{"id":2215,"date":"2025-03-24T08:47:59","date_gmt":"2025-03-23T23:47:59","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2215"},"modified":"2025-03-24T08:48:24","modified_gmt":"2025-03-23T23:48:24","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91c%e3%81%a7%e5%ae%9f%e8%a3%85%e3%81%99%e3%82%8b6%e3%81%a4%e3%81%ae%e5%9b%9b%e6%8d%a8%e4%ba%94%e5%85%a5%e3%83%86%e3%82%af%e3%83%8b","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2215","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011C++\u3067\u5b9f\u88c5\u3059\u308b6\u3064\u306e\u56db\u6368\u4e94\u5165\u30c6\u30af\u30cb\u30c3\u30af &#8211; \u30d7\u30ed\u304c\u6559\u3048\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9"},"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\">\u56db\u6368\u4e94\u5165\u306e\u57fa\u790e\u77e5\u8b58\u3068\u5b9f\u88c5\u306b\u304a\u3051\u308b\u6ce8\u610f\u70b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u6570\u5b66\u7684\u306a\u56db\u6368\u4e94\u5165\u306e\u5b9a\u7fa9\u3068\u7279\u6b8a\u306a\u30b1\u30fc\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u6d6e\u52d5\u5c0f\u6570\u70b9\u306b\u304a\u3051\u308b\u56db\u6368\u4e94\u5165\u306e\u843d\u3068\u3057\u7a74<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">C++\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u5229\u7528\u3067\u304d\u308b\u56db\u6368\u4e94\u5165\u95a2\u6570<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">std::round\u306e\u7279\u5fb4\u3068\u6b63\u3057\u3044\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">std::floor \u3068 std::ceil \u3092\u4f7f\u3063\u305f\u56db\u6368\u4e94\u5165\u306e\u5b9f\u88c5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">\u76ee\u7684\u5225\u306e\u56db\u6368\u4e94\u5165\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">\u9280\u884c\u53d6\u5f15\u5411\u3051\u306e\u5076\u6570\u4e38\u3081\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-8\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u91cd\u8996\u3057\u305f\u9ad8\u901f\u306a\u56db\u6368\u4e94\u5165\u306e\u5b9f\u88c5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-9\">\u6307\u5b9a\u6841\u6570\u3067\u306e\u56db\u6368\u4e94\u5165\u5b9f\u88c5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-10\">\u56db\u6368\u4e94\u5165\u306b\u304a\u3051\u308b\u7cbe\u5ea6\u3068\u30a8\u30e9\u30fc\u51e6\u7406<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-11\">\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u7cbe\u5ea6\u9650\u754c\u3078\u306e\u5bfe\u51e6\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3068\u30a2\u30f3\u30c0\u30fc\u30d5\u30ed\u30fc\u306e\u9632\u6b62\u7b56<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u306e\u56db\u6368\u4e94\u5165\u306e\u5b9f\u88c5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">\u7570\u306a\u308b\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u306e\u52d5\u4f5c\u306e\u9055\u3044\u3068\u5bfe\u7b56<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u72ec\u7acb\u306a\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-16\">\u56db\u6368\u4e94\u5165\u306e\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u5b9f\u88c5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3092\u8003\u616e\u3057\u305f\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u8a2d\u8a08<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">\u7570\u306a\u308b\u5165\u529b\u5024\u3067\u306e\u52d5\u4f5c\u691c\u8a3c\u65b9\u6cd5<\/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\">\u56db\u6368\u4e94\u5165\u306e\u57fa\u790e\u77e5\u8b58\u3068\u5b9f\u88c5\u306b\u304a\u3051\u308b\u6ce8\u610f\u70b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u6570\u5b66\u7684\u306a\u56db\u6368\u4e94\u5165\u306e\u5b9a\u7fa9\u3068\u7279\u6b8a\u306a\u30b1\u30fc\u30b9<\/h3>\n\n\n\n<p>\u56db\u6368\u4e94\u5165\u306f\u4e00\u898b\u5358\u7d14\u306a\u6f14\u7b97\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u5b9f\u88c5\u3059\u308b\u969b\u306b\u306f\u69d8\u3005\u306a\u8003\u616e\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u306f\u57fa\u672c\u7684\u306a\u5b9a\u7fa9\u3068\u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u306b\u3064\u3044\u3066\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u6570\u5b66\u7684\u306a\u56db\u6368\u4e94\u5165\u306e\u57fa\u672c\u30eb\u30fc\u30eb\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>5\u672a\u6e80\u306e\u6570\u5b57\u306f\u5207\u308a\u6368\u3066<\/li>\n\n\n\n<li>5\u4ee5\u4e0a\u306e\u6570\u5b57\u306f\u5207\u308a\u4e0a\u3052<\/li>\n<\/ul>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8ca0\u306e\u6570\u306e\u56db\u6368\u4e94\u5165<\/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=\"\">float number = -3.5;\n\/\/ -3.5\u306e\u56db\u6368\u4e94\u5165\u306f-4\u306b\u306a\u308b\n\/\/ \u591a\u304f\u306e\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u304c\u898b\u843d\u3068\u3057\u304c\u3061\u306a\u30dd\u30a4\u30f3\u30c8<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u4e01\u5ea65\u306e\u5834\u5408\u306e\u6271\u3044<\/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=\"\">float number = 2.5;\n\/\/ \u4f1d\u7d71\u7684\u306a\u56db\u6368\u4e94\u5165\u3067\u306f3\u306b\u5207\u308a\u4e0a\u3052\n\/\/ \u3057\u304b\u3057\u3001\u9280\u884c\u306e\u4e38\u3081\u51e6\u7406\u3067\u306f\u5076\u6570\u3078\u306e\u4e38\u3081\u3092\u63a1\u7528\u3059\u308b\u3053\u3068\u3082\u3042\u308b<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30bc\u30ed\u4ed8\u8fd1\u306e\u5024<\/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=\"\">float number = 0.5;\n\/\/ \u6b63\u306e\u6570\u3068\u540c\u3058\u30eb\u30fc\u30eb\u30671\u306b\u5207\u308a\u4e0a\u3052\nfloat number2 = -0.5;\n\/\/ \u8ca0\u306e\u6570\u3068\u540c\u3058\u30eb\u30fc\u30eb\u3067-1\u306b\u5207\u308a\u4e0b\u3052<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u6d6e\u52d5\u5c0f\u6570\u70b9\u306b\u304a\u3051\u308b\u56db\u6368\u4e94\u5165\u306e\u843d\u3068\u3057\u7a74<\/h3>\n\n\n\n<p>C++\u3067\u306e\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u56db\u6368\u4e94\u5165\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u6280\u8853\u7684\u306a\u8ab2\u984c\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6d6e\u52d5\u5c0f\u6570\u70b9\u306e\u7cbe\u5ea6\u9650\u754c<\/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 value = 2.675;\n\/\/ \u5b9f\u969b\u306e\u30e1\u30e2\u30ea\u4e0a\u3067\u306e\u5024\uff1a2.67499999999999982\nstd::cout &lt;&lt; std::setprecision(17) &lt;&lt; value &lt;&lt; std::endl;\n\/\/ \u671f\u5f85\u3059\u308b\u56db\u6368\u4e94\u5165\u7d50\u679c\uff1a2.68\n\/\/ \u5b9f\u969b\u306e\u7d50\u679c\uff1a2.67<\/pre>\n\n\n\n<p>\u3053\u306e\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306e\u30c6\u30af\u30cb\u30c3\u30af\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a4\u30d7\u30b7\u30ed\u30f3\u3092\u4f7f\u7528\u3057\u305f\u6bd4\u8f03\nconst double epsilon = 1e-10;\ndouble roundWithEpsilon(double value, int places) {\n    double multiplier = std::pow(10.0, places);\n    return std::round((value + epsilon) * multiplier) \/ multiplier;\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u6841\u6570\u306e\u6271\u3044<\/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=\"\">\/\/ \u4e0d\u9069\u5207\u306a\u5b9f\u88c5\u4f8b\ndouble bad_round(double value, int places) {\n    return std::round(value * 100) \/ 100;  \/\/ \u56fa\u5b9a\u30672\u6841\u306e\u5834\u5408\u306e\u307f\u5bfe\u5fdc\n}\n\n\/\/ \u3088\u308a\u67d4\u8edf\u306a\u5b9f\u88c5\u4f8b\ndouble better_round(double value, int places) {\n    double multiplier = std::pow(10.0, places);\n    return std::round(value * multiplier) \/ multiplier;\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e\u5371\u967a\u6027<\/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\u5b9f\u88c5\u4f8b\ndouble dangerous_round(double value, int places) {\n    double multiplier = std::pow(10.0, places);\n    \/\/ \u5927\u304d\u306a\u5024\u3067\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e\u53ef\u80fd\u6027\u3042\u308a\n    return std::round(value * multiplier) \/ multiplier;\n}\n\n\/\/ \u3088\u308a\u5b89\u5168\u306a\u5b9f\u88c5\u4f8b\ndouble safe_round(double value, int places) {\n    if (std::abs(value) &gt; std::pow(10.0, std::numeric_limits&lt;double&gt;::digits10 - places)) {\n        throw std::overflow_error(\"Value too large for specified precision\");\n    }\n    double multiplier = std::pow(10.0, places);\n    return std::round(value * multiplier) \/ multiplier;\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u790e\u77e5\u8b58\u3068\u6ce8\u610f\u70b9\u3092\u8e0f\u307e\u3048\u305f\u4e0a\u3067\u3001\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u3084\u5404\u7a2e\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u306f\u5f8c\u7d9a\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001C++\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u63d0\u4f9b\u3055\u308c\u3066\u3044\u308b\u56db\u6368\u4e94\u5165\u95a2\u6570\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">C++\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u5229\u7528\u3067\u304d\u308b\u56db\u6368\u4e94\u5165\u95a2\u6570<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">std::round\u306e\u7279\u5fb4\u3068\u6b63\u3057\u3044\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>C++11\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f<code>std::round<\/code>\u306f\u3001\u6700\u3082\u76f4\u63a5\u7684\u306a\u56db\u6368\u4e94\u5165\u95a2\u6570\u3067\u3059\u3002\u3053\u306e\u95a2\u6570\u306f<code>&lt;cmath&gt;<\/code>\u30d8\u30c3\u30c0\u30fc\u306b\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u3092\u6700\u3082\u8fd1\u3044\u6574\u6570\u5024\u306b\u4e38\u3081\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;cmath&gt;\n#include &lt;iostream&gt;\n#include &lt;iomanip&gt;\n\nint main() {\n    \/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\n    double value1 = 3.7;\n    std::cout &lt;&lt; std::round(value1) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 4\n\n    double value2 = 3.2;\n    std::cout &lt;&lt; std::round(value2) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 3\n\n    \/\/ \u8ca0\u306e\u6570\u306e\u6271\u3044\n    double value3 = -3.7;\n    std::cout &lt;&lt; std::round(value3) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: -4\n\n    \/\/ 0.5\u306e\u30b1\u30fc\u30b9\n    double value4 = 3.5;\n    std::cout &lt;&lt; std::round(value4) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 4\n}<\/pre>\n\n\n\n<p><code>std::round<\/code>\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\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=\"\">\/\/ float\u7248\nfloat value_f = 3.7f;\nfloat rounded_f = std::roundf(value_f);\n\n\/\/ long double\u7248\nlong double value_ld = 3.7L;\nlong double rounded_ld = std::roundl(value_ld);<\/pre>\n\n\n\n<p>\u7279\u5b9a\u306e\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\u3067\u56db\u6368\u4e94\u5165\u3059\u308b\u95a2\u6570\u306e\u5b9f\u88c5\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=\"\">double roundToDecimalPlaces(double value, int places) {\n    const double multiplier = std::pow(10.0, places);\n    return std::round(value * multiplier) \/ multiplier;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\ndouble value = 3.14159;\nstd::cout &lt;&lt; std::fixed &lt;&lt; std::setprecision(2);\nstd::cout &lt;&lt; roundToDecimalPlaces(value, 2) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: 3.14<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">std::floor \u3068 std::ceil \u3092\u4f7f\u3063\u305f\u56db\u6368\u4e94\u5165\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u6642\u306b\u306f<code>std::floor<\/code>\uff08\u5207\u308a\u6368\u3066\uff09\u3068<code>std::ceil<\/code>\uff08\u5207\u308a\u4e0a\u3052\uff09\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u72ec\u81ea\u306e\u56db\u6368\u4e94\u5165\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;cmath&gt;\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u56db\u6368\u4e94\u5165\u95a2\u6570\u306e\u5b9f\u88c5\ndouble customRound(double value) {\n    \/\/ \u6b63\u306e\u6570\u3068\u8ca0\u306e\u6570\u3067\u5225\u3005\u306b\u51e6\u7406\n    if (value &gt;= 0.0) {\n        return std::floor(value + 0.5);\n    } else {\n        return std::ceil(value - 0.5);\n    }\n}<\/pre>\n\n\n\n<p>\u3088\u308a\u9ad8\u5ea6\u306a\u5b9f\u88c5\u4f8b\uff08\u5076\u6570\u3078\u306e\u4e38\u3081\u3092\u884c\u3046\u30d0\u30f3\u30ab\u30fc\u30ba\u30fb\u30e9\u30a6\u30f3\u30c7\u30a3\u30f3\u30b0\uff09\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=\"\">double bankersRound(double value) {\n    double integerPart;\n    double fractionalPart = std::modf(value, &amp;integerPart);\n\n    if (std::fabs(fractionalPart) != 0.5) {\n        return std::round(value);\n    }\n\n    \/\/ 0.5\u306e\u5834\u5408\u306f\u5076\u6570\u306b\u4e38\u3081\u308b\n    if (std::fmod(integerPart, 2.0) == 0.0) {\n        return integerPart;\n    } else {\n        return value &gt; 0 ? integerPart + 1 : integerPart - 1;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nstd::cout &lt;&lt; bankersRound(2.5) &lt;&lt; std::endl;   \/\/ \u51fa\u529b: 2\nstd::cout &lt;&lt; bankersRound(3.5) &lt;&lt; std::endl;   \/\/ \u51fa\u529b: 4\nstd::cout &lt;&lt; bankersRound(-2.5) &lt;&lt; std::endl;  \/\/ \u51fa\u529b: -2<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\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=\"\">\/\/ \u9ad8\u901f\u306a\u56db\u6368\u4e94\u5165\u5b9f\u88c5\uff08\u5c0f\u6570\u70b9\u4ee5\u4e0b1\u6841\u306e\u5834\u5408\uff09\nint fastRound(double value) {\n    return (value &gt; 0.0) ? \n           static_cast&lt;int&gt;(value + 0.5) : \n           static_cast&lt;int&gt;(value - 0.5);\n}\n\n\/\/ SIMD\u6700\u9069\u5316\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\n#include &lt;immintrin.h&gt;\n\nvoid vectorizedRound(double* input, double* output, size_t size) {\n    for (size_t i = 0; i &lt; size; i += 2) {\n        __m128d values = _mm_load_pd(&amp;input[i]);\n        __m128d rounded = _mm_round_pd(values, _MM_FROUND_TO_NEAREST_INT);\n        _mm_store_pd(&amp;output[i], rounded);\n    }\n}<\/pre>\n\n\n\n<p>\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7cbe\u5ea6\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u578b\uff08float, double, long double\uff09\u3092\u9078\u629e\u3059\u308b<\/li>\n\n\n\n<li>\u5927\u304d\u306a\u5024\u3092\u6271\u3046\u5834\u5408\u306f\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306b\u6ce8\u610f<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u306a\u5834\u6240\u3067\u306f<code>fastRound<\/code>\u3084<code>vectorizedRound<\/code>\u306e\u4f7f\u7528\u3092\u691c\u8a0e<\/li>\n\n\n\n<li>\u91d1\u878d\u8a08\u7b97\u3067\u306f<code>bankersRound<\/code>\u306e\u4f7f\u7528\u3092\u691c\u8a0e<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u95a2\u6570\u3092\u57fa\u790e\u3068\u3057\u3066\u3001\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u5177\u4f53\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u5225\u306e\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">\u76ee\u7684\u5225\u306e\u56db\u6368\u4e94\u5165\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u9280\u884c\u53d6\u5f15\u5411\u3051\u306e\u5076\u6570\u4e38\u3081\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u91d1\u878d\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u516c\u5e73\u306a\u56db\u6368\u4e94\u5165\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u5076\u6570\u4e38\u3081\uff08Bankers Rounding\uff09\u304c\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u30010.5\u306e\u5834\u5408\u306b\u5e38\u306b\u5207\u308a\u4e0a\u3052\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u6700\u3082\u8fd1\u3044\u5076\u6570\u306b\u4e38\u3081\u308b\u65b9\u5f0f\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;cmath&gt;\n#include &lt;iostream&gt;\n#include &lt;decimal&gt;\n\nclass MoneyRounder {\nprivate:\n    \/\/ \u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\u3092\u4fdd\u6301\n    int decimals;\n\npublic:\n    explicit MoneyRounder(int decimal_places = 2) : decimals(decimal_places) {}\n\n    \/\/ \u5076\u6570\u4e38\u3081\u3092\u5b9f\u88c5\n    double roundCurrency(double amount) {\n        \/\/ \u30b9\u30b1\u30fc\u30eb\u30d5\u30a1\u30af\u30bf\u30fc\u306e\u8a08\u7b97\n        double scale = std::pow(10.0, decimals);\n        double scaled = amount * scale;\n\n        \/\/ 0.5\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\n        double fraction = std::abs(scaled) - std::floor(std::abs(scaled));\n        if (std::abs(fraction - 0.5) &lt; 1e-10) {\n            \/\/ 0.5\u306e\u5834\u5408\u306f\u5076\u6570\u306b\u306a\u308b\u3088\u3046\u306b\u8abf\u6574\n            double floored = std::floor(scaled);\n            if (std::fmod(floored, 2.0) == 0.0) {\n                return floored \/ scale;\n            } else {\n                return (floored + 1.0) \/ scale;\n            }\n        }\n\n        \/\/ 0.5\u4ee5\u5916\u306f\u901a\u5e38\u306e\u56db\u6368\u4e94\u5165\n        return std::round(scaled) \/ scale;\n    }\n\n    \/\/ \u8907\u6570\u306e\u901a\u8ca8\u91d1\u984d\u3092\u30d0\u30c3\u30c1\u51e6\u7406\n    std::vector&lt;double&gt; batchRoundCurrency(const std::vector&lt;double&gt;&amp; amounts) {\n        std::vector&lt;double&gt; result;\n        result.reserve(amounts.size());\n        for (const auto&amp; amount : amounts) {\n            result.push_back(roundCurrency(amount));\n        }\n        return result;\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid demonstrateBankingRounding() {\n    MoneyRounder rounder(2);  \/\/ \u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u3067\u4e38\u3081\n\n    std::cout &lt;&lt; std::fixed &lt;&lt; std::setprecision(2);\n    std::cout &lt;&lt; rounder.roundCurrency(2.135) &lt;&lt; std::endl;  \/\/ 2.14\n    std::cout &lt;&lt; rounder.roundCurrency(2.125) &lt;&lt; std::endl;  \/\/ 2.12 (\u5076\u6570\u4e38\u3081)\n    std::cout &lt;&lt; rounder.roundCurrency(2.145) &lt;&lt; std::endl;  \/\/ 2.14\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u91cd\u8996\u3057\u305f\u9ad8\u901f\u306a\u56db\u6368\u4e94\u5165\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3084\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u51e6\u7406\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3057\u305f\u5b9f\u88c5\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;immintrin.h&gt;\n#include &lt;vector&gt;\n\nclass FastRounder {\npublic:\n    \/\/ SIMD\u547d\u4ee4\u3092\u4f7f\u7528\u3057\u305f\u9ad8\u901f\u306a\u56db\u6368\u4e94\u5165\n    static void roundArraySIMD(const double* input, double* output, size_t size) {\n        \/\/ 16\u30d0\u30a4\u30c8\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u78ba\u8a8d\n        size_t aligned_size = size &amp; ~1ULL;\n\n        #pragma omp parallel for\n        for (size_t i = 0; i &lt; aligned_size; i += 2) {\n            __m128d values = _mm_load_pd(&amp;input[i]);\n            __m128d rounded = _mm_round_pd(values, _MM_FROUND_TO_NEAREST_INT);\n            _mm_store_pd(&amp;output[i], rounded);\n        }\n\n        \/\/ \u6b8b\u308a\u306e\u8981\u7d20\u3092\u51e6\u7406\n        for (size_t i = aligned_size; i &lt; size; ++i) {\n            output[i] = std::round(input[i]);\n        }\n    }\n\n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u5b9f\u88c5\n    static void roundArrayCacheOptimized(std::vector&lt;double&gt;&amp; values) {\n        constexpr size_t CACHE_LINE = 64;  \/\/ \u4e00\u822c\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u30e9\u30a4\u30f3\u30b5\u30a4\u30ba\n        const size_t block_size = CACHE_LINE \/ sizeof(double);\n\n        #pragma omp parallel for\n        for (size_t i = 0; i &lt; values.size(); i += block_size) {\n            size_t end = std::min(i + block_size, values.size());\n            for (size_t j = i; j &lt; end; ++j) {\n                values[j] = std::round(values[j]);\n            }\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u6307\u5b9a\u6841\u6570\u3067\u306e\u56db\u6368\u4e94\u5165\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u7570\u306a\u308b\u7cbe\u5ea6\u8981\u4ef6\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u67d4\u8edf\u306a\u5b9f\u88c5\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=\"\">class PrecisionRounder {\npublic:\n    \/\/ \u6307\u5b9a\u6841\u6570\u3067\u306e\u56db\u6368\u4e94\u5165\uff08\u6b63\u306e\u6841\u6570\u306f\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3001\u8ca0\u306e\u6841\u6570\u306f\u6574\u6570\u90e8\uff09\n    static double roundToSignificantDigits(double value, int digits) {\n        if (value == 0.0) return 0.0;\n\n        double scale = std::pow(10.0, digits - 1 - std::floor(std::log10(std::abs(value))));\n        return std::round(value * scale) \/ scale;\n    }\n\n    \/\/ \u79d1\u5b66\u7684\u8868\u8a18\u6cd5\u3067\u306e\u56db\u6368\u4e94\u5165\n    static std::pair&lt;double, int&gt; scientificNotationRound(double value, int significant_digits) {\n        if (value == 0.0) return {0.0, 0};\n\n        int exponent = static_cast&lt;int&gt;(std::floor(std::log10(std::abs(value))));\n        double mantissa = value \/ std::pow(10.0, exponent);\n\n        mantissa = std::round(mantissa * std::pow(10.0, significant_digits - 1)) \/ \n                  std::pow(10.0, significant_digits - 1);\n\n        return {mantissa, exponent};\n    }\n\n    \/\/ \u7bc4\u56f2\u3092\u6307\u5b9a\u3057\u305f\u56db\u6368\u4e94\u5165\n    template&lt;typename T&gt;\n    static T roundWithinRange(double value, T min_value, T max_value) {\n        double rounded = std::round(value);\n        return static_cast&lt;T&gt;(std::clamp(rounded, static_cast&lt;double&gt;(min_value), \n                                                static_cast&lt;double&gt;(max_value)));\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid demonstratePrecisionRounding() {\n    PrecisionRounder rounder;\n\n    \/\/ \u6709\u52b9\u6570\u5b57\u3067\u306e\u56db\u6368\u4e94\u5165\n    std::cout &lt;&lt; rounder.roundToSignificantDigits(123.456, 4) &lt;&lt; std::endl;  \/\/ 123.5\n\n    \/\/ \u79d1\u5b66\u7684\u8868\u8a18\u6cd5\u3067\u306e\u56db\u6368\u4e94\u5165\n    auto [mantissa, exponent] = rounder.scientificNotationRound(12345.67, 3);\n    std::cout &lt;&lt; mantissa &lt;&lt; \"e\" &lt;&lt; exponent &lt;&lt; std::endl;  \/\/ 1.23e4\n\n    \/\/ \u7bc4\u56f2\u6307\u5b9a\u3067\u306e\u56db\u6368\u4e94\u5165\n    std::cout &lt;&lt; rounder.roundWithinRange&lt;int&gt;(123.6, 0, 100) &lt;&lt; std::endl;  \/\/ 100\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u5fdc\u3058\u3066\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u91d1\u878d\u53d6\u5f15\u5411\u3051\u5b9f\u88c5\u306f\u3001\u6b63\u78ba\u6027\u3068\u516c\u5e73\u6027\u3092\u91cd\u8996<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u91cd\u8996\u306e\u5b9f\u88c5\u306f\u3001SIMD\u547d\u4ee4\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u6700\u9069\u5316\u3092\u6d3b\u7528<\/li>\n\n\n\n<li>\u7cbe\u5ea6\u6307\u5b9a\u306e\u5b9f\u88c5\u306f\u3001\u67d4\u8edf\u6027\u3068\u518d\u5229\u7528\u6027\u3092\u91cd\u8996<\/li>\n<\/ol>\n\n\n\n<p>\u5b9f\u969b\u306e\u4f7f\u7528\u6642\u306b\u306f\u3001\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u5b9f\u88c5\u3092\u9078\u629e\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-10\">\u56db\u6368\u4e94\u5165\u306b\u304a\u3051\u308b\u7cbe\u5ea6\u3068\u30a8\u30e9\u30fc\u51e6\u7406<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u7cbe\u5ea6\u9650\u754c\u3078\u306e\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<p>\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u7cbe\u5ea6\u9650\u754c\u306f\u3001\u56db\u6368\u4e94\u5165\u64cd\u4f5c\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u8ab2\u984c\u3068\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001\u4e3b\u306a\u554f\u984c\u70b9\u3068\u305d\u306e\u5bfe\u51e6\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;cmath&gt;\n#include &lt;limits&gt;\n#include &lt;stdexcept&gt;\n#include &lt;iostream&gt;\n\nclass PrecisionHandler {\nprivate:\n    \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u306e\u6bd4\u8f03\u7528\u30a4\u30d7\u30b7\u30ed\u30f3\n    static constexpr double epsilon = std::numeric_limits&lt;double&gt;::epsilon() * 100;\n\npublic:\n    \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u6bd4\u8f03\n    static bool isApproximatelyEqual(double a, double b) {\n        return std::abs(a - b) &lt;= epsilon * std::max(std::abs(a), std::abs(b));\n    }\n\n    \/\/ \u7cbe\u5ea6\u3092\u8003\u616e\u3057\u305f\u56db\u6368\u4e94\u5165\n    static double preciseRound(double value, int places) {\n        \/\/ \u6709\u52b9\u6841\u6570\u30c1\u30a7\u30c3\u30af\n        if (places &gt; std::numeric_limits&lt;double&gt;::digits10) {\n            throw std::invalid_argument(\"Requested precision exceeds double precision\");\n        }\n\n        \/\/ \u30b9\u30b1\u30fc\u30eb\u30d5\u30a1\u30af\u30bf\u30fc\u306e\u8a08\u7b97\n        double scale = std::pow(10.0, places);\n        double scaled = value * scale;\n\n        \/\/ \u4e38\u3081\u8aa4\u5dee\u306e\u88dc\u6b63\n        if (std::abs(scaled - std::round(scaled)) &lt; epsilon) {\n            scaled = std::round(scaled);\n        }\n\n        return scaled \/ scale;\n    }\n\n    \/\/ \u6570\u5024\u306e\u6b63\u898f\u5316\u30c1\u30a7\u30c3\u30af\n    static bool isNormalNumber(double value) {\n        return std::fpclassify(value) == FP_NORMAL;\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid demonstratePrecisionHandling() {\n    PrecisionHandler handler;\n\n    \/\/ \u7cbe\u5ea6\u306e\u554f\u984c\u304c\u3042\u308b\u4f8b\n    double problematic = 2.675;\n    std::cout &lt;&lt; std::fixed &lt;&lt; std::setprecision(15);\n    std::cout &lt;&lt; \"Raw value: \" &lt;&lt; problematic &lt;&lt; std::endl;\n    std::cout &lt;&lt; \"Precise rounded: \" &lt;&lt; handler.preciseRound(problematic, 2) &lt;&lt; std::endl;\n\n    \/\/ \u975e\u6b63\u898f\u5316\u6570\u306e\u30c1\u30a7\u30c3\u30af\n    double tiny = std::numeric_limits&lt;double&gt;::denorm_min();\n    std::cout &lt;&lt; \"Is normal: \" &lt;&lt; std::boolalpha &lt;&lt; handler.isNormalNumber(tiny) &lt;&lt; std::endl;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3068\u30a2\u30f3\u30c0\u30fc\u30d5\u30ed\u30fc\u306e\u9632\u6b62\u7b56<\/h3>\n\n\n\n<p>\u6570\u5024\u8a08\u7b97\u306b\u304a\u3051\u308b\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3068\u30a2\u30f3\u30c0\u30fc\u30d5\u30ed\u30fc\u306f\u3001\u6df1\u523b\u306a\u30d0\u30b0\u306e\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u3092\u9069\u5207\u306b\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class NumericRangeHandler {\nprivate:\n    template&lt;typename T&gt;\n    static bool willMultiplicationOverflow(T a, T b) {\n        if (a &gt; 0) {\n            if (b &gt; 0) {\n                return a &gt; std::numeric_limits&lt;T&gt;::max() \/ b;\n            }\n            return b &lt; std::numeric_limits&lt;T&gt;::min() \/ a;\n        }\n        if (b &gt; 0) {\n            return a &lt; std::numeric_limits&lt;T&gt;::min() \/ b;\n        }\n        return a != 0 &amp;&amp; b &lt; std::numeric_limits&lt;T&gt;::max() \/ a;\n    }\n\npublic:\n    \/\/ \u5b89\u5168\u306a\u56db\u6368\u4e94\u5165\u5b9f\u88c5\n    static double safeRound(double value, int places) {\n        try {\n            \/\/ \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\n            if (std::isnan(value) || std::isinf(value)) {\n                throw std::domain_error(\"Input is NaN or infinite\");\n            }\n\n            \/\/ \u30b9\u30b1\u30fc\u30eb\u30d5\u30a1\u30af\u30bf\u30fc\u306e\u8a08\u7b97\u3068\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u30c1\u30a7\u30c3\u30af\n            double scale = std::pow(10.0, std::abs(places));\n            if (willMultiplicationOverflow(value, scale)) {\n                throw std::overflow_error(\"Scaling would cause overflow\");\n            }\n\n            \/\/ \u30a2\u30f3\u30c0\u30fc\u30d5\u30ed\u30fc\u30c1\u30a7\u30c3\u30af\n            if (std::abs(value) &lt; std::numeric_limits&lt;double&gt;::min() * scale) {\n                return 0.0;  \/\/ \u5024\u304c\u5c0f\u3055\u3059\u304e\u308b\u5834\u5408\u306f0\u3092\u8fd4\u3059\n            }\n\n            \/\/ \u56db\u6368\u4e94\u5165\u306e\u5b9f\u884c\n            double scaled = value * scale;\n            return std::round(scaled) \/ scale;\n        } catch (const std::exception&amp; e) {\n            \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u8a18\u9332\n            std::cerr &lt;&lt; \"Error in safeRound: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n            throw;  \/\/ \u4e0a\u4f4d\u5c64\u3067\u306e\u51e6\u7406\u306e\u305f\u3081\u306b\u518d\u30b9\u30ed\u30fc\n        }\n    }\n\n    \/\/ \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u56db\u6368\u4e94\u5165\n    template&lt;typename T&gt;\n    static T boundedRound(double value, T min_bound, T max_bound) {\n        if (value &lt; static_cast&lt;double&gt;(min_bound) || \n            value &gt; static_cast&lt;double&gt;(max_bound)) {\n            throw std::out_of_range(\"Value outside allowed range\");\n        }\n\n        return static_cast&lt;T&gt;(std::round(value));\n    }\n\n    \/\/ \u30a8\u30e9\u30fc\u56de\u5fa9\u6a5f\u80fd\u4ed8\u304d\u56db\u6368\u4e94\u5165\n    static double resilientRound(double value, int places, double fallback) {\n        try {\n            return safeRound(value, places);\n        } catch (const std::exception&amp;) {\n            return fallback;  \/\/ \u30a8\u30e9\u30fc\u6642\u306f\u6307\u5b9a\u3055\u308c\u305f\u5024\u3092\u8fd4\u3059\n        }\n    }\n};\n\n\/\/ \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u5b9f\u88c5\u4f8b\nvoid errorHandlingExample() {\n    NumericRangeHandler handler;\n\n    try {\n        \/\/ \u901a\u5e38\u306e\u4f7f\u7528\u4f8b\n        double result1 = handler.safeRound(123.456, 2);\n\n        \/\/ \u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\u306e\u4f7f\u7528\u4f8b\n        int result2 = handler.boundedRound(123.456, 0, 1000);\n\n        \/\/ \u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u4ed8\u304d\u306e\u4f7f\u7528\u4f8b\n        double result3 = handler.resilientRound(1e308, 2, 0.0);\n\n    } catch (const std::overflow_error&amp; e) {\n        std::cerr &lt;&lt; \"Overflow error: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    } catch (const std::out_of_range&amp; e) {\n        std::cerr &lt;&lt; \"Range error: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    } catch (const std::exception&amp; e) {\n        std::cerr &lt;&lt; \"Unexpected error: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7cbe\u5ea6\u306e\u4fdd\u8a3c:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a4\u30d7\u30b7\u30ed\u30f3\u3092\u4f7f\u7528\u3057\u305f\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u6bd4\u8f03<\/li>\n\n\n\n<li>\u6709\u52b9\u6841\u6570\u306e\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u975e\u6b63\u898f\u5316\u6570\u306e\u691c\u51fa\u3068\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u51e6\u7406:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\/\u30a2\u30f3\u30c0\u30fc\u30d5\u30ed\u30fc\u306e\u4e8b\u524d\u691c\u51fa<\/li>\n\n\n\n<li>\u4f8b\u5916\u3092\u4f7f\u7528\u3057\u305f\u9069\u5207\u306a\u30a8\u30e9\u30fc\u901a\u77e5<\/li>\n\n\n\n<li>\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u6a5f\u80fd\u306e\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u56de\u5fa9\u6a5f\u80fd:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u767a\u751f\u6642\u306e\u4ee3\u66ff\u5024\u306e\u63d0\u4f9b<\/li>\n\n\n\n<li>\u30ed\u30b0\u8a18\u9332\u306b\u3088\u308b\u30c7\u30d0\u30c3\u30b0\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li>\u6bb5\u968e\u7684\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u6226\u7565<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5805\u7262\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u56db\u6368\u4e94\u5165\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u306e\u56db\u6368\u4e94\u5165\u306e\u5b9f\u88c5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u7570\u306a\u308b\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u306e\u52d5\u4f5c\u306e\u9055\u3044\u3068\u5bfe\u7b56<\/h3>\n\n\n\n<p>\u5404\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3084\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u3063\u3066\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u6271\u3044\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u9055\u3044\u306b\u5bfe\u5fdc\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;cmath&gt;\n#include &lt;cfenv&gt;\n\nclass CrossPlatformRounder {\nprivate:\n    \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u56fa\u6709\u306e\u8a2d\u5b9a\u3092\u691c\u51fa\n    static bool isFeatureSupported() {\n        #if defined(_MSC_VER)  \/\/ Visual Studio\n            return true;\n        #elif defined(__GNUC__)  \/\/ GCC\n            return true;\n        #elif defined(__clang__)  \/\/ Clang\n            return true;\n        #else\n            return false;\n        #endif\n    }\n\n    \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u74b0\u5883\u306e\u8a2d\u5b9a\u3092\u4fdd\u5b58\u30fb\u5fa9\u5143\u3059\u308bRAII\u30af\u30e9\u30b9\n    class FenvGuard {\n    private:\n        std::fenv_t saved_fenv;\n    public:\n        FenvGuard() {\n            std::fegetenv(&amp;saved_fenv);\n        }\n        ~FenvGuard() {\n            std::fesetenv(&amp;saved_fenv);\n        }\n    };\n\npublic:\n    \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4e92\u63db\u306e\u56db\u6368\u4e94\u5165\u5b9f\u88c5\n    static double platformIndependentRound(double value) {\n        \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u74b0\u5883\u306e\u4e00\u6642\u7684\u306a\u4fdd\u5b58\n        FenvGuard guard;\n\n        #if defined(_MSC_VER)\n            _controlfp(_RC_NEAR, _MCW_RC);  \/\/ Windows\u5411\u3051\u4e38\u3081\u30e2\u30fc\u30c9\u8a2d\u5b9a\n        #else\n            std::fesetround(FE_TONEAREST);  \/\/ POSIX\u5411\u3051\u4e38\u3081\u30e2\u30fc\u30c9\u8a2d\u5b9a\n        #endif\n\n        return std::round(value);\n    }\n\n    \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u56fa\u6709\u306e\u6700\u9069\u5316\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\n    static double optimizedRound(double value) {\n        #if defined(_MSC_VER) &amp;&amp; defined(_M_X64)\n            \/\/ Windows x64\u5411\u3051\u6700\u9069\u5316\n            return _mm_cvtsd_f64(_mm_round_sd(_mm_set_sd(value), _mm_set_sd(0.0), \n                                _MM_FROUND_TO_NEAREST_INT));\n        #elif defined(__GNUC__) &amp;&amp; defined(__SSE4_1__)\n            \/\/ GCC\/SSE4.1\u5411\u3051\u6700\u9069\u5316\n            return __builtin_round(value);\n        #else\n            \/\/ \u6c4e\u7528\u5b9f\u88c5\n            return std::round(value);\n        #endif\n    }\n};\n\n\/\/ \u30b3\u30f3\u30d1\u30a4\u30e9\u56fa\u6709\u306e\u8b66\u544a\u3092\u5236\u5fa1\nclass WarningController {\npublic:\n    static void suppressWarnings() {\n        #if defined(_MSC_VER)\n            #pragma warning(push)\n            #pragma warning(disable: 4723)  \/\/ \u6f5c\u5728\u7684\u306a\u30bc\u30ed\u9664\u7b97\n        #elif defined(__GNUC__)\n            #pragma GCC diagnostic push\n            #pragma GCC diagnostic ignored \"-Wfloat-equal\"\n        #endif\n    }\n\n    static void restoreWarnings() {\n        #if defined(_MSC_VER)\n            #pragma warning(pop)\n        #elif defined(__GNUC__)\n            #pragma GCC diagnostic pop\n        #endif\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u72ec\u7acb\u306a\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u958b\u767a\u3067\u306f\u3001\u79fb\u690d\u6027\u3068\u4fdd\u5b88\u6027\u3092\u91cd\u8996\u3057\u305f\u5b9f\u88c5\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class PortableRoundingImplementation {\nprivate:\n    \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u975e\u4f9d\u5b58\u306e\u5b9a\u6570\u5b9a\u7fa9\n    static constexpr double EPSILON = 1e-10;\n\n    \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u5b9a\u6570\u306e\u5229\u7528\n    template&lt;typename T&gt;\n    static constexpr bool isPowerOfTwo(T value) {\n        return value &gt; 0 &amp;&amp; (value &amp; (value - 1)) == 0;\n    }\n\npublic:\n    \/\/ \u79fb\u690d\u6027\u306e\u9ad8\u3044\u5b9f\u88c5\n    template&lt;typename T&gt;\n    static T portableRound(double value) {\n        static_assert(std::is_arithmetic&lt;T&gt;::value, \n                     \"Template parameter must be an arithmetic type\");\n\n        \/\/ \u7121\u9650\u5927\u3068NaN\u306e\u30c1\u30a7\u30c3\u30af\n        if (!std::isfinite(value)) {\n            throw std::domain_error(\"Input must be a finite number\");\n        }\n\n        \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u975e\u4f9d\u5b58\u306e\u5b9f\u88c5\n        double integer_part;\n        double fractional_part = std::modf(value, &amp;integer_part);\n\n        if (std::abs(fractional_part) &lt; EPSILON) {\n            return static_cast&lt;T&gt;(integer_part);\n        }\n\n        if (fractional_part &gt; 0.5 || \n            (std::abs(fractional_part - 0.5) &lt; EPSILON &amp;&amp; integer_part &gt;= 0)) {\n            integer_part += 1.0;\n        } else if (fractional_part &lt; -0.5 || \n                   (std::abs(fractional_part + 0.5) &lt; EPSILON &amp;&amp; integer_part &lt; 0)) {\n            integer_part -= 1.0;\n        }\n\n        return static_cast&lt;T&gt;(integer_part);\n    }\n\n    \/\/ \u7570\u306a\u308b\u6570\u5024\u578b\u9593\u306e\u5b89\u5168\u306a\u5909\u63db\n    template&lt;typename From, typename To&gt;\n    static To safeCast(From value) {\n        static_assert(std::is_arithmetic&lt;From&gt;::value &amp;&amp; std::is_arithmetic&lt;To&gt;::value,\n                     \"Both types must be arithmetic\");\n\n        if (value &gt; static_cast&lt;From&gt;(std::numeric_limits&lt;To&gt;::max()) ||\n            value &lt; static_cast&lt;From&gt;(std::numeric_limits&lt;To&gt;::min())) {\n            throw std::overflow_error(\"Value cannot be safely converted\");\n        }\n\n        return static_cast&lt;To&gt;(value);\n    }\n\n    \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u6f14\u7b97\u306e\u79fb\u690d\u6027\u30c1\u30a7\u30c3\u30af\n    static void verifyPortability() {\n        \/\/ IEEE\u306e\u6d6e\u52d5\u5c0f\u6570\u70b9\u5f62\u5f0f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u304b\u78ba\u8a8d\n        static_assert(std::numeric_limits&lt;double&gt;::is_iec559,\n                     \"IEEE 754 floating-point format is required\");\n\n        \/\/ \u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u306e\u78ba\u8a8d\n        const int endian_check = 1;\n        const bool is_little_endian = *reinterpret_cast&lt;const char*&gt;(&amp;endian_check) == 1;\n\n        if (!is_little_endian) {\n            std::cerr &lt;&lt; \"Warning: Running on big-endian platform\" &lt;&lt; std::endl;\n        }\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid demonstrateCrossPlatformRounding() {\n    CrossPlatformRounder rounder;\n    PortableRoundingImplementation portable;\n\n    \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u4e92\u63db\u306e\u56db\u6368\u4e94\u5165\n    double value1 = 3.5;\n    std::cout &lt;&lt; rounder.platformIndependentRound(value1) &lt;&lt; std::endl;\n\n    \/\/ \u79fb\u690d\u6027\u306e\u9ad8\u3044\u5b9f\u88c5\u306e\u4f7f\u7528\n    try {\n        int rounded = portable.portableRound&lt;int&gt;(value1);\n        std::cout &lt;&lt; rounded &lt;&lt; std::endl;\n\n        \/\/ \u5927\u304d\u306a\u5024\u306e\u5b89\u5168\u306a\u5909\u63db\n        long large_value = portable.safeCast&lt;double, long&gt;(1e10);\n        std::cout &lt;&lt; large_value &lt;&lt; std::endl;\n    } catch (const std::exception&amp; e) {\n        std::cerr &lt;&lt; \"Error: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    }\n}<\/pre>\n\n\n\n<p>\u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30e9\u5bfe\u5fdc:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ea\u30d7\u30ed\u30bb\u30c3\u30b5\u30de\u30af\u30ed\u3092\u4f7f\u7528\u3057\u305f\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u691c\u51fa<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30e9\u56fa\u6709\u306e\u6700\u9069\u5316\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5236\u5fa1<\/li>\n\n\n\n<li>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u56fa\u6709\u306e\u8b66\u544a\u306e\u7ba1\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u79fb\u690d\u6027\u306e\u78ba\u4fdd:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u975e\u4f9d\u5b58\u306e\u5b9a\u6570\u3068\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u6d3b\u7528\u3057\u305f\u578b\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u4f8b\u5916\u51e6\u7406\u306b\u3088\u308b\u5b89\u5168\u306a\u5883\u754c\u5024\u30c1\u30a7\u30c3\u30af<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6027\u80fd\u6700\u9069\u5316:<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u56fa\u6709\u306e\u6700\u9069\u5316\u547d\u4ee4\u306e\u5229\u7528<\/li>\n\n\n\n<li>RAII\u624b\u6cd5\u306b\u3088\u308b\u8cc7\u6e90\u7ba1\u7406<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u6700\u9069\u5316\u306e\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u7570\u306a\u308b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u3082\u4e00\u8cab\u3057\u305f\u52d5\u4f5c\u3068\u6700\u9069\u306a\u6027\u80fd\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">\u56db\u6368\u4e94\u5165\u306e\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u5b9f\u88c5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3092\u8003\u616e\u3057\u305f\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u8a2d\u8a08<\/h3>\n\n\n\n<p>\u56db\u6368\u4e94\u5165\u51e6\u7406\u306e\u30c6\u30b9\u30c8\u3067\u306f\u3001\u901a\u5e38\u306e\u30b1\u30fc\u30b9\u3060\u3051\u3067\u306a\u304f\u3001\u69d8\u3005\u306a\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u3001Google Test\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u4f7f\u7528\u3057\u305f\u5305\u62ec\u7684\u306a\u30c6\u30b9\u30c8\u30b9\u30a4\u30fc\u30c8\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;gtest\/gtest.h&gt;\n#include &lt;cmath&gt;\n#include &lt;limits&gt;\n#include &lt;vector&gt;\n\n\/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30af\u30e9\u30b9\uff08\u524d\u8ff0\u306e\u5b9f\u88c5\u304b\u3089\uff09\nclass RoundingImplementation {\npublic:\n    static double round(double value, int places) {\n        double scale = std::pow(10.0, places);\n        return std::round(value * scale) \/ scale;\n    }\n};\n\n\/\/ \u57fa\u672c\u7684\u306a\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\nclass RoundingBasicTest : public ::testing::Test {\nprotected:\n    RoundingImplementation rounder;\n\n    \/\/ \u8a31\u5bb9\u8aa4\u5dee\u306e\u5b9a\u7fa9\n    static constexpr double epsilon = 1e-10;\n\n    \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u6bd4\u8f03\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\n    bool isApproximatelyEqual(double a, double b) {\n        return std::abs(a - b) &lt;= epsilon * std::max(std::abs(a), std::abs(b));\n    }\n};\n\n\/\/ \u57fa\u672c\u7684\u306a\u56db\u6368\u4e94\u5165\u306e\u30c6\u30b9\u30c8\nTEST_F(RoundingBasicTest, BasicRoundingCases) {\n    \/\/ \u901a\u5e38\u306e\u56db\u6368\u4e94\u5165\u30b1\u30fc\u30b9\n    EXPECT_TRUE(isApproximatelyEqual(rounder.round(3.14159, 2), 3.14));\n    EXPECT_TRUE(isApproximatelyEqual(rounder.round(3.14559, 2), 3.15));\n\n    \/\/ \u30bc\u30ed\u4ed8\u8fd1\u306e\u5024\n    EXPECT_TRUE(isApproximatelyEqual(rounder.round(0.0001, 2), 0.00));\n    EXPECT_TRUE(isApproximatelyEqual(rounder.round(-0.0001, 2), 0.00));\n\n    \/\/ \u6574\u6570\u5024\n    EXPECT_TRUE(isApproximatelyEqual(rounder.round(100.0, 2), 100.00));\n    EXPECT_TRUE(isApproximatelyEqual(rounder.round(-100.0, 2), -100.00));\n}\n\n\/\/ \u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306e\u30c6\u30b9\u30c8\nclass RoundingEdgeCaseTest : public RoundingBasicTest {\nprotected:\n    void SetUp() override {\n        \/\/ \u30c6\u30b9\u30c8\u3054\u3068\u306e\u521d\u671f\u5316\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3053\u3053\u306b\u8a18\u8ff0\n    }\n};\n\nTEST_F(RoundingEdgeCaseTest, ExtremeValues) {\n    \/\/ \u6700\u5927\u5024\u4ed8\u8fd1\n    EXPECT_NO_THROW(rounder.round(std::numeric_limits&lt;double&gt;::max(), 2));\n\n    \/\/ \u6700\u5c0f\u5024\u4ed8\u8fd1\n    EXPECT_NO_THROW(rounder.round(std::numeric_limits&lt;double&gt;::min(), 2));\n\n    \/\/ \u975e\u6b63\u898f\u5316\u6570\n    EXPECT_NO_THROW(rounder.round(std::numeric_limits&lt;double&gt;::denorm_min(), 2));\n}\n\nTEST_F(RoundingEdgeCaseTest, SpecialValues) {\n    \/\/ NaN\u306e\u51e6\u7406\n    EXPECT_TRUE(std::isnan(rounder.round(std::numeric_limits&lt;double&gt;::quiet_NaN(), 2)));\n\n    \/\/ \u7121\u9650\u5927\u306e\u51e6\u7406\n    EXPECT_TRUE(std::isinf(rounder.round(std::numeric_limits&lt;double&gt;::infinity(), 2)));\n    EXPECT_TRUE(std::isinf(rounder.round(-std::numeric_limits&lt;double&gt;::infinity(), 2)));\n}\n\n\/\/ \u5883\u754c\u5024\u306e\u30c6\u30b9\u30c8\nclass RoundingBoundaryTest : public RoundingBasicTest {\nprotected:\n    struct TestCase {\n        double input;\n        int places;\n        double expected;\n    };\n\n    std::vector&lt;TestCase&gt; getBoundaryTestCases() {\n        return {\n            {5.5, 0, 6.0},    \/\/ \u5178\u578b\u7684\u306a\u5883\u754c\n            {-5.5, 0, -6.0},  \/\/ \u8ca0\u306e\u6570\u306e\u5883\u754c\n            {2.5, 0, 3.0},    \/\/ 0.5\u3067\u306e\u5207\u308a\u4e0a\u3052\n            {-2.5, 0, -3.0},  \/\/ -0.5\u3067\u306e\u5207\u308a\u4e0b\u3052\n            {2.05, 1, 2.1},   \/\/ \u5c0f\u6570\u70b9\u4ee5\u4e0b1\u6841\u3067\u306e\u5883\u754c\n            {2.995, 2, 3.00}  \/\/ \u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u3067\u306e\u5883\u754c\n        };\n    }\n};\n\nTEST_F(RoundingBoundaryTest, BoundaryValues) {\n    for (const auto&amp; test_case : getBoundaryTestCases()) {\n        EXPECT_TRUE(isApproximatelyEqual(\n            rounder.round(test_case.input, test_case.places),\n            test_case.expected\n        )) &lt;&lt; \"Failed for input: \" &lt;&lt; test_case.input \n           &lt;&lt; \", places: \" &lt;&lt; test_case.places;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u7570\u306a\u308b\u5165\u529b\u5024\u3067\u306e\u52d5\u4f5c\u691c\u8a3c\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u69d8\u3005\u306a\u5165\u529b\u30d1\u30bf\u30fc\u30f3\u306b\u5bfe\u3059\u308b\u52d5\u4f5c\u3092\u691c\u8a3c\u3059\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class RoundingParameterizedTest : \n    public RoundingBasicTest,\n    public ::testing::WithParamInterface&lt;std::tuple&lt;double, int, double&gt;&gt; {\nprotected:\n    double getInput() const { return std::get&lt;0&gt;(GetParam()); }\n    int getPlaces() const { return std::get&lt;1&gt;(GetParam()); }\n    double getExpected() const { return std::get&lt;2&gt;(GetParam()); }\n};\n\n\/\/ \u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30c6\u30b9\u30c8\u306e\u5b9f\u884c\nTEST_P(RoundingParameterizedTest, ParameterizedRounding) {\n    EXPECT_TRUE(isApproximatelyEqual(\n        rounder.round(getInput(), getPlaces()),\n        getExpected()\n    )) &lt;&lt; \"Failed for input: \" &lt;&lt; getInput() \n       &lt;&lt; \", places: \" &lt;&lt; getPlaces();\n}\n\n\/\/ \u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u5b9a\u7fa9\nINSTANTIATE_TEST_SUITE_P(\n    RoundingTests,\n    RoundingParameterizedTest,\n    ::testing::Values(\n        std::make_tuple(3.14159, 2, 3.14),\n        std::make_tuple(3.14559, 2, 3.15),\n        std::make_tuple(3.999999, 2, 4.00),\n        std::make_tuple(-3.14159, 2, -3.14),\n        std::make_tuple(-3.14559, 2, -3.15),\n        std::make_tuple(0.0, 2, 0.00)\n    )\n);\n\n\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\nclass RoundingPerformanceTest : public RoundingBasicTest {\nprotected:\n    static constexpr size_t ITERATIONS = 1000000;\n    std::vector&lt;double&gt; test_data;\n\n    void SetUp() override {\n        test_data.reserve(ITERATIONS);\n        for (size_t i = 0; i &lt; ITERATIONS; ++i) {\n            test_data.push_back(static_cast&lt;double&gt;(i) \/ 1000.0);\n        }\n    }\n};\n\nTEST_F(RoundingPerformanceTest, BulkRoundingPerformance) {\n    auto start = std::chrono::high_resolution_clock::now();\n\n    for (const auto&amp; value : test_data) {\n        volatile double result = rounder.round(value, 2);\n        (void)result;  \/\/ \u6700\u9069\u5316\u306e\u9632\u6b62\n    }\n\n    auto end = std::chrono::high_resolution_clock::now();\n    auto duration = std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(end - start);\n\n    \/\/ \u5b9f\u884c\u6642\u9593\u306e\u691c\u8a3c\n    EXPECT_LT(duration.count(), 1000)  \/\/ 1\u79d2\u672a\u6e80\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\n        &lt;&lt; \"Performance test took \" &lt;&lt; duration.count() &lt;&lt; \"ms\";\n}\n\n\/\/ \u30ab\u30d0\u30ec\u30c3\u30b8\u5411\u4e0a\u306e\u305f\u3081\u306e\u8ffd\u52a0\u30c6\u30b9\u30c8\nTEST_F(RoundingBasicTest, RoundingPrecisionLimits) {\n    \/\/ \u69d8\u3005\u306a\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\u3067\u306e\u30c6\u30b9\u30c8\n    for (int places = 0; places &lt;= 15; ++places) {\n        double value = 1.0 \/ std::pow(10.0, places);\n        EXPECT_NO_THROW(rounder.round(value, places))\n            &lt;&lt; \"Failed for places: \" &lt;&lt; places;\n    }\n}<\/pre>\n\n\n\n<p>\u30c6\u30b9\u30c8\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u7db2\u7f85\u6027\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u30b1\u30fc\u30b9<\/li>\n\n\n\n<li>\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9<\/li>\n\n\n\n<li>\u5883\u754c\u5024<\/li>\n\n\n\n<li>\u7279\u6b8a\u306a\u5165\u529b\u5024<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u8a2d\u8a08\u306e\u539f\u5247\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5404\u30c6\u30b9\u30c8\u306f\u72ec\u7acb\u3057\u3066\u5b9f\u884c\u53ef\u80fd<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u306e\u610f\u56f3\u304c\u660e\u78ba<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u6709\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8003\u616e\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b9f\u884c\u6642\u9593\u306e\u6e2c\u5b9a<\/li>\n\n\n\n<li>\u30ea\u30bd\u30fc\u30b9\u4f7f\u7528\u306e\u78ba\u8a8d<\/li>\n\n\n\n<li>\u6700\u9069\u5316\u306e\u5f71\u97ff\u306e\u8003\u616e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u306e\u69cb\u9020\u5316<\/li>\n\n\n\n<li>\u5171\u901a\u6a5f\u80fd\u306e\u62bd\u51fa<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30b9\u30c8\u306b\u3088\u308a\u3001\u56db\u6368\u4e94\u5165\u5b9f\u88c5\u306e\u4fe1\u983c\u6027\u3068\u54c1\u8cea\u3092\u78ba\u4fdd\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-2215","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\/2215","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=2215"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2215\/revisions"}],"predecessor-version":[{"id":2216,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2215\/revisions\/2216"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}