begin(), i);\n    }\n    auto end2 = std::chrono::high_resolution_clock::now();\n    vec.clear();\n\n    \/\/ 3. insert\u306b\u3088\u308b\u4e2d\u9593\u4f4d\u7f6e\u3078\u306e\u8ffd\u52a0\n    auto start3 = std::chrono::high_resolution_clock::now();\n    for (int i = 0; i &lt; NUM_ELEMENTS; ++i) {\n        vec.insert(vec.begin() + vec.size() \/ 2, i);\n    }\n    auto end3 = std::chrono::high_resolution_clock::now();\n\n    \/\/ \u5b9f\u884c\u6642\u9593\u306e\u6bd4\u8f03\n    auto duration1 = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end1 - start1);\n    auto duration2 = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end2 - start2);\n    auto duration3 = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end3 - start3);\n\n    std::cout &lt;&lt; \"push_back time: \" &lt;&lt; duration1.count() &lt;&lt; \"ms\\n\";\n    std::cout &lt;&lt; \"insert at beginning: \" &lt;&lt; duration2.count() &lt;&lt; \"ms\\n\";\n    std::cout &lt;&lt; \"insert at middle: \" &lt;&lt; duration3.count() &lt;&lt; \"ms\\n\";\n}<\/pre>\n\n\n\n<p>\u5404\u30e1\u30bd\u30c3\u30c9\u306e\u7279\u5fb4\u3068\u4f7f\u3044\u5206\u3051\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>push_back<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u672b\u5c3e\u3078\u306e\u8ffd\u52a0\u306b\u6700\u9069<\/li>\n\n\n\n<li>\u511f\u5374\u5b9a\u6570\u6642\u9593 O(1)<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u53ef\u80fd\u6027\u3042\u308a<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>insert<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4efb\u610f\u306e\u4f4d\u7f6e\u306b\u633f\u5165\u53ef\u80fd<\/li>\n\n\n\n<li>\u633f\u5165\u4f4d\u7f6e\u4ee5\u964d\u306e\u8981\u7d20\u3092\u30b7\u30d5\u30c8\u3059\u308b\u5fc5\u8981\u3042\u308a<\/li>\n\n\n\n<li>\u4f4d\u7f6e\u306b\u5fdc\u3058\u3066O(n)\u306e\u6642\u9593\u8a08\u7b97\u91cf<\/li>\n<\/ul>\n\n\n\n<p>\u4f7f\u3044\u5206\u3051\u306e\u57fa\u6e96\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=\"\">std::vector&lt;int&gt; vec;\n\n\/\/ 1. \u672b\u5c3e\u3078\u306e\u8ffd\u52a0 \u2192 push_back\nvec.push_back(42);  \/\/ \u6700\u3082\u52b9\u7387\u7684\n\n\/\/ 2. \u5148\u982d\u3078\u306e\u8ffd\u52a0\u304c\u983b\u7e41\u306a\u5834\u5408 \u2192 std::deque \u306e\u4f7f\u7528\u3092\u691c\u8a0e\nstd::deque&lt;int&gt; deque;\ndeque.push_front(42);  \/\/ \u52b9\u7387\u7684\u306a\u5148\u982d\u8ffd\u52a0\n\n\/\/ 3. \u9806\u5e8f\u3092\u4fdd\u6301\u3057\u306a\u304c\u3089\u306e\u633f\u5165 \u2192 insert\nauto it = std::lower_bound(vec.begin(), vec.end(), 42);\nvec.insert(it, 42);  \/\/ \u30bd\u30fc\u30c8\u9806\u3092\u7dad\u6301<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">emplace_back\u3092\u9078\u3076\u9069\u5207\u306a\u72b6\u6cc1\u306e\u5224\u65ad\u57fa\u6e96<\/h3>\n\n\n\n<p>emplace_back\u306f\u7279\u5b9a\u306e\u72b6\u6cc1\u3067 push_back \u3088\u308a\u3082\u52b9\u7387\u7684\u3067\u3059\u304c\u3001\u5e38\u306b\u305d\u3046\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002<\/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;string&gt;\n\nclass ComplexObject {\npublic:\n    ComplexObject(std::string s, int n) : str(s), num(n) {}\nprivate:\n    std::string str;\n    int num;\n};\n\nvoid demonstrate_emplace_scenarios() {\n    std::vector&lt;ComplexObject&gt; vec;\n\n    \/\/ 1. \u76f4\u63a5\u69cb\u7bc9\u304c\u53ef\u80fd\u306a\u5834\u5408 \u2192 emplace_back\n    vec.emplace_back(\"hello\", 42);  \/\/ \u5f15\u6570\u304b\u3089\u76f4\u63a5\u69cb\u7bc9\n\n    \/\/ 2. \u65e2\u5b58\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30d4\u30fc\u304c\u5fc5\u8981\u306a\u5834\u5408 \u2192 push_back\n    ComplexObject obj(\"world\", 100);\n    vec.push_back(obj);  \/\/ \u65e2\u5b58\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30d4\u30fc\n\n    \/\/ 3. \u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\n    vec.push_back(ComplexObject(\"temp\", 200));  \/\/ \u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u306b\u3088\u308a\u52b9\u7387\u7684\n\n    \/\/ 4. \u53ef\u5909\u5f15\u6570\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408 \u2192 emplace_back\n    struct VariadicObject {\n        template&lt;typename... Args&gt;\n        VariadicObject(Args&amp;&amp;... args) {}\n    };\n    std::vector&lt;VariadicObject&gt; vec2;\n    vec2.emplace_back(1, \"text\", 3.14);  \/\/ \u53ef\u5909\u5f15\u6570\u3092\u76f4\u63a5\u8ee2\u9001\n}<\/pre>\n\n\n\n<p>\u9078\u629e\u57fa\u6e96\u306e\u307e\u3068\u3081\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>push_back\u3092\u9078\u3076\u5834\u5408<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e2\u5b58\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30d4\u30fc\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u578b\u304c\u57fa\u672c\u30c7\u30fc\u30bf\u578b<\/li>\n\n\n\n<li>\u30b3\u30d4\u30fc\u7701\u7565\u304c\u52b9\u304f\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>emplace_back\u3092\u9078\u3076\u5834\u5408<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5f15\u6570\u304b\u3089\u76f4\u63a5\u69cb\u7bc9<\/li>\n\n\n\n<li>\u53ef\u5909\u5f15\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u30b3\u30d4\u30fc\/\u30e0\u30fc\u30d6\u30b3\u30b9\u30c8\u304c\u9ad8\u3044\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>insert\u3092\u9078\u3076\u5834\u5408<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7279\u5b9a\u306e\u4f4d\u7f6e\u306b\u633f\u5165\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u9806\u5e8f\u3092\u4fdd\u6301\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/li>\n\n\n\n<li>\u8907\u6570\u8981\u7d20\u306e\u540c\u6642\u633f\u5165<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u4f7f\u3044\u5206\u3051\u3092\u9069\u5207\u306b\u884c\u3046\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4e21\u7acb\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u969b\u306e\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-20\">\u3088\u304f\u3042\u308bpush_back\u306e\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u30e1\u30e2\u30ea\u95a2\u9023\u306e\u4e00\u822c\u7684\u306a\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/h3>\n\n\n\n<p>push_back\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u30e1\u30e2\u30ea\u95a2\u9023\u306e\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/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;memory&gt;\n#include &lt;iostream&gt;\n\n\/\/ \u554f\u984c1: \u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u7121\u52b9\u5316\nvoid demonstrate_iterator_invalidation() {\n    std::vector&lt;int&gt; numbers = {1, 2, 3};\n\n    \/\/ \u5371\u967a\u306a\u30b3\u30fc\u30c9\n    for (auto it = numbers.begin(); it != numbers.end(); ++it) {\n        if (*it == 2) {\n            numbers.push_back(4);  \/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u304c\u7121\u52b9\u5316\u3055\u308c\u308b\uff01\n            \/\/ \u4ee5\u964d\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u64cd\u4f5c\u306f\u672a\u5b9a\u7fa9\u52d5\u4f5c\n        }\n    }\n\n    \/\/ \u5b89\u5168\u306a\u5b9f\u88c5\n    size_t size = numbers.size();\n    for (size_t i = 0; i &lt; size; ++i) {\n        if (numbers[i] == 2) {\n            numbers.push_back(4);  \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u6709\u52b9\u306a\u307e\u307e\n        }\n    }\n}\n\n\/\/ \u554f\u984c2: \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\nclass Resource {\npublic:\n    Resource(int id) : id_(id) {\n        std::cout &lt;&lt; \"Resource \" &lt;&lt; id_ &lt;&lt; \" created\\n\";\n    }\n    ~Resource() {\n        std::cout &lt;&lt; \"Resource \" &lt;&lt; id_ &lt;&lt; \" destroyed\\n\";\n    }\nprivate:\n    int id_;\n};\n\nvoid demonstrate_memory_leak_prevention() {\n    std::vector&lt;Resource*&gt; resources;\n\n    \/\/ \u5371\u967a\u306a\u30b3\u30fc\u30c9\n    try {\n        for (int i = 0; i &lt; 5; ++i) {\n            Resource* r = new Resource(i);\n            resources.push_back(r);  \/\/ push_back\u4e2d\u306b\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\n        }\n    } catch (...) {\n        \/\/ \u30ea\u30bd\u30fc\u30b9\u304c\u30ea\u30fc\u30af\u3059\u308b\n    }\n\n    \/\/ \u5b89\u5168\u306a\u5b9f\u88c5\n    std::vector&lt;std::unique_ptr&lt;Resource&gt;&gt; safe_resources;\n    try {\n        for (int i = 0; i &lt; 5; ++i) {\n            safe_resources.push_back(std::make_unique&lt;Resource&gt;(i));\n        }\n    } catch (...) {\n        \/\/ unique_ptr\u304c\u81ea\u52d5\u7684\u306b\u30ea\u30bd\u30fc\u30b9\u3092\u89e3\u653e\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h3>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u554f\u984c\u3068\u305d\u306e\u8a3a\u65ad\u30fb\u89e3\u6c7a\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/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#include &lt;iostream&gt;\n\nclass PerformanceMonitor {\npublic:\n    static void start() {\n        start_time = std::chrono::high_resolution_clock::now();\n    }\n\n    static double stop() {\n        auto end_time = std::chrono::high_resolution_clock::now();\n        auto duration = std::chrono::duration_cast&lt;std::chrono::microseconds&gt;\n            (end_time - start_time);\n        return duration.count() \/ 1000.0;  \/\/ \u30df\u30ea\u79d2\u306b\u5909\u63db\n    }\n\nprivate:\n    static std::chrono::time_point&lt;std::chrono::high_resolution_clock&gt; start_time;\n};\n\nstd::chrono::time_point&lt;std::chrono::high_resolution_clock&gt; \n    PerformanceMonitor::start_time;\n\n\/\/ \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\u4f8b\u3068\u305d\u306e\u6539\u5584\nvoid demonstrate_performance_issues() {\n    const int NUM_ELEMENTS = 100000;\n\n    \/\/ \u554f\u984c1: \u983b\u7e41\u306a\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\n    {\n        std::vector&lt;int&gt; vec;\n        PerformanceMonitor::start();\n\n        for (int i = 0; i &lt; NUM_ELEMENTS; ++i) {\n            vec.push_back(i);  \/\/ \u983b\u7e41\u306a\u518d\u5272\u308a\u5f53\u3066\u304c\u767a\u751f\n        }\n\n        double time1 = PerformanceMonitor::stop();\n        std::cout &lt;&lt; \"Without reserve: \" &lt;&lt; time1 &lt;&lt; \"ms\\n\";\n    }\n\n    \/\/ \u6539\u55841: \u9069\u5207\u306a\u30e1\u30e2\u30ea\u4e88\u7d04\n    {\n        std::vector&lt;int&gt; vec;\n        vec.reserve(NUM_ELEMENTS);  \/\/ \u4e8b\u524d\u306b\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\n\n        PerformanceMonitor::start();\n        for (int i = 0; i &lt; NUM_ELEMENTS; ++i) {\n            vec.push_back(i);\n        }\n\n        double time2 = PerformanceMonitor::stop();\n        std::cout &lt;&lt; \"With reserve: \" &lt;&lt; time2 &lt;&lt; \"ms\\n\";\n    }\n\n    \/\/ \u554f\u984c2: \u4e0d\u8981\u306a\u30b3\u30d4\u30fc\n    struct LargeObject {\n        std::array&lt;int, 1000&gt; data;\n    };\n\n    {\n        std::vector&lt;LargeObject&gt; vec;\n        vec.reserve(100);\n\n        PerformanceMonitor::start();\n        for (int i = 0; i &lt; 100; ++i) {\n            LargeObject obj;  \/\/ \u4e00\u6642\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\n            vec.push_back(obj);  \/\/ \u30b3\u30d4\u30fc\u304c\u767a\u751f\n        }\n\n        double time3 = PerformanceMonitor::stop();\n        std::cout &lt;&lt; \"With copying: \" &lt;&lt; time3 &lt;&lt; \"ms\\n\";\n    }\n\n    \/\/ \u6539\u55842: emplace_back\u306e\u4f7f\u7528\n    {\n        std::vector&lt;LargeObject&gt; vec;\n        vec.reserve(100);\n\n        PerformanceMonitor::start();\n        for (int i = 0; i &lt; 100; ++i) {\n            vec.emplace_back();  \/\/ \u76f4\u63a5\u69cb\u7bc9\n        }\n\n        double time4 = PerformanceMonitor::stop();\n        std::cout &lt;&lt; \"With emplace_back: \" &lt;&lt; time4 &lt;&lt; \"ms\\n\";\n    }\n}\n\n\/\/ \u30c7\u30d0\u30c3\u30b0\u7528\u306e\u30d8\u30eb\u30d1\u30fc\u30af\u30e9\u30b9\ntemplate&lt;typename T&gt;\nclass DebugVector : public std::vector&lt;T&gt; {\npublic:\n    void push_back(const T&amp; value) {\n        size_t old_capacity = this-&gt;capacity();\n        std::vector&lt;T&gt;::push_back(value);\n\n        if (this-&gt;capacity() &gt; old_capacity) {\n            std::cout &lt;&lt; \"Capacity increased from \" &lt;&lt; old_capacity \n                      &lt;&lt; \" to \" &lt;&lt; this-&gt;capacity() &lt;&lt; \"\\n\";\n        }\n\n        std::cout &lt;&lt; \"Size: \" &lt;&lt; this-&gt;size() \n                  &lt;&lt; \", Capacity: \" &lt;&lt; this-&gt;capacity() &lt;&lt; \"\\n\";\n    }\n};<\/pre>\n\n\n\n<p>\u4e3b\u306a\u554f\u984c\u3068\u5bfe\u7b56\u306e\u307e\u3068\u3081\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u7121\u52b9\u5316\u5bfe\u7b56<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30d9\u30fc\u30b9\u306e\u30a2\u30af\u30bb\u30b9\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u5fc5\u8981\u306a\u8981\u7d20\u3092\u4e00\u6642\u914d\u5217\u306b\u4fdd\u5b58<\/li>\n\n\n\n<li>\u64cd\u4f5c\u9806\u5e8f\u306e\u898b\u76f4\u3057<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u9632\u6b62<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>RAII\u539f\u5247\u306e\u9075\u5b88<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u306e\u4f5c\u6210<\/li>\n<\/ul>\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>reserve()\u306b\u3088\u308b\u4e8b\u524d\u30e1\u30e2\u30ea\u78ba\u4fdd<\/li>\n\n\n\n<li>emplace_back\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u306e\u524a\u6e1b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/strong>:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ab\u30b9\u30bf\u30e0\u30c7\u30d0\u30c3\u30ac\u30fc\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u8ffd\u8de1<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u554f\u984c\u306b\u5bfe\u3059\u308b\u7406\u89e3\u3068\u9069\u5207\u306a\u5bfe\u7b56\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5b89\u5b9a\u3057\u305f\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-23\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076push_back\u306e\u5fdc\u7528<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u4f7f\u3048\u308b\u3001\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u5b9f\u88c5\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/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;string&gt;\n#include &lt;memory&gt;\n#include &lt;chrono&gt;\n#include &lt;algorithm&gt;\n#include &lt;iostream&gt;\n\n\/\/ \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u305f\u3081\u306e\u6700\u9069\u5316\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ca\ntemplate&lt;typename T&gt;\nclass OptimizedContainer {\nprivate:\n    std::vector&lt;T&gt; data;\n    size_t batch_size;\n    std::vector&lt;T&gt; batch_buffer;\n\npublic:\n    explicit OptimizedContainer(size_t batch_size = 1000) \n        : batch_size(batch_size) {\n        \/\/ \u4e88\u60f3\u3055\u308c\u308b\u4f7f\u7528\u91cf\u306b\u57fa\u3065\u3044\u3066\u30e1\u30e2\u30ea\u3092\u4e8b\u524d\u78ba\u4fdd\n        data.reserve(batch_size * 10);\n        batch_buffer.reserve(batch_size);\n    }\n\n    \/\/ \u30d0\u30c3\u30c1\u51e6\u7406\u306b\u3088\u308b\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u8ffd\u52a0\n    void add(const T&amp; item) {\n        batch_buffer.push_back(item);\n\n        if (batch_buffer.size() &gt;= batch_size) {\n            flush_batch();\n        }\n    }\n\n    \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u51e6\u7406\n    void flush_batch() {\n        if (batch_buffer.empty()) return;\n\n        \/\/ \u30d0\u30c3\u30d5\u30a1\u5185\u306e\u30c7\u30fc\u30bf\u3092\u4e00\u62ec\u3067\u8ffd\u52a0\n        data.insert(data.end(), \n                   std::make_move_iterator(batch_buffer.begin()),\n                   std::make_move_iterator(batch_buffer.end()));\n\n        batch_buffer.clear();\n    }\n\n    \/\/ \u30b3\u30f3\u30c6\u30ca\u306e\u6700\u9069\u5316\n    void optimize() {\n        flush_batch();\n        data.shrink_to_fit();\n    }\n\n    \/\/ \u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u7528\u30e1\u30bd\u30c3\u30c9\n    const std::vector&lt;T&gt;&amp; get_data() const {\n        return data;\n    }\n};\n\n\/\/ \u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\uff1a\u30ed\u30b0\u30c7\u30fc\u30bf\u306e\u51e6\u7406\nstruct LogEntry {\n    std::chrono::system_clock::time_point timestamp;\n    std::string message;\n    int level;\n\n    LogEntry(const std::string&amp; msg, int lvl) \n        : timestamp(std::chrono::system_clock::now())\n        , message(msg)\n        , level(lvl) {}\n};\n\nclass LogProcessor {\nprivate:\n    OptimizedContainer&lt;LogEntry&gt; logs;\n\npublic:\n    void process_log(const std::string&amp; message, int level) {\n        logs.add(LogEntry(message, level));\n    }\n\n    void analyze_logs() {\n        logs.flush_batch();  \/\/ \u6b8b\u308a\u306e\u30ed\u30b0\u3092\u30d5\u30e9\u30c3\u30b7\u30e5\n        const auto&amp; all_logs = logs.get_data();\n\n        \/\/ \u30ed\u30b0\u30ec\u30d9\u30eb\u3054\u3068\u306e\u96c6\u8a08\n        std::vector&lt;int&gt; level_counts(4, 0);\n        for (const auto&amp; log : all_logs) {\n            if (log.level &gt;= 0 &amp;&amp; log.level &lt; 4) {\n                level_counts[log.level]++;\n            }\n        }\n\n        \/\/ \u96c6\u8a08\u7d50\u679c\u306e\u51fa\u529b\n        std::cout &lt;&lt; \"Log Analysis:\\n\";\n        for (int i = 0; i &lt; 4; ++i) {\n            std::cout &lt;&lt; \"Level \" &lt;&lt; i &lt;&lt; \": \" \n                      &lt;&lt; level_counts[i] &lt;&lt; \" entries\\n\";\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u30e9\u30b1\u30c3\u30c8\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u9ad8\u6027\u80fd\u304c\u8981\u6c42\u3055\u308c\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u5b9f\u88c5\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/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#include &lt;thread&gt;\n#include &lt;mutex&gt;\n#include &lt;condition_variable&gt;\n\n\/\/ \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30c7\u30fc\u30bf\u30d0\u30c3\u30d5\u30a1\ntemplate&lt;typename T&gt;\nclass ThreadSafeBuffer {\nprivate:\n    std::vector&lt;T&gt; buffer;\n    std::mutex mutex;\n    std::condition_variable not_full;\n    std::condition_variable not_empty;\n    size_t capacity;\n\npublic:\n    explicit ThreadSafeBuffer(size_t max_size = 1000) \n        : capacity(max_size) {\n        buffer.reserve(capacity);\n    }\n\n    \/\/ \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u8981\u7d20\u8ffd\u52a0\n    void push(const T&amp; item) {\n        std::unique_lock&lt;std::mutex&gt; lock(mutex);\n        not_full.wait(lock, [this] { \n            return buffer.size() &lt; capacity; \n        });\n\n        buffer.push_back(item);\n        lock.unlock();\n        not_empty.notify_one();\n    }\n\n    \/\/ \u30d0\u30c3\u30c1\u51e6\u7406\u306b\u3088\u308b\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u53d6\u308a\u51fa\u3057\n    std::vector&lt;T&gt; take_batch(size_t max_items) {\n        std::unique_lock&lt;std::mutex&gt; lock(mutex);\n        not_empty.wait(lock, [this] { \n            return !buffer.empty(); \n        });\n\n        size_t items_to_take = std::min(max_items, buffer.size());\n        std::vector&lt;T&gt; result;\n        result.reserve(items_to_take);\n\n        auto start = buffer.begin();\n        auto end = buffer.begin() + items_to_take;\n        result.insert(result.end(), \n                     std::make_move_iterator(start),\n                     std::make_move_iterator(end));\n\n        buffer.erase(start, end);\n        lock.unlock();\n        not_full.notify_one();\n\n        return result;\n    }\n};\n\n\/\/ \u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\uff1a\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30c7\u30fc\u30bf\u51e6\u7406\nclass RealTimeDataProcessor {\nprivate:\n    ThreadSafeBuffer&lt;double&gt; data_buffer;\n    std::atomic&lt;bool&gt; running{true};\n    std::thread processor_thread;\n\n    void process_loop() {\n        while (running) {\n            auto batch = data_buffer.take_batch(100);\n            if (!batch.empty()) {\n                \/\/ \u30d0\u30c3\u30c1\u51e6\u7406\u3092\u5b9f\u884c\n                process_batch(batch);\n            }\n            std::this_thread::sleep_for(std::chrono::milliseconds(10));\n        }\n    }\n\n    void process_batch(const std::vector&lt;double&gt;&amp; batch) {\n        \/\/ \u30c7\u30fc\u30bf\u306e\u7d71\u8a08\u51e6\u7406\n        double sum = 0.0;\n        double max_value = batch[0];\n        double min_value = batch[0];\n\n        for (const auto&amp; value : batch) {\n            sum += value;\n            max_value = std::max(max_value, value);\n            min_value = std::min(min_value, value);\n        }\n\n        double average = sum \/ batch.size();\n\n        \/\/ \u7d71\u8a08\u60c5\u5831\u306e\u51fa\u529b\uff08\u5b9f\u969b\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u306a\u3069\uff09\n        std::cout &lt;&lt; \"Batch Statistics:\\n\"\n                  &lt;&lt; \"Average: \" &lt;&lt; average &lt;&lt; \"\\n\"\n                  &lt;&lt; \"Min: \" &lt;&lt; min_value &lt;&lt; \"\\n\"\n                  &lt;&lt; \"Max: \" &lt;&lt; max_value &lt;&lt; \"\\n\";\n    }\n\npublic:\n    RealTimeDataProcessor() \n        : processor_thread(&amp;RealTimeDataProcessor::process_loop, this) {}\n\n    ~RealTimeDataProcessor() {\n        running = false;\n        processor_thread.join();\n    }\n\n    void add_data(double value) {\n        data_buffer.push(value);\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u304b\u3089\u5b66\u3079\u308b\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u52b9\u7387\u7684\u306a\u30e1\u30e2\u30ea\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d0\u30c3\u30c1\u51e6\u7406\u306b\u3088\u308b\u6700\u9069\u5316<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30e1\u30e2\u30ea\u4e88\u7d04<\/li>\n\n\n\n<li>\u30b9\u30de\u30fc\u30c8\u306a\u5bb9\u91cf\u7ba1\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u306b\u3088\u308b\u540c\u671f<\/li>\n\n\n\n<li>\u6761\u4ef6\u5909\u6570\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n\n\n\n<li>\u30d0\u30c3\u30d5\u30a1\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u9632\u6b62<\/li>\n<\/ul>\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>\u30d0\u30c3\u30c1\u51e6\u7406\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u79fb\u52d5\u306e\u6700\u5c0f\u5316<\/li>\n\n\n\n<li>\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u9078\u629e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4fdd\u5b88\u6027\u3068\u62e1\u5f35\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e2\u30b8\u30e5\u30e9\u30fc\u306a\u8a2d\u8a08<\/li>\n\n\n\n<li>\u660e\u78ba\u306a\u30a8\u30e9\u30fc\u51e6\u7406<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u62bd\u8c61\u5316\u30ec\u30d9\u30eb<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u906d\u9047\u3059\u308b\u69d8\u3005\u306a\u8981\u4ef6\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u67d4\u8edf\u6027\u3068\u52b9\u7387\u6027\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u81ea\u8eab\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5408\u308f\u305b\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u3066\u6d3b\u7528\u3057\u3066\u304f\u3060\u3055\u3044\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-1950","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\/1950","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=1950"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1950\/revisions"}],"predecessor-version":[{"id":1951,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1950\/revisions\/1951"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}