{"id":2143,"date":"2025-03-24T08:48:11","date_gmt":"2025-03-23T23:48:11","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2143"},"modified":"2025-03-24T08:48:37","modified_gmt":"2025-03-23T23:48:37","slug":"%e5%88%9d%e5%bf%83%e8%80%85%e3%81%a7%e3%82%82%e3%82%8f%e3%81%8b%e3%82%8b%ef%bc%81c%e3%81%a7%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e5%87%ba%e5%8a%9b%e3%82%92%e5%ae%9f%e8%a3%85%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2143","title":{"rendered":"\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\uff01C++\u3067\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u3092\u5b9f\u88c5\u3059\u308b\u5b8c\u5168\u30ac\u30a4\u30c9\u3010\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u4ed8\u304d\u3011"},"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++\u3067\u306e\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u304c\u5fc5\u8981\u306a\u30b1\u30fc\u30b9\u3068\u4e3b\u306a\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">C++\u306b\u304a\u3051\u308b\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u57fa\u672c\u6982\u5ff5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">ofstream\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">ofstream\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u3068\u521d\u671f\u5316<\/a>      <\/li>      <li>        <a href=\"#i-5\">\u57fa\u672c\u7684\u306a\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u51fa\u529b\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-6\">\u30d5\u30a1\u30a4\u30eb\u3092\u78ba\u5b9f\u306b\u30af\u30ed\u30fc\u30ba\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u578b\u306e\u51fa\u529b\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">\u6570\u5024\u30c7\u30fc\u30bf\u306e\u51fa\u529b\u65b9\u6cd5\u3068\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-9\">\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51fa\u529b\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-10\">\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u306e\u51fa\u529b\u65b9\u6cd5\u3068\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-11\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-12\">\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u4f8b\u5916\u51e6\u7406\u3092\u4f7f\u7528\u3057\u305f\u5805\u7262\u306a\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-15\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u305f\u9ad8\u901f\u5316\u624b\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-17\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u305f\u3081\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">\u4e26\u5217\u51e6\u7406\u3092\u6d3b\u7528\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u6700\u9069\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-19\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3068\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">CSV\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-21\">\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-22\">\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5b9f\u88c5\u4f8b<\/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++\u3067\u306e\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u304c\u5fc5\u8981\u306a\u30b1\u30fc\u30b9\u3068\u4e3b\u306a\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<p>C++\u3067\u306e\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u7d50\u679c\u3084\u30c7\u30fc\u30bf\u3092\u6c38\u7d9a\u7684\u306b\u4fdd\u5b58\u3059\u308b\u969b\u306b\u4e0d\u53ef\u6b20\u306a\u6a5f\u80fd\u3067\u3059\u3002\u4e3b\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u306e\u6c38\u7d9a\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u7d42\u4e86\u5f8c\u3082\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u6b21\u56de\u8d77\u52d5\u6642\u306b\u30c7\u30fc\u30bf\u3092\u518d\u5229\u7528\u53ef\u80fd<\/li>\n\n\n\n<li>\u30b7\u30b9\u30c6\u30e0\u30af\u30e9\u30c3\u30b7\u30e5\u6642\u306e\u30c7\u30fc\u30bf\u5fa9\u65e7\u306b\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ed\u30b0\u51fa\u529b<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u52d5\u4f5c\u5c65\u6b74\u3092\u8a18\u9332<\/li>\n\n\n\n<li>\u30c7\u30d0\u30c3\u30b0\u3084\u969c\u5bb3\u8abf\u67fb\u306b\u6d3b\u7528<\/li>\n\n\n\n<li>\u30b7\u30b9\u30c6\u30e0\u306e\u76e3\u8996\u3084\u5206\u6790\u306b\u5229\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u4f5c\u6210<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u8a2d\u5b9a\u3092\u5916\u90e8\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u4fdd\u5b58<\/li>\n\n\n\n<li>\u8a2d\u5b9a\u306e\u5909\u66f4\u304c\u5bb9\u6613<\/li>\n\n\n\n<li>\u8907\u6570\u306e\u8a2d\u5b9a\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u7ba1\u7406\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u30a8\u30af\u30b9\u30dd\u30fc\u30c8<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u306e\u30c7\u30fc\u30bf\u9023\u643a<\/li>\n\n\n\n<li>\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u4f5c\u6210<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u306e\u53ef\u8996\u5316\u3084\u5206\u6790\u306b\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">C++\u306b\u304a\u3051\u308b\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u57fa\u672c\u6982\u5ff5<\/h3>\n\n\n\n<p>C++\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u4e3b\u306b\u4ee5\u4e0b\u306e\u8981\u7d20\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u30af\u30e9\u30b9<br>C++\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u305f\u3081\u306e\u5f37\u529b\u306a\u30b9\u30c8\u30ea\u30fc\u30e0\u30af\u30e9\u30b9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\uff1a<\/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;fstream&gt;  \/\/ \u30d5\u30a1\u30a4\u30eb\u5165\u51fa\u529b\u306b\u5fc5\u8981\u306a\u30d8\u30c3\u30c0\n\n\/\/ \u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u7528\u306eofstream\u30af\u30e9\u30b9\nstd::ofstream output_file(\"example.txt\");\n\n\/\/ \u30d0\u30a4\u30ca\u30ea\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5834\u5408\nstd::ofstream binary_file(\"data.bin\", std::ios::binary);<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u51fa\u529b\u30e2\u30fc\u30c9<br>\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u969b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u51fa\u529b\u30e2\u30fc\u30c9\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\uff1a<\/li>\n<\/ol>\n\n\n<div id=\"id-4535d765-08e4-4fe5-a66c-f1fae7207e8f\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e2\u30fc\u30c9<\/th><th>\u8aac\u660e<\/th><th>\u4f7f\u7528\u4f8b<\/th><\/tr><\/thead><tbody><tr><td><code>ios::out<\/code><\/td><td>\u901a\u5e38\u306e\u51fa\u529b\u30e2\u30fc\u30c9\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09<\/td><td><code>ofstream file(\"test.txt\")<\/code><\/td><\/tr><tr><td><code>ios::app<\/code><\/td><td>\u8ffd\u8a18\u30e2\u30fc\u30c9<\/td><td><code>ofstream file(\"log.txt\", ios::app)<\/code><\/td><\/tr><tr><td><code>ios::binary<\/code><\/td><td>\u30d0\u30a4\u30ca\u30ea\u30e2\u30fc\u30c9<\/td><td><code>ofstream file(\"data.bin\", ios::binary)<\/code><\/td><\/tr><tr><td><code>ios::trunc<\/code><\/td><td>\u30d5\u30a1\u30a4\u30eb\u3092\u65b0\u898f\u4f5c\u6210\uff08\u65e2\u5b58\u5185\u5bb9\u3092\u524a\u9664\uff09<\/td><td><code>ofstream file(\"new.txt\", ios::trunc)<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u51fa\u529b\u64cd\u4f5c\u5b50<br>\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5f62\u5f0f\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306e\u64cd\u4f5c\u5b50\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/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;iomanip&gt;  \/\/ \u64cd\u4f5c\u5b50\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\n\nofstream file(\"format.txt\");\nfile &lt;&lt; std::fixed;  \/\/ \u56fa\u5b9a\u5c0f\u6570\u70b9\u8868\u793a\nfile &lt;&lt; std::setprecision(2);  \/\/ \u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\nfile &lt;&lt; std::setw(10);  \/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u5e4510\u6587\u5b57<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0<br>C++\u306e\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3092\u884c\u3044\u307e\u3059\uff1a<\/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=\"\">ofstream file(\"buffer.txt\");\nfile.rdbuf()-&gt;pubsetbuf(nullptr, 0);  \/\/ \u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3092\u7121\u52b9\u5316\n\/\/ \u307e\u305f\u306f\nfile.rdbuf()-&gt;pubsetbuf(buffer, size);  \/\/ \u30ab\u30b9\u30bf\u30e0\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u3092\u8a2d\u5b9a<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001C++\u3067\u306e\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u57fa\u790e\u304c\u8eab\u306b\u3064\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u6d3b\u7528\u3057\u305f\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">ofstream\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">ofstream\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u3068\u521d\u671f\u5316<\/h3>\n\n\n\n<p>ofstream\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u57fa\u672c\u7684\u306a\u624b\u9806\u3092\u3001\u5b9f\u88c5\u4f8b\u3068\u3068\u3082\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u30d5\u30a1\u30a4\u30eb\u30aa\u30fc\u30d7\u30f3<\/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;fstream&gt;\n#include &lt;string&gt;\n\nint main() {\n    \/\/ \u57fa\u672c\u7684\u306a\u30d5\u30a1\u30a4\u30eb\u30aa\u30fc\u30d7\u30f3\n    std::ofstream file(\"output.txt\");\n\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u304c\u6b63\u5e38\u306b\u30aa\u30fc\u30d7\u30f3\u3055\u308c\u305f\u304b\u78ba\u8a8d\n    if (!file) {\n        std::cerr &lt;&lt; \"\u30d5\u30a1\u30a4\u30eb\u3092\u30aa\u30fc\u30d7\u30f3\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\" &lt;&lt; std::endl;\n        return 1;\n    }\n\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\n    file &lt;&lt; \"Hello, World!\" &lt;&lt; std::endl;\n\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308b\n    file.close();\n    return 0;\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u69d8\u3005\u306a\u30aa\u30fc\u30d7\u30f3\u30e2\u30fc\u30c9\u306e\u4f7f\u7528<\/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=\"\">\/\/ \u8ffd\u8a18\u30e2\u30fc\u30c9\u3067\u30aa\u30fc\u30d7\u30f3\nstd::ofstream append_file(\"log.txt\", std::ios::app);\n\n\/\/ \u30d0\u30a4\u30ca\u30ea\u30e2\u30fc\u30c9\u3067\u30aa\u30fc\u30d7\u30f3\nstd::ofstream binary_file(\"data.bin\", std::ios::binary);\n\n\/\/ \u65e2\u5b58\u30d5\u30a1\u30a4\u30eb\u3092\u5207\u308a\u8a70\u3081\u3066\u65b0\u898f\u4f5c\u6210\nstd::ofstream trunc_file(\"new.txt\", std::ios::trunc);\n\n\/\/ \u8907\u6570\u306e\u30e2\u30fc\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\nstd::ofstream combined_file(\"output.bin\", std::ios::binary | std::ios::app);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u57fa\u672c\u7684\u306a\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u51fa\u529b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u51fa\u529b\u306b\u306f\u3001\u69d8\u3005\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u51fa\u529b<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::ofstream file(\"data.txt\");\n\n\/\/ \u57fa\u672c\u7684\u306a\u30c7\u30fc\u30bf\u578b\u306e\u51fa\u529b\nint number = 42;\nstd::string text = \"Hello\";\ndouble value = 3.14;\n\nfile &lt;&lt; \"Number: \" &lt;&lt; number &lt;&lt; std::endl;\nfile &lt;&lt; \"Text: \" &lt;&lt; text &lt;&lt; std::endl;\nfile &lt;&lt; \"Value: \" &lt;&lt; value &lt;&lt; std::endl;<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u66f8\u5f0f\u5316\u3055\u308c\u305f\u51fa\u529b<\/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;iomanip&gt;\n\nstd::ofstream file(\"formatted.txt\");\n\n\/\/ \u6570\u5024\u306e\u66f8\u5f0f\u8a2d\u5b9a\nfile &lt;&lt; std::fixed &lt;&lt; std::setprecision(2);\nfile &lt;&lt; std::setw(10) &lt;&lt; std::right &lt;&lt; 123.456 &lt;&lt; std::endl;\n\n\/\/ \u6587\u5b57\u5217\u306e\u66f8\u5f0f\u8a2d\u5b9a\nfile &lt;&lt; std::setw(20) &lt;&lt; std::left &lt;&lt; \"Header\" &lt;&lt; std::endl;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30d5\u30a1\u30a4\u30eb\u3092\u78ba\u5b9f\u306b\u30af\u30ed\u30fc\u30ba\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30eb\u306e\u9069\u5207\u306a\u30af\u30ed\u30fc\u30ba\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u63a8\u5968\u3055\u308c\u308b\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>RAII\u3092\u6d3b\u7528\u3057\u305f\u81ea\u52d5\u30af\u30ed\u30fc\u30ba<\/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=\"\">void writeData() {\n    \/\/ \u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u308b\u3068\u81ea\u52d5\u7684\u306b\u30af\u30ed\u30fc\u30ba\u3055\u308c\u308b\n    std::ofstream file(\"data.txt\");\n    if (file) {\n        file &lt;&lt; \"\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u307f\" &lt;&lt; std::endl;\n    }\n    \/\/ \u3053\u3053\u3067\u30d5\u30a1\u30a4\u30eb\u306f\u81ea\u52d5\u7684\u306b\u30af\u30ed\u30fc\u30ba\u3055\u308c\u308b\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>try-catch\u30d6\u30ed\u30c3\u30af\u3067\u306e\u78ba\u5b9f\u306a\u30af\u30ed\u30fc\u30ba<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::ofstream file;\ntry {\n    file.open(\"data.txt\");\n    \/\/ \u30d5\u30a1\u30a4\u30eb\u3078\u306e\u66f8\u304d\u8fbc\u307f\u51e6\u7406\n    file &lt;&lt; \"\u91cd\u8981\u306a\u30c7\u30fc\u30bf\" &lt;&lt; std::endl;\n    file.close();\n} catch (const std::exception&amp; e) {\n    if (file.is_open()) {\n        file.close();\n    }\n    throw; \/\/ \u4f8b\u5916\u3092\u518d\u30b9\u30ed\u30fc\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3092\u6d3b\u7528\u3057\u305f\u65b9\u6cd5<\/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;memory&gt;\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u30c7\u30ea\u30fc\u30bf\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u78ba\u5b9f\u306b\u30af\u30ed\u30fc\u30ba\nauto closeFile = [](std::ofstream* f) {\n    if (f-&gt;is_open()) {\n        f-&gt;close();\n    }\n    delete f;\n};\n\nstd::unique_ptr&lt;std::ofstream, decltype(closeFile)&gt; file(\n    new std::ofstream(\"data.txt\"), closeFile);\n\nif (file-&gt;is_open()) {\n    *file &lt;&lt; \"\u5b89\u5168\u306a\u66f8\u304d\u8fbc\u307f\" &lt;&lt; std::endl;\n}\n\/\/ \u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u308b\u3068\u81ea\u52d5\u7684\u306b\u30af\u30ed\u30fc\u30ba\u3055\u308c\u308b<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u65b9\u6cd5\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u5177\u4f53\u7684\u306a\u30c7\u30fc\u30bf\u578b\u306e\u51fa\u529b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-7\">\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u578b\u306e\u51fa\u529b\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u6570\u5024\u30c7\u30fc\u30bf\u306e\u51fa\u529b\u65b9\u6cd5\u3068\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a<\/h3>\n\n\n\n<p>\u6570\u5024\u30c7\u30fc\u30bf\u3092\u51fa\u529b\u3059\u308b\u969b\u306f\u3001\u9069\u5207\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u69d8\u3005\u306a\u6570\u5024\u30c7\u30fc\u30bf\u306e\u51fa\u529b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6574\u6570\u578b\u30c7\u30fc\u30bf\u306e\u51fa\u529b<\/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;fstream&gt;\n#include &lt;iomanip&gt;\n\nstd::ofstream file(\"numbers.txt\");\n\n\/\/ \u57fa\u672c\u7684\u306a\u6574\u6570\u51fa\u529b\nint normal_int = 42;\nfile &lt;&lt; normal_int &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 42\n\n\/\/ \u9032\u6570\u306e\u5909\u66f4\nfile &lt;&lt; std::hex &lt;&lt; normal_int &lt;&lt; std::endl;  \/\/ 16\u9032\u6570\u51fa\u529b: 2a\nfile &lt;&lt; std::oct &lt;&lt; normal_int &lt;&lt; std::endl;  \/\/ 8\u9032\u6570\u51fa\u529b: 52\nfile &lt;&lt; std::dec;  \/\/ 10\u9032\u6570\u306b\u623b\u3059\n\n\/\/ \u5e45\u6307\u5b9a\u30680\u57cb\u3081\nfile &lt;&lt; std::setw(5) &lt;&lt; std::setfill('0') &lt;&lt; normal_int &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 00042<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u51fa\u529b<\/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=\"\">double pi = 3.14159265359;\nfloat e = 2.71828f;\n\n\/\/ \u7cbe\u5ea6\u6307\u5b9a\nfile &lt;&lt; std::fixed &lt;&lt; std::setprecision(2) &lt;&lt; pi &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 3.14\nfile &lt;&lt; std::scientific &lt;&lt; e &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 2.72e+00\n\n\/\/ \u6841\u6570\u3068\u4f4d\u7f6e\u63c3\u3048\nfile &lt;&lt; std::setw(10) &lt;&lt; std::right &lt;&lt; pi &lt;&lt; std::endl;  \/\/ \u53f3\u63c3\u3048\nfile &lt;&lt; std::setw(10) &lt;&lt; std::left &lt;&lt; pi &lt;&lt; std::endl;   \/\/ \u5de6\u63c3\u3048<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u51fa\u529b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u51fa\u529b\u3059\u308b\u305f\u3081\u306e\u69d8\u3005\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u6587\u5b57\u5217\u51fa\u529b<\/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;string&gt;\n\nstd::string text = \"Hello, World!\";\nstd::ofstream file(\"strings.txt\");\n\n\/\/ \u76f4\u63a5\u51fa\u529b\nfile &lt;&lt; text &lt;&lt; std::endl;\n\n\/\/ \u6587\u5b57\u5217\u306e\u9023\u7d50\u3068\u51fa\u529b\nfile &lt;&lt; \"Prefix: \" &lt;&lt; text &lt;&lt; \" :Suffix\" &lt;&lt; std::endl;\n\n\/\/ \u8907\u6570\u884c\u306e\u6587\u5b57\u5217\nfile &lt;&lt; \"Line 1\\n\"\n        \"Line 2\\n\"\n        \"Line 3\" &lt;&lt; std::endl;<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u5927\u91cf\u306e\u6587\u5b57\u5217\u3092\u52b9\u7387\u7684\u306b\u51fa\u529b<\/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=\"\">\/\/ \u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u3092\u6700\u9069\u5316\nchar buffer[8192];\nfile.rdbuf()-&gt;pubsetbuf(buffer, sizeof(buffer));\n\n\/\/ \u6587\u5b57\u5217\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u4f7f\u7528\u3057\u305f\u4e00\u62ec\u51fa\u529b\nstd::stringstream ss;\nfor (const auto&amp; str : large_string_array) {\n    ss &lt;&lt; str &lt;&lt; '\\n';\n}\nfile &lt;&lt; ss.str();<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u306e\u51fa\u529b\u65b9\u6cd5\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u51fa\u529b\u3059\u308b\u969b\u306f\u3001\u7279\u5225\u306a\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u30d0\u30a4\u30ca\u30ea\u51fa\u529b<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::ofstream file(\"data.bin\", std::ios::binary);\n\n\/\/ \u69cb\u9020\u4f53\u306e\u5b9a\u7fa9\nstruct Record {\n    int id;\n    double value;\n    char name[50];\n};\n\n\/\/ \u69cb\u9020\u4f53\u306e\u30d0\u30a4\u30ca\u30ea\u51fa\u529b\nRecord record = {1, 3.14, \"Sample\"};\nfile.write(reinterpret_cast&lt;const char*&gt;(&amp;record), sizeof(Record));\n\n\/\/ \u914d\u5217\u306e\u30d0\u30a4\u30ca\u30ea\u51fa\u529b\nint array[] = {1, 2, 3, 4, 5};\nfile.write(reinterpret_cast&lt;const char*&gt;(array), sizeof(array));<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4e92\u63db\u6027\u3092\u8003\u616e\u3057\u305f\u30d0\u30a4\u30ca\u30ea\u51fa\u529b<\/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=\"\">\/\/ \u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u8003\u616e\nvoid writeInt32(std::ofstream&amp; file, uint32_t value) {\n    \/\/ \u30ea\u30c8\u30eb\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u3067\u51fa\u529b\n    char bytes[4];\n    bytes[0] = value &amp; 0xFF;\n    bytes[1] = (value &gt;&gt; 8) &amp; 0xFF;\n    bytes[2] = (value &gt;&gt; 16) &amp; 0xFF;\n    bytes[3] = (value &gt;&gt; 24) &amp; 0xFF;\n    file.write(bytes, 4);\n}\n\n\/\/ \u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u8003\u616e\u3057\u305f\u69cb\u9020\u4f53\u306e\u51fa\u529b\n#pragma pack(push, 1)  \/\/ \u30d1\u30c7\u30a3\u30f3\u30b0\u3092\u7121\u52b9\u5316\nstruct PackedRecord {\n    int32_t id;\n    double value;\n    char name[50];\n};\n#pragma pack(pop)\n\nvoid writeRecord(std::ofstream&amp; file, const PackedRecord&amp; record) {\n    \/\/ \u30e1\u30f3\u30d0\u3054\u3068\u306b\u500b\u5225\u306b\u66f8\u304d\u51fa\u3057\n    writeInt32(file, record.id);\n    file.write(reinterpret_cast&lt;const char*&gt;(&amp;record.value), sizeof(double));\n    file.write(record.name, sizeof(record.name));\n}<\/pre>\n\n\n\n<p>\u30d0\u30a4\u30ca\u30ea\u51fa\u529b\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\uff08\u30d0\u30a4\u30c8\u9806\uff09\u306e\u9055\u3044\u3092\u8003\u616e\u3059\u308b<\/li>\n\n\n\n<li>\u69cb\u9020\u4f53\u306e\u30d1\u30c7\u30a3\u30f3\u30b0\u306b\u6ce8\u610f\u3059\u308b<\/li>\n\n\n\n<li>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u9593\u3067\u306e\u30c7\u30fc\u30bf\u578b\u30b5\u30a4\u30ba\u306e\u9055\u3044\u3092\u8003\u616e\u3059\u308b<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30eb\u30aa\u30fc\u30d7\u30f3\u6642\u306b\u5fc5\u305a\u30d0\u30a4\u30ca\u30ea\u30e2\u30fc\u30c9\u3092\u6307\u5b9a\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u3092\u52b9\u7387\u7684\u304b\u3064\u5b89\u5168\u306b\u51fa\u529b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-11\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u6642\u306b\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u4e3b\u306a\u30a8\u30e9\u30fc\u3068\u305d\u306e\u5bfe\u51e6\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d5\u30a1\u30a4\u30eb\u30aa\u30fc\u30d7\u30f3\u30a8\u30e9\u30fc\u306e\u691c\u51fa\u3068\u51e6\u7406<\/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;fstream&gt;\n#include &lt;system_error&gt;\n\nvoid handleFileOpen() {\n    std::ofstream file;\n    try {\n        file.open(\"output.txt\");\n\n        \/\/ \u5931\u6557\u30c1\u30a7\u30c3\u30af\u65b9\u6cd51: \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u78ba\u8a8d\n        if (!file) {\n            throw std::runtime_error(\"\u30d5\u30a1\u30a4\u30eb\u306e\u30aa\u30fc\u30d7\u30f3\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n        }\n\n        \/\/ \u5931\u6557\u30c1\u30a7\u30c3\u30af\u65b9\u6cd52: \u4f8b\u5916\u3092\u6709\u52b9\u5316\n        file.exceptions(std::ofstream::failbit | std::ofstream::badbit);\n\n    } catch (const std::system_error&amp; e) {\n        std::cerr &lt;&lt; \"\u30b7\u30b9\u30c6\u30e0\u30a8\u30e9\u30fc: \" &lt;&lt; e.code().message() &lt;&lt; std::endl;\n        \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u8a18\u9332\u3084\u30a8\u30e9\u30fc\u901a\u77e5\u306a\u3069\u9069\u5207\u306a\u51e6\u7406\u3092\u5b9f\u884c\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u66f8\u304d\u8fbc\u307f\u30a8\u30e9\u30fc\u306e\u691c\u51fa\u3068\u51e6\u7406<\/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=\"\">void handleWriteError() {\n    std::ofstream file(\"data.txt\");\n    file.exceptions(std::ofstream::failbit | std::ofstream::badbit);\n\n    try {\n        \/\/ \u66f8\u304d\u8fbc\u307f\u64cd\u4f5c\n        file &lt;&lt; \"\u30c7\u30fc\u30bf\" &lt;&lt; std::endl;\n\n        \/\/ \u660e\u793a\u7684\u306a\u66f8\u304d\u8fbc\u307f\u78ba\u8a8d\n        if (file.fail()) {\n            throw std::runtime_error(\"\u66f8\u304d\u8fbc\u307f\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n        }\n\n        \/\/ \u30d0\u30c3\u30d5\u30a1\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u3092\u78ba\u8a8d\n        file.flush();\n\n    } catch (const std::exception&amp; e) {\n        \/\/ \u30a8\u30e9\u30fc\u51e6\u7406\n        std::cerr &lt;&lt; \"\u30a8\u30e9\u30fc: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u4f8b\u5916\u51e6\u7406\u3092\u4f7f\u7528\u3057\u305f\u5805\u7262\u306a\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>RAII\u539f\u5247\u306b\u57fa\u3065\u304f\u5b9f\u88c5<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class FileWriter {\nprivate:\n    std::ofstream file;\n\npublic:\n    FileWriter(const std::string&amp; filename) {\n        file.exceptions(std::ofstream::failbit | std::ofstream::badbit);\n        file.open(filename);\n    }\n\n    ~FileWriter() {\n        if (file.is_open()) {\n            try {\n                file.close();\n            } catch (...) {\n                \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u4f8b\u5916\u306f\u5371\u967a\u306a\u305f\u3081\u3001\u30ed\u30b0\u306e\u307f\u8a18\u9332\n                std::cerr &lt;&lt; \"\u30d5\u30a1\u30a4\u30eb\u306e\u30af\u30ed\u30fc\u30ba\u6642\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\" &lt;&lt; std::endl;\n            }\n        }\n    }\n\n    void write(const std::string&amp; data) {\n        file &lt;&lt; data &lt;&lt; std::endl;\n        file.flush();\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1<\/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=\"\">bool writeDataSafely(const std::string&amp; filename, const std::string&amp; data) {\n    \/\/ \u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\n    std::string tempFile = filename + \".tmp\";\n    try {\n        std::ofstream temp(tempFile);\n        temp.exceptions(std::ofstream::failbit | std::ofstream::badbit);\n\n        temp &lt;&lt; data &lt;&lt; std::endl;\n        temp.close();\n\n        \/\/ \u6210\u529f\u3057\u305f\u3089\u672c\u6765\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u79fb\u52d5\n        std::rename(tempFile.c_str(), filename.c_str());\n        return true;\n\n    } catch (const std::exception&amp; e) {\n        \/\/ \u30a8\u30e9\u30fc\u6642\u306f\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u3092\u524a\u9664\n        std::remove(tempFile.c_str());\n        return false;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d1\u30b9\u5236\u5fa1\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/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;filesystem&gt;\nnamespace fs = std::filesystem;\n\nbool isPathSafe(const std::string&amp; filename) {\n    fs::path path = fs::absolute(filename);\n\n    \/\/ \u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u5bfe\u7b56\n    if (path.string().find(\"..\") != std::string::npos) {\n        return false;\n    }\n\n    \/\/ \u8a31\u53ef\u3055\u308c\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u304b\u30c1\u30a7\u30c3\u30af\n    fs::path allowedDir = fs::current_path() \/ \"data\";\n    if (!fs::starts_with(path, allowedDir)) {\n        return false;\n    }\n\n    return true;\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d5\u30a1\u30a4\u30eb\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u306e\u9069\u5207\u306a\u8a2d\u5b9a<\/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;sys\/stat.h&gt;\n\nvoid setSecurePermissions(const std::string&amp; filename) {\n    #ifdef _WIN32\n        _chmod(filename.c_str(), _S_IREAD | _S_IWRITE);\n    #else\n        chmod(filename.c_str(), S_IRUSR | S_IWUSR);\n    #endif\n}<\/pre>\n\n\n\n<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a1\u30a4\u30eb\u540d\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/li>\n\n\n\n<li>\u30d1\u30b9\u5236\u5fa1\uff08\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u5bfe\u7b56\uff09<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30d5\u30a1\u30a4\u30eb\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a<\/li>\n\n\n\n<li>\u4e00\u6642\u30d5\u30a1\u30a4\u30eb\u306e\u5b89\u5168\u306a\u51e6\u7406<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u6642\u306e\u60c5\u5831\u6f0f\u6d29\u9632\u6b62<\/li>\n\n\n\n<li>\u30d0\u30c3\u30d5\u30a1\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u5bfe\u7b56<\/li>\n\n\n\n<li>\u540c\u6642\u30a2\u30af\u30bb\u30b9\u5236\u5fa1<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5bfe\u7b56\u3092\u9069\u5207\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-15\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u305f\u9ad8\u901f\u5316\u624b\u6cd5<\/h3>\n\n\n\n<p>\u52b9\u7387\u7684\u306a\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u305f\u3081\u306b\u3001\u9069\u5207\u306a\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u624b\u6cd5\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ab\u30b9\u30bf\u30e0\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u306e\u8a2d\u5b9a<\/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;fstream&gt;\n#include &lt;vector&gt;\n\nclass BufferedFileWriter {\nprivate:\n    std::ofstream file;\n    std::vector&lt;char&gt; buffer;\n    const size_t BUFFER_SIZE = 8192;  \/\/ 8KB buffer\n\npublic:\n    BufferedFileWriter(const std::string&amp; filename) \n        : buffer(BUFFER_SIZE) {\n        file.rdbuf()-&gt;pubsetbuf(buffer.data(), buffer.size());\n        file.open(filename);\n    }\n\n    void write(const std::string&amp; data) {\n        file &lt;&lt; data;\n    }\n\n    void flush() {\n        file.flush();\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u30d0\u30c3\u30d5\u30a1\u306e\u6700\u9069\u5316<\/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=\"\">\/\/ \u72ec\u81ea\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u30d0\u30c3\u30d5\u30a1\u306e\u5b9f\u88c5\nclass CustomStreamBuffer : public std::streambuf {\nprivate:\n    static const size_t BUFFER_SIZE = 16384;  \/\/ 16KB\n    char buffer[BUFFER_SIZE];\n\nprotected:\n    int_type overflow(int_type ch) override {\n        if (sync() == 0 &amp;&amp; ch != traits_type::eof()) {\n            *pptr() = ch;\n            pbump(1);\n            return ch;\n        }\n        return traits_type::eof();\n    }\n\n    int sync() override {\n        if (pptr() &gt; pbase()) {\n            std::fwrite(pbase(), 1, pptr() - pbase(), stdout);\n            setp(buffer, buffer + BUFFER_SIZE);\n            return 0;\n        }\n        return 0;\n    }\n\npublic:\n    CustomStreamBuffer() {\n        setp(buffer, buffer + BUFFER_SIZE);\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u305f\u3081\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u306e\u51e6\u7406<\/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=\"\">void writeDataInChunks(const std::vector&lt;std::string&gt;&amp; data, \n                      const std::string&amp; filename) {\n    std::ofstream file(filename);\n    const size_t CHUNK_SIZE = 1000;  \/\/ 1000\u884c\u3054\u3068\u306b\u51e6\u7406\n\n    std::stringstream chunk;\n    for (size_t i = 0; i &lt; data.size(); ++i) {\n        chunk &lt;&lt; data[i] &lt;&lt; '\\n';\n\n        \/\/ \u30c1\u30e3\u30f3\u30af\u30b5\u30a4\u30ba\u306b\u9054\u3057\u305f\u3089\u66f8\u304d\u8fbc\u307f\n        if ((i + 1) % CHUNK_SIZE == 0) {\n            file &lt;&lt; chunk.str();\n            chunk.str(\"\");  \/\/ \u30d0\u30c3\u30d5\u30a1\u3092\u30af\u30ea\u30a2\n            chunk.clear();  \/\/ \u72b6\u614b\u3092\u30ea\u30bb\u30c3\u30c8\n        }\n    }\n\n    \/\/ \u6b8b\u308a\u306e\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u307f\n    if (!chunk.str().empty()) {\n        file &lt;&lt; chunk.str();\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30de\u30c3\u30d4\u30f3\u30b0\u306e\u6d3b\u7528<\/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;boost\/iostreams\/device\/mapped_file.hpp&gt;\n\nvoid writeWithMemoryMapping(const std::string&amp; filename, size_t fileSize) {\n    \/\/ \u66f8\u304d\u8fbc\u307f\u7528\u306e\u30e1\u30e2\u30ea\u30de\u30c3\u30d4\u30f3\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\n    boost::iostreams::mapped_file_params params;\n    params.path = filename;\n    params.flags = boost::iostreams::mapped_file::readwrite;\n    params.new_file_size = fileSize;\n\n    boost::iostreams::mapped_file_sink file(params);\n\n    \/\/ \u30e1\u30e2\u30ea\u30de\u30c3\u30d4\u30f3\u30b0\u9818\u57df\u306b\u76f4\u63a5\u66f8\u304d\u8fbc\u307f\n    char* data = file.data();\n    \/\/ \u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u307f\n    \/\/ ...\n\n    file.close();\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u4e26\u5217\u51e6\u7406\u3092\u6d3b\u7528\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u6700\u9069\u5316<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u975e\u540c\u671f\u66f8\u304d\u8fbc\u307f<\/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;future&gt;\n#include &lt;queue&gt;\n#include &lt;mutex&gt;\n\nclass AsyncFileWriter {\nprivate:\n    std::ofstream file;\n    std::queue&lt;std::string&gt; writeQueue;\n    std::mutex queueMutex;\n    std::future&lt;void&gt; writerThread;\n    bool running = true;\n\n    void writerFunction() {\n        while (running || !writeQueue.empty()) {\n            std::string data;\n            {\n                std::lock_guard&lt;std::mutex&gt; lock(queueMutex);\n                if (!writeQueue.empty()) {\n                    data = std::move(writeQueue.front());\n                    writeQueue.pop();\n                }\n            }\n            if (!data.empty()) {\n                file &lt;&lt; data &lt;&lt; std::endl;\n            }\n            std::this_thread::sleep_for(std::chrono::milliseconds(1));\n        }\n    }\n\npublic:\n    AsyncFileWriter(const std::string&amp; filename) \n        : file(filename) {\n        writerThread = std::async(std::launch::async,\n            &amp;AsyncFileWriter::writerFunction, this);\n    }\n\n    void write(const std::string&amp; data) {\n        std::lock_guard&lt;std::mutex&gt; lock(queueMutex);\n        writeQueue.push(data);\n    }\n\n    ~AsyncFileWriter() {\n        running = false;\n        if (writerThread.valid()) {\n            writerThread.wait();\n        }\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306b\u3088\u308b\u4e26\u5217\u51e6\u7406<\/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=\"\">void parallelFileWrite(const std::vector&lt;std::string&gt;&amp; data,\n                      const std::string&amp; baseFilename,\n                      size_t numThreads) {\n    std::vector&lt;std::thread&gt; threads;\n    const size_t chunkSize = (data.size() + numThreads - 1) \/ numThreads;\n\n    for (size_t i = 0; i &lt; numThreads; ++i) {\n        threads.emplace_back([&amp;, i]() {\n            std::string filename = baseFilename + std::to_string(i);\n            std::ofstream file(filename);\n\n            size_t start = i * chunkSize;\n            size_t end = std::min(start + chunkSize, data.size());\n\n            for (size_t j = start; j &lt; end; ++j) {\n                file &lt;&lt; data[j] &lt;&lt; '\\n';\n            }\n        });\n    }\n\n    for (auto&amp; thread : threads) {\n        thread.join();\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\u3001\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\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\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6280\u8853\u3092\u5fdc\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-19\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3068\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">CSV\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u4ee5\u4e0b\u306b\u3001\u30b7\u30f3\u30d7\u30eb\u3067\u4f7f\u3044\u3084\u3059\u3044CSV\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\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;fstream&gt;\n#include &lt;vector&gt;\n#include &lt;string&gt;\n#include &lt;stdexcept&gt;\n\nclass CSVWriter {\nprivate:\n    std::ofstream file;\n    const char delimiter;\n\npublic:\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\uff1a\u30d5\u30a1\u30a4\u30eb\u540d\u3068\u533a\u5207\u308a\u6587\u5b57\u3092\u6307\u5b9a\n    CSVWriter(const std::string&amp; filename, char delim = ',') \n        : delimiter(delim) {\n        file.open(filename);\n        if (!file) {\n            throw std::runtime_error(\"\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3051\u307e\u305b\u3093\u3067\u3057\u305f: \" + filename);\n        }\n    }\n\n    \/\/ 1\u884c\u306e\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080\n    void writeRow(const std::vector&lt;std::string&gt;&amp; data) {\n        for (size_t i = 0; i &lt; data.size(); ++i) {\n            if (i &gt; 0) {\n                file &lt;&lt; delimiter;\n            }\n            \/\/ \u30ab\u30f3\u30de\u3092\u542b\u3080\u5834\u5408\u306f\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8\u3067\u56f2\u3080\n            if (data[i].find(delimiter) != std::string::npos) {\n                file &lt;&lt; \"\\\"\" &lt;&lt; data[i] &lt;&lt; \"\\\"\";\n            } else {\n                file &lt;&lt; data[i];\n            }\n        }\n        file &lt;&lt; \"\\n\";\n    }\n\n    \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308b\n    ~CSVWriter() {\n        if (file.is_open()) {\n            file.close();\n        }\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nint main() {\n    try {\n        CSVWriter csv(\"output.csv\");\n\n        \/\/ \u30d8\u30c3\u30c0\u30fc\u884c\u306e\u66f8\u304d\u8fbc\u307f\n        csv.writeRow({\"\u5546\u54c1\u540d\", \"\u4fa1\u683c\", \"\u5728\u5eab\u6570\"});\n\n        \/\/ \u30c7\u30fc\u30bf\u884c\u306e\u66f8\u304d\u8fbc\u307f\n        csv.writeRow({\"\u308a\u3093\u3054\", \"100\", \"50\"});\n        csv.writeRow({\"\u307f\u304b\u3093, \u30aa\u30ec\u30f3\u30b8\", \"150\", \"30\"});  \/\/ \u30ab\u30f3\u30de\u3092\u542b\u3080\u4f8b\n        csv.writeRow({\"\u30d0\u30ca\u30ca\", \"200\", \"20\"});\n\n        std::cout &lt;&lt; \"CSV\u30d5\u30a1\u30a4\u30eb\u306e\u4f5c\u6210\u306b\u6210\u529f\u3057\u307e\u3057\u305f\u3002\" &lt;&lt; std::endl;\n\n    } catch (const std::exception&amp; e) {\n        std::cerr &lt;&lt; \"\u30a8\u30e9\u30fc: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n        return 1;\n    }\n\n    return 0;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>\u30b7\u30f3\u30d7\u30eb\u3067\u4f7f\u3044\u3084\u3059\u3044\u30ed\u30b0\u51fa\u529b\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u4f8b\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;fstream&gt;\n#include &lt;string&gt;\n#include &lt;ctime&gt;\n#include &lt;iomanip&gt;\n#include &lt;sstream&gt;\n\nclass Logger {\npublic:\n    \/\/ \u30ed\u30b0\u30ec\u30d9\u30eb\u306e\u5b9a\u7fa9\n    enum class Level {\n        INFO,\n        WARNING,\n        ERROR\n    };\n\nprivate:\n    std::ofstream file;\n    Level minLevel;\n\n    \/\/ \u73fe\u5728\u6642\u523b\u3092\u6587\u5b57\u5217\u3067\u53d6\u5f97\n    std::string getTimestamp() {\n        auto now = std::time(nullptr);\n        auto tm = std::localtime(&amp;now);\n        std::stringstream ss;\n        ss &lt;&lt; std::put_time(tm, \"%Y-%m-%d %H:%M:%S\");\n        return ss.str();\n    }\n\n    \/\/ \u30ed\u30b0\u30ec\u30d9\u30eb\u3092\u6587\u5b57\u5217\u306b\u5909\u63db\n    std::string getLevelString(Level level) {\n        switch (level) {\n            case Level::INFO:    return \"INFO\";\n            case Level::WARNING: return \"WARNING\";\n            case Level::ERROR:   return \"ERROR\";\n            default:            return \"UNKNOWN\";\n        }\n    }\n\npublic:\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\uff1a\u30d5\u30a1\u30a4\u30eb\u540d\u3068\u30ed\u30b0\u30ec\u30d9\u30eb\u3092\u6307\u5b9a\n    Logger(const std::string&amp; filename, Level level = Level::INFO) \n        : minLevel(level) {\n        file.open(filename, std::ios::app);  \/\/ \u8ffd\u8a18\u30e2\u30fc\u30c9\u3067\u30aa\u30fc\u30d7\u30f3\n        if (!file) {\n            throw std::runtime_error(\"\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3051\u307e\u305b\u3093: \" + filename);\n        }\n    }\n\n    \/\/ \u30ed\u30b0\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u51fa\u529b\n    void log(Level level, const std::string&amp; message) {\n        if (level &gt;= minLevel) {\n            file &lt;&lt; getTimestamp() &lt;&lt; \" [\"\n                 &lt;&lt; std::setw(7) &lt;&lt; std::left &lt;&lt; getLevelString(level)\n                 &lt;&lt; \"] \" &lt;&lt; message &lt;&lt; std::endl;\n        }\n    }\n\n    \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308b\n    ~Logger() {\n        if (file.is_open()) {\n            file.close();\n        }\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nint main() {\n    try {\n        Logger logger(\"application.log\");\n\n        logger.log(Logger::Level::INFO, \"\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u8d77\u52d5\u3057\u307e\u3057\u305f\");\n        logger.log(Logger::Level::WARNING, \"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\");\n        logger.log(Logger::Level::ERROR, \"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n\n        std::cout &lt;&lt; \"\u30ed\u30b0\u306e\u51fa\u529b\u306b\u6210\u529f\u3057\u307e\u3057\u305f\u3002\" &lt;&lt; std::endl;\n\n    } catch (const std::exception&amp; e) {\n        std::cerr &lt;&lt; \"\u30a8\u30e9\u30fc: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n        return 1;\n    }\n\n    return 0;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u51fa\u529b\u306e\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n<p>INI\u5f62\u5f0f\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u51fa\u529b\u3059\u308b\u7c21\u5358\u306a\u5b9f\u88c5\u4f8b\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;fstream&gt;\n#include &lt;map&gt;\n#include &lt;string&gt;\n#include &lt;stdexcept&gt;\n\nclass ConfigWriter {\nprivate:\n    std::ofstream file;\n    std::map&lt;std::string, std::map&lt;std::string, std::string&gt;&gt; sections;\n\npublic:\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\uff1a\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u6307\u5b9a\n    ConfigWriter(const std::string&amp; filename) {\n        file.open(filename);\n        if (!file) {\n            throw std::runtime_error(\"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3051\u307e\u305b\u3093: \" + filename);\n        }\n    }\n\n    \/\/ \u30bb\u30af\u30b7\u30e7\u30f3\u3068\u8a2d\u5b9a\u5024\u3092\u8ffd\u52a0\n    void setValue(const std::string&amp; section, \n                 const std::string&amp; key, \n                 const std::string&amp; value) {\n        sections[section][key] = value;\n    }\n\n    \/\/ \u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\n    void save() {\n        for (const auto&amp; section : sections) {\n            file &lt;&lt; \"[\" &lt;&lt; section.first &lt;&lt; \"]\\n\";\n            for (const auto&amp; entry : section.second) {\n                file &lt;&lt; entry.first &lt;&lt; \" = \" &lt;&lt; entry.second &lt;&lt; \"\\n\";\n            }\n            file &lt;&lt; \"\\n\";\n        }\n        file.flush();\n    }\n\n    \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308b\n    ~ConfigWriter() {\n        if (file.is_open()) {\n            file.close();\n        }\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nint main() {\n    try {\n        ConfigWriter config(\"settings.ini\");\n\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u5b9a\n        config.setValue(\"Database\", \"host\", \"localhost\");\n        config.setValue(\"Database\", \"port\", \"5432\");\n        config.setValue(\"Database\", \"name\", \"myapp\");\n\n        \/\/ \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8a2d\u5b9a\n        config.setValue(\"Application\", \"name\", \"MyApp\");\n        config.setValue(\"Application\", \"version\", \"1.0.0\");\n        config.setValue(\"Application\", \"debug\", \"true\");\n\n        \/\/ \u8a2d\u5b9a\u3092\u4fdd\u5b58\n        config.save();\n\n        std::cout &lt;&lt; \"\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u4f5c\u6210\u306b\u6210\u529f\u3057\u307e\u3057\u305f\u3002\" &lt;&lt; std::endl;\n\n    } catch (const std::exception&amp; e) {\n        std::cerr &lt;&lt; \"\u30a8\u30e9\u30fc: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n        return 1;\n    }\n\n    return 0;\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u3088\u304f\u5fc5\u8981\u3068\u3055\u308c\u308b\u6a5f\u80fd\u3092\u3001\u30b7\u30f3\u30d7\u30eb\u304b\u3064\u5805\u7262\u306b\u5b9f\u88c5\u3057\u305f\u3082\u306e\u3067\u3059\u3002<br>\u305d\u308c\u305e\u308c\u306e\u30af\u30e9\u30b9\u306f\u3001\u4ee5\u4e0b\u306e\u7279\u5fb4\u3092\u6301\u3063\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u304c\u9069\u5207\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b<\/li>\n\n\n\n<li>RAII\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3092\u884c\u3063\u3066\u3044\u308b<\/li>\n\n\n\n<li>\u4f7f\u3044\u65b9\u304c\u76f4\u611f\u7684\u3067\u5206\u304b\u308a\u3084\u3059\u3044<\/li>\n\n\n\n<li>\u57fa\u672c\u7684\u306a\u6a5f\u80fd\u306b\u7d5e\u3063\u3066\u30b7\u30f3\u30d7\u30eb\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30b3\u30fc\u30c9\u3092\u57fa\u790e\u3068\u3057\u3066\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u6a5f\u80fd\u3092\u8ffd\u52a0\u30fb\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u3067\u3001<br>\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":{"0":"post-2143","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\/2143","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=2143"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2143\/revisions"}],"predecessor-version":[{"id":2144,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2143\/revisions\/2144"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}