{"id":1871,"date":"2025-03-24T08:49:44","date_gmt":"2025-03-23T23:49:44","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1871"},"modified":"2025-03-24T08:49:44","modified_gmt":"2025-03-23T23:49:44","slug":"%e3%80%90c%e5%85%a5%e9%96%80%e3%80%91string%e3%81%a8int%e3%81%ae%e5%a4%89%e6%8f%9b%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a5%e3%81%a4%e3%81%ae%e5%ae%9f%e8%a3%85%e3%83%91%e3%82%bf","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1871","title":{"rendered":"\u3010C++\u5165\u9580\u3011string\u3068int\u306e\u5909\u63db\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a5\u3064\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3068\u30a8\u30e9\u30fc\u51e6\u7406"},"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\u306estring-int\u5909\u63db\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u306a\u305cstring-int\u5909\u63db\u304c\u5fc5\u8981\u306b\u306a\u308b\u306e\u304b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">C++\u3067\u306e\u6587\u5b57\u5217\u51e6\u7406\u306e\u7279\u5fb4\u3068\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">string\u304b\u3089int\u3078\u306e\u5909\u63db\u624b\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">std::stoi\u95a2\u6570\u3092\u4f7f\u3063\u305f\u57fa\u672c\u7684\u306a\u5909\u63db\u624b\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-5\">stringstream\u7d4c\u7531\u3067\u306e\u5909\u63db\u624b\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-6\">boost::lexical_cast\u3092\u6d3b\u7528\u3057\u305f\u578b\u5909\u63db<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u5b9f\u88c5\u9078\u629e\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">int\u304b\u3089string\u3078\u306e\u5909\u63db\u624b\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">std::to_string\u306b\u3088\u308b\u76f4\u63a5\u5909\u63db<\/a>      <\/li>      <li>        <a href=\"#i-10\">stringstream\u7d4c\u7531\u3067\u306e\u6570\u5024\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u9ad8\u5ea6\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u6570\u5024\u7bc4\u56f2\u5916\u30a8\u30e9\u30fc\u306e\u6b63\u3057\u3044\u51e6\u7406\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u6709\u52b9\u306a\u5165\u529b\u5024\u306e\u691c\u51fa\u3068\u4f8b\u5916\u51e6\u7406<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u307e\u3068\u3081<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-16\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u5404\u5909\u63db\u624b\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u91cd\u8996\u3059\u308b\u305f\u3081\u306e\u653b\u7565\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u307e\u3068\u3081<\/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\u306estring-int\u5909\u63db\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u306a\u305cstring-int\u5909\u63db\u304c\u5fc5\u8981\u306b\u306a\u308b\u306e\u304b<\/h3>\n\n\n\n<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u6587\u5b57\u5217\uff08string\uff09\u3068\u6574\u6570\uff08int\uff09\u306e\u76f8\u4e92\u5909\u63db\u306f\u975e\u5e38\u306b\u4e00\u822c\u7684\u306a\u64cd\u4f5c\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Web\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u306e\u5165\u529b\u5024\u306e\u51e6\u7406<\/li>\n\n\n\n<li>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u5f15\u6570\u306e\u89e3\u6790<\/li>\n\n\n\n<li>\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u306e\u6570\u5024\u306e\u8aad\u307f\u8fbc\u307f<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u6c38\u7d9a\u5316\u3068\u8aad\u307f\u8fbc\u307f<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a\uff08\u591a\u304f\u306eDB\u306f\u6587\u5b57\u5217\u3068\u3057\u3066\u5024\u3092\u4fdd\u5b58\uff09<\/li>\n\n\n\n<li>CSV\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u306e\u30c6\u30ad\u30b9\u30c8\u30d9\u30fc\u30b9\u306e\u30c7\u30fc\u30bf\u51e6\u7406<\/li>\n\n\n\n<li>JSON\u3084XML\u306a\u3069\u306e\u69cb\u9020\u5316\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6587\u5b57\u5217\u5f62\u5f0f\u3067\u306e\u6f14\u7b97\u3084\u8868\u793a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u5024\u306e\u6841\u533a\u5207\u308a\u8868\u793a\uff08\u4f8b\uff1a1,234,567\uff09<\/li>\n\n\n\n<li>\u6570\u5024\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\uff08\u4f8b\uff1a\u5148\u982d0\u57cb\u3081\uff09<\/li>\n\n\n\n<li>\u8a08\u7b97\u7d50\u679c\u306e\u6587\u5b57\u5217\u5316<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">C++\u3067\u306e\u6587\u5b57\u5217\u51e6\u7406\u306e\u7279\u5fb4\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>C++\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u51e6\u7406\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u3068\u6ce8\u610f\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6587\u5b57\u5217\u578b\u306e\u7a2e\u985e<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u6765\u306eC\u8a00\u8a9e\u5f62\u5f0f\nchar str[] = \"123\";\n\n\/\/ C++\u306e\u6a19\u6e96\u6587\u5b57\u5217\nstd::string cpp_str = \"123\";\n\n\/\/ \u30ef\u30a4\u30c9\u6587\u5b57\u5217\uff08Unicode\u5bfe\u5fdc\uff09\nstd::wstring wide_str = L\"123\";<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u5909\u63db\u6642\u306e\u4e3b\u306a\u6ce8\u610f\u70b9<\/strong> a) <strong>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e\u8003\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   \/\/ \u5371\u967a\u306a\u4f8b\uff1a\u6574\u6570\u306e\u7bc4\u56f2\u3092\u8d85\u3048\u308b\u53ef\u80fd\u6027\n   std::string large_num = \"999999999999999999\";\n   try {\n       int num = std::stoi(large_num);  \/\/ std::out_of_range\u4f8b\u5916\u304c\u767a\u751f\n   } catch (const std::out_of_range&amp; e) {\n       std::cerr &lt;&lt; \"\u6570\u5024\u304c\u5927\u304d\u3059\u304e\u307e\u3059: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n   }<\/pre>\n\n\n\n<p>b) <strong>\u4e0d\u6b63\u306a\u5165\u529b\u5024\u306e\u51e6\u7406<\/strong><\/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=\"\">   \/\/ \u6570\u5024\u4ee5\u5916\u306e\u6587\u5b57\u3092\u542b\u3080\u6587\u5b57\u5217\n   std::string invalid_num = \"12a34\";\n   try {\n       int num = std::stoi(invalid_num);  \/\/ std::invalid_argument\u4f8b\u5916\u304c\u767a\u751f\n   } catch (const std::invalid_argument&amp; e) {\n       std::cerr &lt;&lt; \"\u4e0d\u6b63\u306a\u5165\u529b\u5024\u3067\u3059: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n   }<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30ed\u30b1\u30fc\u30eb\u4f9d\u5b58\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5730\u57df\u8a2d\u5b9a\u306b\u3088\u308a\u6570\u5024\u306e\u89e3\u91c8\u304c\u5909\u308f\u308b\u53ef\u80fd\u6027<\/li>\n\n\n\n<li>\u5c0f\u6570\u70b9\u306e\u8868\u8a18\uff08.\u304b,\u304b\uff09<\/li>\n\n\n\n<li>\u6841\u533a\u5207\u308a\u6587\u5b57\u306e\u9055\u3044<\/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=\"\">\/\/ \u30ed\u30b1\u30fc\u30eb\u3092\u8003\u616e\u3057\u305f\u5909\u63db\u306e\u4f8b\n#include &lt;locale&gt;\n#include &lt;sstream&gt;\n\nstd::locale loc(\"ja_JP.UTF-8\");\nstd::stringstream ss;\nss.imbue(loc);\nss &lt;&lt; \"1,234.56\";  \/\/ \u65e5\u672c\u8a9e\u30ed\u30b1\u30fc\u30eb\u3067\u306e\u6570\u5024\u8868\u8a18<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6587\u5b57\u5217\u21d4\u6570\u5024\u5909\u63db\u306f\u6bd4\u8f03\u7684\u30b3\u30b9\u30c8\u306e\u9ad8\u3044\u64cd\u4f5c<\/li>\n\n\n\n<li>\u983b\u7e41\u306a\u5909\u63db\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6d3b\u7528\u3092\u691c\u8a0e<\/li>\n\n\n\n<li>\u5927\u91cf\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u6642\u306f\u5909\u63db\u65b9\u6cd5\u306e\u9078\u629e\u304c\u91cd\u8981<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u7279\u5fb4\u3068\u6ce8\u610f\u70b9\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067\u3001\u9069\u5207\u306a\u5909\u63db\u624b\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u3001\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u9375\u3068\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u5909\u63db\u624b\u6cd5\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\">string\u304b\u3089int\u3078\u306e\u5909\u63db\u624b\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">std::stoi\u95a2\u6570\u3092\u4f7f\u3063\u305f\u57fa\u672c\u7684\u306a\u5909\u63db\u624b\u6cd5<\/h3>\n\n\n\n<p>std::stoi\u95a2\u6570\u306f\u3001C++11\u304b\u3089\u5c0e\u5165\u3055\u308c\u305f\u6700\u3082\u76f4\u63a5\u7684\u306a\u6587\u5b57\u5217\u304b\u3089\u6574\u6570\u3078\u306e\u5909\u63db\u65b9\u6cd5\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;string&gt;\n#include &lt;iostream&gt;\n\nint main() {\n    \/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\n    std::string num_str = \"123\";\n    int num = std::stoi(num_str);  \/\/ 123\u304c\u5f97\u3089\u308c\u308b\n\n    \/\/ \u57fa\u6570\uff08\u9032\u6570\uff09\u3092\u6307\u5b9a\u3057\u305f\u5909\u63db\n    std::string hex_str = \"1A\";\n    int hex_num = std::stoi(hex_str, nullptr, 16);  \/\/ 26\u304c\u5f97\u3089\u308c\u308b\n\n    \/\/ \u5909\u63db\u4f4d\u7f6e\u306e\u53d6\u5f97\n    size_t pos = 0;\n    std::string mixed_str = \"42abc\";\n    int mixed_num = std::stoi(mixed_str, &amp;pos, 10);  \/\/ 42\u304c\u5f97\u3089\u308c\u308b\u3001pos=2\n\n    std::cout &lt;&lt; \"\u6570\u5024\u90e8\u5206: \" &lt;&lt; mixed_num &lt;&lt; std::endl;\n    std::cout &lt;&lt; \"\u5909\u63db\u7d42\u4e86\u4f4d\u7f6e: \" &lt;&lt; pos &lt;&lt; std::endl;\n    return 0;\n}<\/pre>\n\n\n\n<p><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u3044\u65b9\u304c\u5358\u7d14\u3067\u76f4\u611f\u7684<\/li>\n\n\n\n<li>\u9032\u6570\u306e\u6307\u5b9a\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u90e8\u5206\u7684\u306a\u6570\u5024\u306e\u62bd\u51fa\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<p><strong>\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u51e6\u7406\u304c\u5fc5\u9808<\/li>\n\n\n\n<li>\u5927\u304d\u306a\u6570\u5024\u306e\u5834\u5408\u306f\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e risk<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">stringstream\u7d4c\u7531\u3067\u306e\u5909\u63db\u624b\u6cd5<\/h3>\n\n\n\n<p>stringstream\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u306f\u3001\u3088\u308a\u67d4\u8edf\u306a\u5909\u63db\u3068\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u304c\u53ef\u80fd\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;sstream&gt;\n#include &lt;string&gt;\n#include &lt;iostream&gt;\n\nint main() {\n    \/\/ \u57fa\u672c\u7684\u306a\u5909\u63db\n    std::string num_str = \"123\";\n    std::stringstream ss(num_str);\n    int num;\n    if (ss &gt;&gt; num) {\n        std::cout &lt;&lt; \"\u5909\u63db\u6210\u529f: \" &lt;&lt; num &lt;&lt; std::endl;\n    }\n\n    \/\/ \u8907\u6570\u306e\u6570\u5024\u306e\u9023\u7d9a\u5909\u63db\n    std::stringstream ss2(\"123 456 789\");\n    int n1, n2, n3;\n    if (ss2 &gt;&gt; n1 &gt;&gt; n2 &gt;&gt; n3) {\n        std::cout &lt;&lt; \"\u9023\u7d9a\u5909\u63db\u6210\u529f: \" &lt;&lt; n1 &lt;&lt; \", \" &lt;&lt; n2 &lt;&lt; \", \" &lt;&lt; n3 &lt;&lt; std::endl;\n    }\n\n    \/\/ \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u4ed8\u304d\u5909\u63db\n    std::stringstream ss3;\n    ss3 &lt;&lt; std::hex &lt;&lt; \"1A\";  \/\/ 16\u9032\u6570\u3068\u3057\u3066\u89e3\u91c8\n    int hex_num;\n    ss3 &gt;&gt; hex_num;  \/\/ 26\u304c\u5f97\u3089\u308c\u308b\n\n    return 0;\n}<\/pre>\n\n\n\n<p><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9023\u7d9a\u3057\u305f\u5909\u63db\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u8c4a\u5bcc\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3<\/li>\n\n\n\n<li>\u4f8b\u5916\u3092\u4f7f\u308f\u306a\u3044\u30a8\u30e9\u30fc\u51e6\u7406\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<p><strong>\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>std::stoi\u3088\u308a\u82e5\u5e72\u5197\u9577<\/li>\n\n\n\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">boost::lexical_cast\u3092\u6d3b\u7528\u3057\u305f\u578b\u5909\u63db<\/h3>\n\n\n\n<p>boost::lexical_cast\u306f\u3001\u3088\u308a\u6c4e\u7528\u7684\u306a\u578b\u5909\u63db\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=\"\">#include &lt;boost\/lexical_cast.hpp&gt;\n#include &lt;iostream&gt;\n#include &lt;string&gt;\n\nint main() {\n    try {\n        \/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\n        std::string num_str = \"123\";\n        int num = boost::lexical_cast&lt;int&gt;(num_str);\n\n        \/\/ \u76f4\u63a5\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u304b\u3089\u306e\u5909\u63db\n        int direct_num = boost::lexical_cast&lt;int&gt;(\"456\");\n\n        \/\/ \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u5909\u63db\n        std::string large_num = \"999999999999\";\n        try {\n            int overflow_num = boost::lexical_cast&lt;int&gt;(large_num);\n        } catch (const boost::bad_lexical_cast&amp; e) {\n            std::cerr &lt;&lt; \"\u5909\u63db\u30a8\u30e9\u30fc: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n        }\n\n    } catch (const boost::bad_lexical_cast&amp; e) {\n        std::cerr &lt;&lt; \"\u5909\u63db\u306b\u5931\u6557\u3057\u307e\u3057\u305f: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    }\n\n    return 0;\n}<\/pre>\n\n\n\n<p><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d9\u30fc\u30b9\u306e\u76f4\u611f\u7684\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/li>\n\n\n\n<li>\u591a\u69d8\u306a\u578b\u3078\u306e\u5909\u63db\u306b\u5bfe\u5fdc<\/li>\n\n\n\n<li>\u5805\u7262\u306a\u30a8\u30e9\u30fc\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<p><strong>\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Boost\u30e9\u30a4\u30d6\u30e9\u30ea\u3078\u306e\u4f9d\u5b58<\/li>\n\n\n\n<li>\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u6027\u304c\u6bd4\u8f03\u7684\u4f4e\u3044<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u5b9f\u88c5\u9078\u629e\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>std::stoi\u3092\u9078\u3076\u30b1\u30fc\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b7\u30f3\u30d7\u30eb\u306a\u6587\u5b57\u5217\u304b\u3089\u6574\u6570\u3078\u306e\u5909\u63db<\/li>\n\n\n\n<li>\u9032\u6570\u6307\u5b9a\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n\n\n\n<li>\u90e8\u5206\u7684\u306a\u6570\u5024\u62bd\u51fa\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>stringstream\u3092\u9078\u3076\u30b1\u30fc\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u5024\u3092\u9023\u7d9a\u3057\u3066\u5909\u63db<\/li>\n\n\n\n<li>\u8a73\u7d30\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u4f8b\u5916\u3092\u907f\u3051\u305f\u3044\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>boost::lexical_cast\u3092\u9078\u3076\u30b1\u30fc\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6c4e\u7528\u7684\u306a\u578b\u5909\u63db\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u3059\u3067\u306bBoost\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/li>\n\n\n\n<li>\u578b\u5b89\u5168\u6027\u3092\u91cd\u8996\u3059\u308b\u5834\u5408<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">int\u304b\u3089string\u3078\u306e\u5909\u63db\u624b\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">std::to_string\u306b\u3088\u308b\u76f4\u63a5\u5909\u63db<\/h3>\n\n\n\n<p>std::to_string\u306f\u3001C++11\u3067\u5c0e\u5165\u3055\u308c\u305f\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u6570\u5024\u304b\u3089\u6587\u5b57\u5217\u3078\u306e\u5909\u63db\u65b9\u6cd5\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;string&gt;\n#include &lt;iostream&gt;\n\nint main() {\n    \/\/ \u57fa\u672c\u7684\u306a\u6574\u6570\u306e\u5909\u63db\n    int num = 123;\n    std::string str = std::to_string(num);  \/\/ \"123\"\u304c\u5f97\u3089\u308c\u308b\n\n    \/\/ \u8ca0\u306e\u6570\u306e\u5909\u63db\n    int negative = -456;\n    std::string neg_str = std::to_string(negative);  \/\/ \"-456\"\u304c\u5f97\u3089\u308c\u308b\n\n    \/\/ \u5927\u304d\u306a\u6570\u5024\u306e\u5909\u63db\n    int large_num = 1234567;\n    std::string large_str = std::to_string(large_num);  \/\/ \"1234567\"\u304c\u5f97\u3089\u308c\u308b\n\n    std::cout &lt;&lt; \"\u5909\u63db\u7d50\u679c:\\n\"\n              &lt;&lt; \"\u901a\u5e38\u306e\u6570: \" &lt;&lt; str &lt;&lt; \"\\n\"\n              &lt;&lt; \"\u8ca0\u306e\u6570: \" &lt;&lt; neg_str &lt;&lt; \"\\n\"\n              &lt;&lt; \"\u5927\u304d\u306a\u6570: \" &lt;&lt; large_str &lt;&lt; std::endl;\n\n    return 0;\n}<\/pre>\n\n\n\n<p><strong>\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u3044\u65b9\u304c\u6975\u3081\u3066\u30b7\u30f3\u30d7\u30eb<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u306e\u53ef\u80fd\u6027\u304c\u6975\u3081\u3066\u4f4e\u3044<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u578b\u30c1\u30a7\u30c3\u30af\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<p><strong>\u30c7\u30e1\u30ea\u30c3\u30c8<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u304c\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>\u30ed\u30b1\u30fc\u30eb\u8a2d\u5b9a\u304c\u53cd\u6620\u3055\u308c\u306a\u3044<\/li>\n\n\n\n<li>\u51fa\u529b\u5f62\u5f0f\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u304c\u5236\u9650\u3055\u308c\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">stringstream\u7d4c\u7531\u3067\u306e\u6570\u5024\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1<\/h3>\n\n\n\n<p>stringstream\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3088\u308a\u7d30\u304b\u3044\u51fa\u529b\u5f62\u5f0f\u306e\u5236\u5fa1\u304c\u53ef\u80fd\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;sstream&gt;\n#include &lt;iomanip&gt;\n#include &lt;iostream&gt;\n\nint main() {\n    int num = 123;\n    std::stringstream ss;\n\n    \/\/ \u57fa\u672c\u7684\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    ss &lt;&lt; std::setfill('0') &lt;&lt; std::setw(6) &lt;&lt; num;  \/\/ \"000123\"\n    std::string padded_str = ss.str();\n    ss.str(\"\");  \/\/ \u30d0\u30c3\u30d5\u30a1\u3092\u30af\u30ea\u30a2\n\n    \/\/ 16\u9032\u6570\u8868\u793a\n    ss &lt;&lt; std::hex &lt;&lt; std::uppercase &lt;&lt; num;  \/\/ \"7B\"\n    std::string hex_str = ss.str();\n    ss.str(\"\");\n\n    \/\/ \u6841\u533a\u5207\u308a\u306e\u8ffd\u52a0\n    ss.imbue(std::locale(\"\"));  \/\/ \u30b7\u30b9\u30c6\u30e0\u30ed\u30b1\u30fc\u30eb\u3092\u4f7f\u7528\n    ss &lt;&lt; std::fixed &lt;&lt; 1234567;\n    std::string formatted_str = ss.str();\n\n    \/\/ \u3055\u307e\u3056\u307e\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u4f8b\n    std::stringstream examples;\n    int value = 42;\n\n    examples &lt;&lt; \"10\u9032\u6570: \" &lt;&lt; std::dec &lt;&lt; value &lt;&lt; \"\\n\"\n             &lt;&lt; \"16\u9032\u6570(\u5c0f\u6587\u5b57): \" &lt;&lt; std::hex &lt;&lt; value &lt;&lt; \"\\n\"\n             &lt;&lt; \"16\u9032\u6570(\u5927\u6587\u5b57): \" &lt;&lt; std::uppercase &lt;&lt; value &lt;&lt; \"\\n\"\n             &lt;&lt; \"8\u9032\u6570: \" &lt;&lt; std::oct &lt;&lt; value &lt;&lt; \"\\n\"\n             &lt;&lt; \"0\u57cb\u3081(8\u6841): \" &lt;&lt; std::dec &lt;&lt; std::setfill('0') \n             &lt;&lt; std::setw(8) &lt;&lt; value &lt;&lt; \"\\n\";\n\n    std::cout &lt;&lt; \"\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u4f8b:\\n\" &lt;&lt; examples.str() &lt;&lt; std::endl;\n\n    return 0;\n}<\/pre>\n\n\n\n<p><strong>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u30aa\u30d7\u30b7\u30e7\u30f3\u4e00\u89a7<\/strong>:<\/p>\n\n\n<div id=\"id-ad533ec7-894e-4b3d-9cba-7d4f896e8adc\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30de\u30cb\u30d4\u30e5\u30ec\u30fc\u30bf<\/th><th>\u8aac\u660e<\/th><th>\u4f7f\u7528\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>std::setw(n)<\/td><td>\u30d5\u30a3\u30fc\u30eb\u30c9\u5e45\u306e\u8a2d\u5b9a<\/td><td>std::setw(5) &lt;&lt; 42<\/td><\/tr><tr><td>std::setfill(c)<\/td><td>\u57cb\u3081\u6587\u5b57\u306e\u8a2d\u5b9a<\/td><td>std::setfill(\u20180\u2019)<\/td><\/tr><tr><td>std::hex<\/td><td>16\u9032\u6570\u8868\u793a<\/td><td>std::hex &lt;&lt; 255<\/td><\/tr><tr><td>std::dec<\/td><td>10\u9032\u6570\u8868\u793a<\/td><td>std::dec &lt;&lt; 42<\/td><\/tr><tr><td>std::oct<\/td><td>8\u9032\u6570\u8868\u793a<\/td><td>std::oct &lt;&lt; 42<\/td><\/tr><tr><td>std::uppercase<\/td><td>\u5927\u6587\u5b57\u3067\u306e\u8868\u793a<\/td><td>std::uppercase &lt;&lt; std::hex &lt;&lt; 255<\/td><\/tr><tr><td>std::showbase<\/td><td>\u57fa\u6570\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u306e\u8868\u793a<\/td><td>std::showbase &lt;&lt; std::hex &lt;&lt; 42<\/td><\/tr><tr><td>std::internal<\/td><td>\u7b26\u53f7\u3068\u6570\u5024\u306e\u9593\u306e\u57cb\u3081<\/td><td>std::internal &lt;&lt; std::setw(5) &lt;&lt; -42<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u9ad8\u5ea6\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u306e\u5b9f\u88c5\u4f8b<\/h3>\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;sstream&gt;\n#include &lt;iomanip&gt;\n#include &lt;string&gt;\n\nclass NumberFormatter {\npublic:\n    static std::string format_with_commas(int value) {\n        std::stringstream ss;\n        ss.imbue(std::locale(\"\"));\n        ss &lt;&lt; std::fixed &lt;&lt; value;\n        return ss.str();\n    }\n\n    static std::string format_as_hex(int value, bool uppercase = false, \n                                   bool show_base = false) {\n        std::stringstream ss;\n        if (show_base) ss &lt;&lt; std::showbase;\n        if (uppercase) ss &lt;&lt; std::uppercase;\n        ss &lt;&lt; std::hex &lt;&lt; value;\n        return ss.str();\n    }\n\n    static std::string format_with_padding(int value, size_t width, \n                                         char pad_char = '0') {\n        std::stringstream ss;\n        ss &lt;&lt; std::setfill(pad_char) &lt;&lt; std::setw(width) &lt;&lt; value;\n        return ss.str();\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nint main() {\n    int num = 1234567;\n    std::cout &lt;&lt; \"\u6841\u533a\u5207\u308a\u4ed8\u304d: \" \n              &lt;&lt; NumberFormatter::format_with_commas(num) &lt;&lt; \"\\n\"\n              &lt;&lt; \"16\u9032\u6570(0x\u4ed8\u304d): \" \n              &lt;&lt; NumberFormatter::format_as_hex(num, true, true) &lt;&lt; \"\\n\"\n              &lt;&lt; \"0\u57cb\u3081(10\u6841): \" \n              &lt;&lt; NumberFormatter::format_with_padding(num, 10) &lt;&lt; std::endl;\n\n    return 0;\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001stringstream\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u6570\u5024\u304b\u3089\u6587\u5b57\u5217\u3078\u306e\u5909\u63db\u3092\u975e\u5e38\u306b\u67d4\u8edf\u306b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7528\u9014\u306b\u5fdc\u3058\u3066\u3001\u5358\u7d14\u306a<code>std::to_string<\/code>\u3068\u9ad8\u5ea6\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u304c\u53ef\u80fd\u306a<code>stringstream<\/code>\u3092\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306a\u5b9f\u88c5\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u6570\u5024\u7bc4\u56f2\u5916\u30a8\u30e9\u30fc\u306e\u6b63\u3057\u3044\u51e6\u7406\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u6570\u5024\u5909\u63db\u6642\u306e\u7bc4\u56f2\u5916\u30a8\u30e9\u30fc\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b89\u5168\u6027\u306b\u95a2\u308f\u308b\u91cd\u8981\u306a\u554f\u984c\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u9069\u5207\u306a\u51e6\u7406\u65b9\u6cd5\u3092\u793a\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;string&gt;\n#include &lt;iostream&gt;\n#include &lt;limits&gt;\n#include &lt;stdexcept&gt;\n\nclass NumberConverter {\npublic:\n    \/\/ \u5b89\u5168\u306a\u6570\u5024\u5909\u63db\u3092\u884c\u3046\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\n    static std::pair&lt;int, bool&gt; safe_string_to_int(const std::string&amp; str) {\n        try {\n            size_t pos;\n            int result = std::stoi(str, &amp;pos);\n\n            \/\/ \u6587\u5b57\u5217\u5168\u4f53\u304c\u6570\u5024\u3068\u3057\u3066\u89e3\u91c8\u3055\u308c\u305f\u304b\u78ba\u8a8d\n            if (pos != str.length()) {\n                return {0, false};  \/\/ \u5909\u63db\u5931\u6557\n            }\n\n            return {result, true};  \/\/ \u5909\u63db\u6210\u529f\n        }\n        catch (const std::out_of_range&amp;) {\n            return {0, false};  \/\/ \u7bc4\u56f2\u5916\u30a8\u30e9\u30fc\n        }\n        catch (const std::invalid_argument&amp;) {\n            return {0, false};  \/\/ \u4e0d\u6b63\u306a\u5165\u529b\n        }\n    }\n\n    \/\/ \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u306e\u5909\u63db\n    static std::pair&lt;int, bool&gt; safe_bounded_conversion(\n        const std::string&amp; str, int min_value, int max_value) {\n\n        auto  = safe_string_to_int(str);\n        if (!success) {\n            return {0, false};\n        }\n\n        if (value &lt; min_value || value &gt; max_value) {\n            return {0, false};  \/\/ \u6307\u5b9a\u7bc4\u56f2\u5916\n        }\n\n        return {value, true};\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid demonstrate_safe_conversion() {\n    std::vector&lt;std::string&gt; test_cases = {\n        \"123\",              \/\/ \u6b63\u5e38\u306a\u6570\u5024\n        \"99999999999999\",   \/\/ \u7bc4\u56f2\u5916\u306e\u6570\u5024\n        \"abc\",              \/\/ \u4e0d\u6b63\u306a\u5165\u529b\n        \"123abc\",           \/\/ \u6570\u5024+\u4e0d\u6b63\u306a\u6587\u5b57\n        \"-456\"              \/\/ \u8ca0\u306e\u6570\n    };\n\n    for (const auto&amp; test : test_cases) {\n        auto  = NumberConverter::safe_string_to_int(test);\n        std::cout &lt;&lt; \"\u5165\u529b: \" &lt;&lt; test &lt;&lt; \" -&gt; \";\n        if (success) {\n            std::cout &lt;&lt; \"\u5909\u63db\u6210\u529f: \" &lt;&lt; value &lt;&lt; std::endl;\n        } else {\n            std::cout &lt;&lt; \"\u5909\u63db\u5931\u6557\" &lt;&lt; std::endl;\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u6709\u52b9\u306a\u5165\u529b\u5024\u306e\u691c\u51fa\u3068\u4f8b\u5916\u51e6\u7406<\/h3>\n\n\n\n<p>\u5165\u529b\u5024\u306e\u691c\u8a3c\u306f\u3001\u5909\u63db\u51e6\u7406\u306e\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u308b\u91cd\u8981\u306a\u8981\u7d20\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;string&gt;\n#include &lt;regex&gt;\n\nclass InputValidator {\npublic:\n    \/\/ \u6570\u5024\u5f62\u5f0f\u306e\u691c\u8a3c\n    static bool is_valid_integer(const std::string&amp; str) {\n        std::regex integer_pattern(\"^-?[0-9]+$\");\n        return std::regex_match(str, integer_pattern);\n    }\n\n    \/\/ \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n    static bool is_valid_range(int value, int min_value, int max_value) {\n        return value &gt;= min_value &amp;&amp; value &lt;= max_value;\n    }\n\n    \/\/ \u8a73\u7d30\u306a\u30a8\u30e9\u30fc\u60c5\u5831\u3092\u63d0\u4f9b\u3059\u308b\u5909\u63db\u95a2\u6570\n    static std::pair&lt;int, std::string&gt; validate_and_convert(\n        const std::string&amp; input) {\n\n        if (!is_valid_integer(input)) {\n            return {0, \"\u4e0d\u6b63\u306a\u6570\u5024\u5f62\u5f0f\u3067\u3059\"};\n        }\n\n        try {\n            int value = std::stoi(input);\n            return {value, \"\"};  \/\/ \u6210\u529f\n        }\n        catch (const std::out_of_range&amp;) {\n            return {0, \"\u6570\u5024\u304c\u7bc4\u56f2\u5916\u3067\u3059\"};\n        }\n        catch (const std::exception&amp; e) {\n            return {0, std::string(\"\u4e88\u671f\u3057\u306a\u3044\u30a8\u30e9\u30fc: \") + e.what()};\n        }\n    }\n};\n\n\/\/ \u30a8\u30e9\u30fc\u51e6\u7406\u3092\u542b\u3080\u7dcf\u5408\u7684\u306a\u5909\u63db\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\nclass StringIntConverter {\npublic:\n    struct ConversionResult {\n        bool success;\n        int value;\n        std::string error_message;\n    };\n\n    static ConversionResult convert(const std::string&amp; input, \n                                  int min_value = std::numeric_limits&lt;int&gt;::min(),\n                                  int max_value = std::numeric_limits&lt;int&gt;::max()) {\n        \/\/ \u5165\u529b\u5024\u306e\u691c\u8a3c\n        if (!InputValidator::is_valid_integer(input)) {\n            return {false, 0, \"\u4e0d\u6b63\u306a\u6570\u5024\u5f62\u5f0f\u3067\u3059\"};\n        }\n\n        try {\n            int value = std::stoi(input);\n\n            \/\/ \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\n            if (!InputValidator::is_valid_range(value, min_value, max_value)) {\n                return {false, 0, \"\u6307\u5b9a\u3055\u308c\u305f\u7bc4\u56f2\u5916\u306e\u5024\u3067\u3059\"};\n            }\n\n            return {true, value, \"\"};\n        }\n        catch (const std::out_of_range&amp;) {\n            return {false, 0, \"\u6570\u5024\u304c int \u306e\u7bc4\u56f2\u5916\u3067\u3059\"};\n        }\n        catch (const std::exception&amp; e) {\n            return {false, 0, std::string(\"\u5909\u63db\u30a8\u30e9\u30fc: \") + e.what()};\n        }\n    }\n};\n\n\/\/ \u5b9f\u88c5\u4f8b\nvoid demonstrate_error_handling() {\n    std::vector&lt;std::string&gt; test_inputs = {\n        \"123\",              \/\/ \u6b63\u5e38\u306a\u5165\u529b\n        \"-456\",             \/\/ \u8ca0\u306e\u6570\n        \"99999999999999\",   \/\/ \u7bc4\u56f2\u5916\n        \"abc\",              \/\/ \u4e0d\u6b63\u306a\u5165\u529b\n        \"123.45\",           \/\/ \u5c0f\u6570\n        \"\"                  \/\/ \u7a7a\u6587\u5b57\u5217\n    };\n\n    for (const auto&amp; input : test_inputs) {\n        auto result = StringIntConverter::convert(input, -1000, 1000);\n        std::cout &lt;&lt; \"\u5165\u529b: \" &lt;&lt; input &lt;&lt; \"\\n\";\n        if (result.success) {\n            std::cout &lt;&lt; \"\u5909\u63db\u6210\u529f: \" &lt;&lt; result.value &lt;&lt; \"\\n\";\n        } else {\n            std::cout &lt;&lt; \"\u30a8\u30e9\u30fc: \" &lt;&lt; result.error_message &lt;&lt; \"\\n\";\n        }\n        std::cout &lt;&lt; \"-------------------\\n\";\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u307e\u3068\u3081<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5165\u529b\u5024\u306e\u4e8b\u524d\u691c\u8a3c<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6b63\u898f\u8868\u73fe\u306b\u3088\u308b\u5f62\u5f0f\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u7bc4\u56f2\u306e\u59a5\u5f53\u6027\u78ba\u8a8d<\/li>\n\n\n\n<li>\u7a7a\u6587\u5b57\u5217\u3084\u4e0d\u6b63\u6587\u5b57\u306e\u30c1\u30a7\u30c3\u30af<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u51e6\u7406\u306e\u9069\u5207\u306a\u4f7f\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>std::out_of_range \u306e\u6355\u6349<\/li>\n\n\n\n<li>std::invalid_argument \u306e\u51e6\u7406<\/li>\n\n\n\n<li>\u4e88\u671f\u3057\u306a\u3044\u4f8b\u5916\u306e\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u60c5\u5831\u306e\u63d0\u4f9b<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8a73\u7d30\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u306e\u7a2e\u985e\u306e\u8b58\u5225<\/li>\n\n\n\n<li>\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u306e\u8a18\u9332<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b89\u5168\u306a\u623b\u308a\u5024\u306e\u8a2d\u8a08<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>std::pair \u3084\u69cb\u9020\u4f53\u306b\u3088\u308b\u7d50\u679c\u3068\u30b9\u30c6\u30fc\u30bf\u30b9\u306e\u8fd4\u5374<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u72b6\u614b\u306e\u660e\u78ba\u306a\u8868\u73fe<\/li>\n\n\n\n<li>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u9069\u5207\u306a\u9078\u629e<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5805\u7262\u306astring-int\u5909\u63db\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u6700\u9069\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u5404\u5909\u63db\u624b\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/h3>\n\n\n\n<p>\u7570\u306a\u308b\u5909\u63db\u624b\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6bd4\u8f03\u3059\u308b\u305f\u3081\u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30b3\u30fc\u30c9\u3068\u7d50\u679c\u3092\u793a\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;chrono&gt;\n#include &lt;iostream&gt;\n#include &lt;sstream&gt;\n#include &lt;string&gt;\n#include &lt;vector&gt;\n#include &lt;iomanip&gt;\n#include &lt;boost\/lexical_cast.hpp&gt;\n\nclass BenchmarkTest {\nprivate:\n    \/\/ \u6642\u9593\u8a08\u6e2c\u7528\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\n    template&lt;typename Func&gt;\n    static long long measure_execution_time(Func func, int iterations) {\n        auto start = std::chrono::high_resolution_clock::now();\n        for (int i = 0; i &lt; iterations; ++i) {\n            func();\n        }\n        auto end = std::chrono::high_resolution_clock::now();\n        return std::chrono::duration_cast&lt;std::chrono::microseconds&gt;\n               (end - start).count();\n    }\n\npublic:\n    static void run_string_to_int_benchmark() {\n        const int iterations = 100000;\n        std::string test_str = \"12345\";\n\n        \/\/ std::stoi \u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\n        auto stoi_time = measure_execution_time([&amp;test_str]() {\n            try {\n                int val = std::stoi(test_str);\n            } catch (...) {}\n        }, iterations);\n\n        \/\/ stringstream \u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\n        auto ss_time = measure_execution_time([&amp;test_str]() {\n            std::stringstream ss(test_str);\n            int val;\n            ss &gt;&gt; val;\n        }, iterations);\n\n        \/\/ boost::lexical_cast \u306e\u30d9\u30f3\u30c1\u30de\u30fc\u30af\n        auto boost_time = measure_execution_time([&amp;test_str]() {\n            try {\n                int val = boost::lexical_cast&lt;int&gt;(test_str);\n            } catch (...) {}\n        }, iterations);\n\n        \/\/ \u7d50\u679c\u306e\u8868\u793a\n        std::cout &lt;&lt; std::fixed &lt;&lt; std::setprecision(2);\n        std::cout &lt;&lt; \"\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u7d50\u679c\uff08\" &lt;&lt; iterations \n                  &lt;&lt; \"\u56de\u306e\u5b9f\u884c\uff09:\\n\";\n        std::cout &lt;&lt; \"std::stoi: \" &lt;&lt; stoi_time \/ 1000.0 \n                  &lt;&lt; \" ms\\n\";\n        std::cout &lt;&lt; \"stringstream: \" &lt;&lt; ss_time \/ 1000.0 \n                  &lt;&lt; \" ms\\n\";\n        std::cout &lt;&lt; \"boost::lexical_cast: \" &lt;&lt; boost_time \/ 1000.0 \n                  &lt;&lt; \" ms\\n\";\n    }\n};<\/pre>\n\n\n\n<p>\u4e00\u822c\u7684\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\uff1a<\/p>\n\n\n<div id=\"id-1ebce1c1-58f2-406f-ab2c-ded8e6043281\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5909\u63db\u624b\u6cd5<\/th><th>\u76f8\u5bfe\u7684\u306a\u901f\u5ea6<\/th><th>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/th><th>\u7528\u9014\u306b\u9069\u3057\u305f\u72b6\u6cc1<\/th><\/tr><\/thead><tbody><tr><td>std::stoi<\/td><td>\u6700\u901f<\/td><td>\u4f4e<\/td><td>\u5358\u7d14\u306a\u5909\u63db\u3001\u9ad8\u983b\u5ea6\u306e\u5909\u63db<\/td><\/tr><tr><td>stringstream<\/td><td>\u4e2d\u7a0b\u5ea6<\/td><td>\u4e2d<\/td><td>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u5834\u5408<\/td><\/tr><tr><td>boost::lexical_cast<\/td><td>\u3084\u3084\u9045\u3044<\/td><td>\u4e2d<\/td><td>\u6c4e\u7528\u7684\u306a\u578b\u5909\u63db\u304c\u5fc5\u8981\u306a\u5834\u5408<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u91cd\u8996\u3059\u308b\u305f\u3081\u306e\u653b\u7565\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6587\u5b57\u5217\u30d0\u30c3\u30d5\u30a1\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class OptimizedConverter {\npublic:\n    \/\/ \u4e8b\u524d\u306b\u78ba\u4fdd\u3057\u305f\u30d0\u30c3\u30d5\u30a1\u3092\u518d\u5229\u7528\u3059\u308b\u4f8b\n    static std::string int_to_string_optimized(int value) {\n        \/\/ \u6700\u592712\u6587\u5b57\uff08\u7b26\u53f7 + 10\u6841 + \u7d42\u7aef\u6587\u5b57\uff09\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u9759\u7684\u306b\u78ba\u4fdd\n        static thread_local char buffer[12];\n        auto [ptr, ec] = std::to_chars(\n            std::begin(buffer), std::end(buffer), value);\n        return std::string(buffer, ptr - buffer);\n    }\n\n    \/\/ stringstream \u306e\u518d\u5229\u7528\u4f8b\n    static int string_to_int_optimized(const std::string&amp; str) {\n        static thread_local std::stringstream ss;\n        ss.clear();  \/\/ \u30d5\u30e9\u30b0\u3092\u30af\u30ea\u30a2\n        ss.str(str); \/\/ \u30d0\u30c3\u30d5\u30a1\u3092\u8a2d\u5b9a\n\n        int value;\n        ss &gt;&gt; value;\n        return value;\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class MemoryOptimizedConverter {\npublic:\n    \/\/ \u6587\u5b57\u5217\u30d7\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u305f\u6700\u9069\u5316\n    class StringPool {\n    private:\n        static constexpr size_t POOL_SIZE = 1024;\n        char pool_[POOL_SIZE];\n        size_t current_pos_ = 0;\n\n    public:\n        std::string_view allocate_string(const char* str, size_t len) {\n            if (current_pos_ + len &gt;= POOL_SIZE) {\n                current_pos_ = 0;  \/\/ \u30d7\u30fc\u30eb\u3092\u30ea\u30bb\u30c3\u30c8\n            }\n\n            std::memcpy(pool_ + current_pos_, str, len);\n            std::string_view result(pool_ + current_pos_, len);\n            current_pos_ += len;\n            return result;\n        }\n    };\n\n    \/\/ \u6570\u5024\u21d4\u6587\u5b57\u5217\u5909\u63db\u306e\u9ad8\u901f\u30ad\u30e3\u30c3\u30b7\u30e5\n    class ConversionCache {\n    private:\n        static constexpr size_t CACHE_SIZE = 1000;\n        std::array&lt;std::string, CACHE_SIZE&gt; int_to_str_cache_;\n        std::array&lt;int, CACHE_SIZE&gt; str_to_int_cache_;\n\n    public:\n        ConversionCache() {\n            \/\/ \u3088\u304f\u4f7f\u7528\u3055\u308c\u308b\u5024\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u521d\u671f\u5316\n            for (int i = 0; i &lt; CACHE_SIZE; ++i) {\n                int_to_str_cache_[i] = std::to_string(i);\n                str_to_int_cache_[i] = i;\n            }\n        }\n\n        const std::string&amp; get_string(int value) {\n            if (value &gt;= 0 &amp;&amp; value &lt; CACHE_SIZE) {\n                return int_to_str_cache_;\n            }\n            static thread_local std::string result;\n            result = std::to_string(value);\n            return result;\n        }\n    };\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ConversionOptimizer {\npublic:\n    \/\/ \u6700\u9069\u5316\u3055\u308c\u305f\u30d0\u30c3\u30c1\u51e6\u7406\n    static std::vector&lt;int&gt; batch_string_to_int(\n        const std::vector&lt;std::string&gt;&amp; strings) {\n        std::vector&lt;int&gt; results;\n        results.reserve(strings.size());  \/\/ \u30e1\u30e2\u30ea\u306e\u4e8b\u524d\u78ba\u4fdd\n\n        static thread_local std::stringstream ss;\n        for (const auto&amp; str : strings) {\n            ss.clear();\n            ss.str(str);\n            int value;\n            if (ss &gt;&gt; value) {\n                results.push_back(value);\n            }\n        }\n        return results;\n    }\n\n    \/\/ \u30e1\u30e2\u30ea\u30d7\u30fc\u30eb\u4f7f\u7528\u4f8b\n    static void process_large_dataset(\n        const std::vector&lt;std::string&gt;&amp; data) {\n        \/\/ \u30e1\u30e2\u30ea\u30d7\u30fc\u30eb\u306e\u521d\u671f\u5316\n        boost::pool&lt;&gt; memory_pool(sizeof(int));\n\n        std::vector&lt;int*&gt; results;\n        results.reserve(data.size());\n\n        for (const auto&amp; str : data) {\n            int* value = static_cast&lt;int*&gt;(memory_pool.malloc());\n            try {\n                *value = std::stoi(str);\n                results.push_back(value);\n            } catch (...) {\n                memory_pool.free(value);\n            }\n        }\n\n        \/\/ \u51e6\u7406\u5f8c\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n        for (auto ptr : results) {\n            memory_pool.free(ptr);\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u307e\u3068\u3081<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5909\u63db\u624b\u6cd5\u306e\u9078\u629e\u57fa\u6e96<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5358\u7d14\u306a\u5909\u63db\u306b\u306f<code>std::stoi<\/code>\/<code>std::to_string<\/code>\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f<code>stringstream<\/code>\u3092\u518d\u5229\u7528<\/li>\n\n\n\n<li>\u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u6642\u306f\u30d0\u30c3\u30c1\u51e6\u7406\u3092\u691c\u8a0e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u6700\u9069\u5316\u306e\u30dd\u30a4\u30f3\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\u30d0\u30c3\u30d5\u30a1\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u30d7\u30fc\u30eb\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u30ed\u30fc\u30ab\u30eb\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b9f\u88c5\u6642\u306e\u6ce8\u610f\u70b9<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u51e6\u7406\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u8003\u616e<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u30c6\u30a3\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u9632\u6b62<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30e9\u30a4\u30f3\u306e\u8003\u616e<\/li>\n\n\n\n<li><\/li>\n<\/ul>\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-1871","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\/1871","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=1871"}],"version-history":[{"count":2,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1871\/revisions"}],"predecessor-version":[{"id":1873,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1871\/revisions\/1873"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1871"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1871"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}