{"id":2199,"date":"2025-03-24T08:48:02","date_gmt":"2025-03-23T23:48:02","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2199"},"modified":"2025-03-24T08:48:27","modified_gmt":"2025-03-23T23:48:27","slug":"%e3%80%90%e4%bf%9d%e5%ae%88%e6%80%a7%e6%8a%9c%e7%be%a4%e3%80%91c%e3%81%ae%e3%82%af%e3%83%a9%e3%82%b9%e7%b6%99%e6%89%bf%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%892024-%e3%80%9c%e8%a8%ad%e8%a8%88","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2199","title":{"rendered":"\u3010\u4fdd\u5b88\u6027\u629c\u7fa4\u3011C++\u306e\u30af\u30e9\u30b9\u7d99\u627f\u5b8c\u5168\u30ac\u30a4\u30c92024 \u301c\u8a2d\u8a08\u306e\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u30d1\u30bf\u30fc\u30f3\u307e\u3067\u301c"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">\u30af\u30e9\u30b9\u7d99\u627f\u3068\u306f\uff1f\u6ce8\u76ee\u3059\u3079\u304d\u57fa\u790e\u6982\u5ff5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u7d99\u627f\u306e\u5b9a\u7fa9\u3068\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-2\">\u57fa\u5e95\u30af\u30e9\u30b9\u3068\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u95a2\u4fc2\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">\u7d99\u627f\u306b\u3088\u308b\u62e1\u5f35\u306e\u4ed5\u7d44\u307f<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">C++\u306b\u304a\u3051\u308b\u7d99\u627f\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u57fa\u672c\u7684\u306a\u7d99\u627f\u306e\u66f8\u304d\u65b9\u3068\u30b7\u30f3\u30bf\u30c3\u30af\u30b9<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u30a2\u30af\u30bb\u30b9\u6307\u5b9a\u5b50\u306e\u4fbf\u5229\uff08public\u3001protected\u3001private\uff09<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u52d5\u4f5c<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">\u5b9f\u8df5\u7d99\u627f\u30d1\u30bf\u30fc\u30f3\u3068\u4f7f\u7528\u30b7\u30fc\u30f3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">\u5358\u4e00\u7d99\u627fvs\u591a\u91cd\u7d99\u627f\u306e\u9078\u629e\u57fa\u6e96<\/a>      <\/li>      <li>        <a href=\"#i-12\">\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u3057\u3066\u306e\u7d14\u7c8b\u4eee\u60f3\u95a2\u6570\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-13\">\u7d99\u627f\u3092\u6d3b\u7528\u3057\u305f\u52b9\u679c\u7684\u306a\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u5b9f\u88c5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">\u7d99\u627f\u8a2d\u8a08\u3067\u3088\u304f\u3042\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u89e3\u6c7a\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">\u83f1\u5f62\u7d99\u627f\u554f\u984c\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u5bfe\u7b56\u3068\u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u91cd\u8981\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-20\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30b9\u30e9\u30a4\u30b7\u30f3\u30b0\u554f\u984c\u306e\u5bfe\u51e6\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-22\">\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u7d99\u627f\u8a2d\u8a08\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-23\">LSP\u306b\u57fa\u3065\u304f\u7d99\u627f\u306e\u8a2d\u8a08\u624b\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-24\">\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u69cb\u9020<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-25\">\u5c06\u6765\u306e\u62e1\u5f35\u3092\u898b\u636e\u3048\u305f\u8a2d\u8a08\u306e\u30dd\u30a4\u30f3\u30c8<\/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\">\u30af\u30e9\u30b9\u7d99\u627f\u3068\u306f\uff1f\u6ce8\u76ee\u3059\u3079\u304d\u57fa\u790e\u6982\u5ff5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u7d99\u627f\u306e\u5b9a\u7fa9\u3068\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<p>\u30af\u30e9\u30b9\u7d99\u627f\u3068\u306f\u3001\u65e2\u5b58\u306e\u30af\u30e9\u30b9\uff08\u57fa\u5e95\u30af\u30e9\u30b9\uff09\u306e\u7279\u6027\u3092\u65b0\u3057\u3044\u30af\u30e9\u30b9\uff08\u6d3e\u751f\u30af\u30e9\u30b9\uff09\u306b\u5f15\u304d\u7d99\u304e\u3001\u6a5f\u80fd\u3092\u62e1\u5f35\u307e\u305f\u306f\u7279\u5316\u3055\u305b\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u3053\u308c\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u91cd\u8981\u306a\u67f1\u306e\u4e00\u3064\u3067\u3001\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u5f37\u529b\u306a\u624b\u6bb5\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e3b\u306a\u5229\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5171\u901a\u6a5f\u80fd\u3092\u57fa\u5e95\u30af\u30e9\u30b9\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u91cd\u8907\u30b3\u30fc\u30c9\u3092\u524a\u6e1b<\/li>\n\n\n\n<li>\u65e2\u5b58\u306e\u691c\u8a3c\u6e08\u307f\u30b3\u30fc\u30c9\u3092\u6d3b\u7528\u3057\u3001\u958b\u767a\u52b9\u7387\u3092\u5411\u4e0a<\/li>\n\n\n\n<li>\u30d0\u30b0\u4fee\u6b63\u306e\u5f71\u97ff\u7bc4\u56f2\u3092\u6700\u5c0f\u9650\u306b\u6291\u5236<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u62bd\u8c61\u5316\u306b\u3088\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u7d71\u4e00<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5171\u901a\u306e\u64cd\u4f5c\u3092\u57fa\u5e95\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3057\u3001\u4e00\u8cab\u3057\u305f\u64cd\u4f5c\u65b9\u6cd5\u3092\u63d0\u4f9b<\/li>\n\n\n\n<li>\u65b0\u3057\u3044\u6a5f\u80fd\u8ffd\u52a0\u6642\u306e\u8a2d\u8a08\u6307\u91dd\u3092\u660e\u78ba\u5316<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u5411\u4e0a<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u57fa\u5e95\u30af\u30e9\u30b9\u3068\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u95a2\u4fc2\u6027<\/h3>\n\n\n\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u3068\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u95a2\u4fc2\u306f\u300cis-a\u95a2\u4fc2\u300d\u3068\u3057\u3066\u8868\u73fe\u3055\u308c\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u6d3e\u751f\u30af\u30e9\u30b9\u306f\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u7279\u6b8a\u5316\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\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=\"\">\/\/ \u57fa\u5e95\u30af\u30e9\u30b9\uff1a\u52d5\u7269\u306e\u57fa\u672c\u7684\u306a\u7279\u6027\u3092\u5b9a\u7fa9\nclass Animal {\nprotected:\n    std::string name;\n    int age;\n\npublic:\n    Animal(const std::string&amp; n, int a) : name(n), age(a) {}\n\n    virtual void makeSound() {\n        std::cout &lt;&lt; \"Some sound\" &lt;&lt; std::endl;\n    }\n};\n\n\/\/ \u6d3e\u751f\u30af\u30e9\u30b9\uff1a\u72ac\u306e\u7279\u6b8a\u306a\u7279\u6027\u3092\u8ffd\u52a0\nclass Dog : public Animal {\nprivate:\n    std::string breed;\n\npublic:\n    Dog(const std::string&amp; n, int a, const std::string&amp; b)\n        : Animal(n, a), breed(b) {}\n\n    void makeSound() override {\n        std::cout &lt;&lt; \"Woof!\" &lt;&lt; std::endl;\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u306e\u95a2\u4fc2\u6027\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u70b9\u306f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6d3e\u751f\u30af\u30e9\u30b9\u306f\u57fa\u5e95\u30af\u30e9\u30b9\u306epublic\u304a\u3088\u3073protected\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/li>\n\n\n\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u62e1\u5f35\u307e\u305f\u306f\u7279\u5316\u53ef\u80fd<\/li>\n\n\n\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u3078\u306e\u53c2\u7167\u3084\u30dd\u30a4\u30f3\u30bf\u3092\u901a\u3058\u3066\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6271\u3048\u308b\uff08\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u7d99\u627f\u306b\u3088\u308b\u62e1\u5f35\u306e\u4ed5\u7d44\u307f<\/h3>\n\n\n\n<p>\u7d99\u627f\u306b\u3088\u308b\u62e1\u5f35\u306f\u3001\u4ee5\u4e0b\u306e3\u3064\u306e\u65b9\u6cd5\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6a5f\u80fd\u306e\u8ffd\u52a0<\/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 Bird : public Animal {\n   private:\n       float wingSpan;\n\n   public:\n       Bird(const std::string&amp; n, int a, float w)\n           : Animal(n, a), wingSpan(w) {}\n\n       \/\/ \u65b0\u3057\u3044\u6a5f\u80fd\u306e\u8ffd\u52a0\n       void fly() {\n           std::cout &lt;&lt; \"Flying with wingspan \" &lt;&lt; wingSpan &lt;&lt; \"m\" &lt;&lt; std::endl;\n       }\n   };<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u6a5f\u80fd\u306e\u4e0a\u66f8\u304d\uff08\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\uff09<\/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 Cat : public Animal {\n   public:\n       Cat(const std::string&amp; n, int a) : Animal(n, a) {}\n\n       \/\/ \u65e2\u5b58\u306e\u6a5f\u80fd\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\n       void makeSound() override {\n           std::cout &lt;&lt; \"Meow!\" &lt;&lt; std::endl;\n       }\n   };<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u6a5f\u80fd\u306e\u62e1\u5f35\uff08\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u6a5f\u80fd\u3092\u6d3b\u7528\uff09<\/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 SuperDog : public Dog {\n   public:\n       SuperDog(const std::string&amp; n, int a, const std::string&amp; b)\n           : Dog(n, a, b) {}\n\n       \/\/ \u57fa\u5e95\u30af\u30e9\u30b9\u306e\u6a5f\u80fd\u3092\u62e1\u5f35\n       void makeSound() override {\n           Dog::makeSound();  \/\/ \u57fa\u5e95\u30af\u30e9\u30b9\u306e\u6a5f\u80fd\u3092\u547c\u3073\u51fa\u3057\n           std::cout &lt;&lt; \"...but louder!\" &lt;&lt; std::endl;\n       }\n   };<\/pre>\n\n\n\n<p>\u3053\u306e\u62e1\u5f35\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308a\u3001\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u306a\u304f\u65b0\u3057\u3044\u6a5f\u80fd\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u958b\u653e\u9589\u9396\u306e\u539f\u5247\uff08Open-Closed Principle\uff09\u300d\u3092\u5b9f\u73fe\u3059\u308b\u91cd\u8981\u306a\u624b\u6bb5\u3068\u306a\u308a\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u8a2d\u8a08\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7d99\u627f\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7d99\u627f\u306f\u300cis-a\u95a2\u4fc2\u300d\u304c\u6210\u308a\u7acb\u3064\u5834\u5408\u306b\u306e\u307f\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u904e\u5ea6\u306a\u7d99\u627f\u306f\u907f\u3051\u3001\u5fc5\u8981\u306a\u5834\u5408\u306f\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u691c\u8a0e\u3059\u308b<\/li>\n\n\n\n<li>virtual\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5b9a\u7fa9\u3092\u5fd8\u308c\u305a\u306b\u884c\u3046<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u790e\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u679c\u7684\u306a\u30af\u30e9\u30b9\u8a2d\u8a08\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001C++\u306b\u304a\u3051\u308b\u7d99\u627f\u306e\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\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-4\">C++\u306b\u304a\u3051\u308b\u7d99\u627f\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u57fa\u672c\u7684\u306a\u7d99\u627f\u306e\u66f8\u304d\u65b9\u3068\u30b7\u30f3\u30bf\u30c3\u30af\u30b9<\/h3>\n\n\n\n<p>C++\u3067\u306e\u7d99\u627f\u306f\u3001\u30af\u30e9\u30b9\u5b9a\u7fa9\u6642\u306b\u30b3\u30ed\u30f3\uff08:\uff09\u3092\u4f7f\u7528\u3057\u3066\u6307\u5b9a\u3057\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class \u6d3e\u751f\u30af\u30e9\u30b9\u540d : \u30a2\u30af\u30bb\u30b9\u6307\u5b9a\u5b50 \u57fa\u5e95\u30af\u30e9\u30b9\u540d {\n    \/\/ \u30af\u30e9\u30b9\u306e\u5b9f\u88c5\n};<\/pre>\n\n\n\n<p>\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u5e95\u30af\u30e9\u30b9\uff1a\u56f3\u5f62\u306e\u57fa\u672c\u30af\u30e9\u30b9\nclass Shape {\nprotected:\n    double x, y;  \/\/ \u4e2d\u5fc3\u5ea7\u6a19\n\npublic:\n    Shape(double x0 = 0, double y0 = 0) : x(x0), y(y0) {}\n\n    \/\/ \u7d14\u7c8b\u4eee\u60f3\u95a2\u6570\uff1a\u9762\u7a4d\u8a08\u7b97\n    virtual double getArea() const = 0;\n\n    \/\/ \u4eee\u60f3\u95a2\u6570\uff1a\u56f3\u5f62\u306e\u60c5\u5831\u8868\u793a\n    virtual void printInfo() const {\n        std::cout &lt;&lt; \"Position: (\" &lt;&lt; x &lt;&lt; \", \" &lt;&lt; y &lt;&lt; \")\" &lt;&lt; std::endl;\n    }\n\n    \/\/ \u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\n    virtual ~Shape() {}\n};\n\n\/\/ \u6d3e\u751f\u30af\u30e9\u30b9\uff1a\u5186\u3092\u8868\u3059\u30af\u30e9\u30b9\nclass Circle : public Shape {\nprivate:\n    double radius;\n\npublic:\n    Circle(double x0, double y0, double r) \n        : Shape(x0, y0), radius(r) {}\n\n    \/\/ \u7d14\u7c8b\u4eee\u60f3\u95a2\u6570\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\n    double getArea() const override {\n        return M_PI * radius * radius;\n    }\n\n    \/\/ \u4eee\u60f3\u95a2\u6570\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\n    void printInfo() const override {\n        Shape::printInfo();  \/\/ \u57fa\u5e95\u30af\u30e9\u30b9\u306e\u51e6\u7406\u3092\u547c\u3073\u51fa\u3057\n        std::cout &lt;&lt; \"Radius: \" &lt;&lt; radius &lt;&lt; std::endl;\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30a2\u30af\u30bb\u30b9\u6307\u5b9a\u5b50\u306e\u4fbf\u5229\uff08public\u3001protected\u3001private\uff09<\/h3>\n\n\n\n<p>C++\u3067\u306f3\u7a2e\u985e\u306e\u30a2\u30af\u30bb\u30b9\u6307\u5b9a\u5b50\u3092\u4f7f\u7528\u3057\u3066\u7d99\u627f\u306e\u53ef\u8996\u6027\u3092\u5236\u5fa1\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>public\u7d99\u627f<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6700\u3082\u4e00\u822c\u7684\u306a\u7d99\u627f\u5f62\u5f0f<\/li>\n\n\n\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u306epublic\u30e1\u30f3\u30d0\u30fc\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u3082public<\/li>\n\n\n\n<li>protected\u30e1\u30f3\u30d0\u30fc\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u3082protected<\/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=\"\">   class Rectangle : public Shape {\n   private:\n       double width, height;\n\n   public:\n       Rectangle(double x0, double y0, double w, double h)\n           : Shape(x0, y0), width(w), height(h) {}\n\n       double getArea() const override {\n           return width * height;\n       }\n   };<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>protected\u7d99\u627f<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u306epublic\u30e1\u30f3\u30d0\u30fc\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u3067protected<\/li>\n\n\n\n<li>\u6d3e\u751f\u30af\u30e9\u30b9\u3092\u901a\u3058\u3066\u6a5f\u80fd\u3092\u5236\u9650\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u7528<\/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=\"\">   class InternalShape : protected Shape {\n   public:\n       \/\/ \u57fa\u5e95\u30af\u30e9\u30b9\u306epublic\u30e1\u30f3\u30d0\u30fc\u306f\u3053\u3053\u3067\u306fprotected\n       using Shape::Shape;  \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u4f7f\u7528\u53ef\u80fd\n\n       \/\/ \u5fc5\u8981\u306a\u6a5f\u80fd\u306e\u307f\u3092\u516c\u958b\n       void moveToOrigin() {\n           x = 0;  \/\/ protected\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n           y = 0;\n       }\n   };<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>private\u7d99\u627f<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u306epublic\/protected\u30e1\u30f3\u30d0\u30fc\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u3067private<\/li>\n\n\n\n<li>\u5b9f\u88c5\u306e\u8a73\u7d30\u3092\u5b8c\u5168\u306b\u96a0\u853d\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u7528<\/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=\"\">   class EncapsulatedCircle : private Circle {\n   public:\n       EncapsulatedCircle(double r) \n           : Circle(0, 0, r) {}\n\n       \/\/ \u5fc5\u8981\u306a\u6a5f\u80fd\u306e\u307f\u3092\u9078\u629e\u7684\u306b\u516c\u958b\n       double calculateArea() {\n           return getArea();  \/\/ private\u3068\u306a\u3063\u305f\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u30a2\u30af\u30bb\u30b9\n       }\n   };<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u52d5\u4f5c<\/h3>\n\n\n\n<p>\u7d99\u627f\u6642\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u30fb\u7834\u68c4\u306e\u9806\u5e8f\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u547c\u3073\u51fa\u3057\u9806\u5e8f<\/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 Base {\n   public:\n       Base() { std::cout &lt;&lt; \"Base constructor\" &lt;&lt; std::endl; }\n       virtual ~Base() { std::cout &lt;&lt; \"Base destructor\" &lt;&lt; std::endl; }\n   };\n\n   class Derived : public Base {\n   private:\n       std::string* data;\n\n   public:\n       Derived() : Base() {  \/\/ \u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u5148\u306b\u547c\u3070\u308c\u308b\n           std::cout &lt;&lt; \"Derived constructor\" &lt;&lt; std::endl;\n           data = new std::string(\"Resource\");\n       }\n\n       ~Derived() {  \/\/ \u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u5148\u306b\u547c\u3070\u308c\u308b\n           std::cout &lt;&lt; \"Derived destructor\" &lt;&lt; std::endl;\n           delete data;\n       }\n   };<\/pre>\n\n\n\n<p>\u5b9f\u884c\u6642\u306e\u51fa\u529b\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=\"\">Base constructor\nDerived constructor\nDerived destructor\nBase destructor<\/pre>\n\n\n\n<p>\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30f3\u30d0\u521d\u671f\u5316\u30ea\u30b9\u30c8\u306e\u6d3b\u7528<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001\u30e1\u30f3\u30d0\u521d\u671f\u5316\u30ea\u30b9\u30c8\u3067\u547c\u3073\u51fa\u3059<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u89b3\u70b9\u3067\u63a8\u5968\u3055\u308c\u308b\u65b9\u6cd5<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5fc5\u8981\u6027<\/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=\"\">   Base* ptr = new Derived();\n   delete ptr;  \/\/ \u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u306a\u3044\u3068\u672a\u5b9a\u7fa9\u52d5\u4f5c<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u5b89\u5168\u6027\u3078\u306e\u914d\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=\"\">   class SafeDerived : public Base {\n   private:\n       std::unique_ptr&lt;std::string&gt; data;  \/\/ \u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528\n\n   public:\n       SafeDerived() : Base(), data(std::make_unique&lt;std::string&gt;(\"Resource\")) {\n           \/\/ \u4f8b\u5916\u304c\u767a\u751f\u3057\u3066\u3082\u3001\u30ea\u30bd\u30fc\u30b9\u306f\u9069\u5207\u306b\u89e3\u653e\u3055\u308c\u308b\n       }\n   };<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u65b9\u6cd5\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u30d0\u30b0\u306e\u5c11\u306a\u3044\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u5b9f\u88c5\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u7d99\u627f\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">\u5b9f\u8df5\u7d99\u627f\u30d1\u30bf\u30fc\u30f3\u3068\u4f7f\u7528\u30b7\u30fc\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u5358\u4e00\u7d99\u627fvs\u591a\u91cd\u7d99\u627f\u306e\u9078\u629e\u57fa\u6e96<\/h3>\n\n\n\n<p>C++\u306f\u5358\u4e00\u7d99\u627f\u3068\u591a\u91cd\u7d99\u627f\u306e\u4e21\u65b9\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-10\">\u5358\u4e00\u7d99\u627f\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u4f7f\u7528\u30b7\u30fc\u30f3<\/h4>\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=\"\">\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u57fa\u5e95\u30af\u30e9\u30b9\nclass DatabaseConnection {\nprotected:\n    std::string connectionString;\n    bool isConnected;\n\npublic:\n    DatabaseConnection(const std::string&amp; conn) \n        : connectionString(conn), isConnected(false) {}\n\n    virtual bool connect() = 0;\n    virtual void disconnect() = 0;\n    virtual ~DatabaseConnection() = default;\n};\n\n\/\/ MySQL\u7528\u306e\u5177\u8c61\u30af\u30e9\u30b9\nclass MySQLConnection : public DatabaseConnection {\nprivate:\n    std::unique_ptr&lt;MySQL_Handler&gt; handler;  \/\/ MySQL\u30cf\u30f3\u30c9\u30e9\n\npublic:\n    MySQLConnection(const std::string&amp; conn) \n        : DatabaseConnection(conn) {}\n\n    bool connect() override {\n        \/\/ MySQL\u56fa\u6709\u306e\u63a5\u7d9a\u51e6\u7406\n        return true;\n    }\n\n    void disconnect() override {\n        \/\/ MySQL\u56fa\u6709\u306e\u5207\u65ad\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<p>\u5358\u4e00\u7d99\u627f\u306e\u63a8\u5968\u30b7\u30fc\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u660e\u78ba\u306a\u300cis-a\u95a2\u4fc2\u300d\u304c\u5b58\u5728\u3059\u308b\u5834\u5408<\/li>\n\n\n\n<li>\u6a5f\u80fd\u306e\u968e\u5c64\u69cb\u9020\u304c\u5358\u7d14\u306a\u5834\u5408<\/li>\n\n\n\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u304c\u4e3b\u76ee\u7684\u306e\u5834\u5408<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3092\u91cd\u8996\u3059\u308b\u5834\u5408<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-11\">\u591a\u91cd\u7d99\u627f\u306e\u4f7f\u7528\u5224\u65ad\u57fa\u6e96<\/h4>\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\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b91\uff1a\u30ed\u30b0\u6a5f\u80fd\nclass ILoggable {\npublic:\n    virtual void log(const std::string&amp; message) = 0;\n    virtual ~ILoggable() = default;\n};\n\n\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b92\uff1a\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u6a5f\u80fd\nclass ISerializable {\npublic:\n    virtual std::string serialize() const = 0;\n    virtual void deserialize(const std::string&amp; data) = 0;\n    virtual ~ISerializable() = default;\n};\n\n\/\/ \u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u30af\u30e9\u30b9\nclass Configuration : public ILoggable, public ISerializable {\nprivate:\n    std::map&lt;std::string, std::string&gt; settings;\n\npublic:\n    void log(const std::string&amp; message) override {\n        std::cout &lt;&lt; \"Config Log: \" &lt;&lt; message &lt;&lt; std::endl;\n    }\n\n    std::string serialize() const override {\n        \/\/ \u8a2d\u5b9a\u3092JSON\u5f62\u5f0f\u306b\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\n        return \"{}\";  \/\/ \u5b9f\u88c5\u7701\u7565\n    }\n\n    void deserialize(const std::string&amp; data) override {\n        \/\/ JSON\u5f62\u5f0f\u304b\u3089\u8a2d\u5b9a\u3092\u5fa9\u5143\n    }\n};<\/pre>\n\n\n\n<p>\u591a\u91cd\u7d99\u627f\u306e\u9069\u5207\u306a\u4f7f\u7528\u30b7\u30fc\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u5834\u5408<\/li>\n\n\n\n<li>\u7570\u306a\u308b\u6a5f\u80fd\u7fa4\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408<\/li>\n\n\n\n<li>Mixin\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u5834\u5408<\/li>\n\n\n\n<li>\u30d7\u30e9\u30b0\u30a4\u30f3\u6a5f\u80fd\u3092\u5b9f\u73fe\u3059\u308b\u5834\u5408<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u3057\u3066\u306e\u7d14\u7c8b\u4eee\u60f3\u95a2\u6570\u6d3b\u7528\u6cd5<\/h3>\n\n\n\n<p>\u7d14\u7c8b\u4eee\u60f3\u95a2\u6570\u3092\u4f7f\u7528\u3057\u305f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u8a2d\u8a08\u306f\u3001\u67d4\u8edf\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u624b\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=\"\">\/\/ \u30c7\u30d0\u30a4\u30b9\u30c9\u30e9\u30a4\u30d0\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\nclass IDeviceDriver {\npublic:\n    virtual bool initialize() = 0;\n    virtual bool read(void* buffer, size_t size) = 0;\n    virtual bool write(const void* data, size_t size) = 0;\n    virtual void shutdown() = 0;\n    virtual ~IDeviceDriver() = default;\n};\n\n\/\/ USB\u30c7\u30d0\u30a4\u30b9\u30c9\u30e9\u30a4\u30d0\u306e\u5b9f\u88c5\nclass USBDriver : public IDeviceDriver {\nprivate:\n    uint16_t vendorId;\n    uint16_t productId;\n\npublic:\n    USBDriver(uint16_t vid, uint16_t pid) \n        : vendorId(vid), productId(pid) {}\n\n    bool initialize() override {\n        \/\/ USB\u30c7\u30d0\u30a4\u30b9\u306e\u521d\u671f\u5316\u51e6\u7406\n        return true;\n    }\n\n    bool read(void* buffer, size_t size) override {\n        \/\/ USB\u30c7\u30d0\u30a4\u30b9\u304b\u3089\u306e\u30c7\u30fc\u30bf\u8aad\u307f\u53d6\u308a\n        return true;\n    }\n\n    bool write(const void* data, size_t size) override {\n        \/\/ USB\u30c7\u30d0\u30a4\u30b9\u3078\u306e\u30c7\u30fc\u30bf\u66f8\u304d\u8fbc\u307f\n        return true;\n    }\n\n    void shutdown() override {\n        \/\/ USB\u30c7\u30d0\u30a4\u30b9\u306e\u7d42\u4e86\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u7d99\u627f\u3092\u6d3b\u7528\u3057\u305f\u52b9\u679c\u7684\u306a\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u30b9\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u4f8b\nclass IRenderer {\npublic:\n    virtual void prepare() = 0;\n    virtual void render(const Scene&amp; scene) = 0;\n    virtual void cleanup() = 0;\n    virtual ~IRenderer() = default;\n};\n\nclass OpenGLRenderer : public IRenderer {\nprivate:\n    GLContext context;\n\npublic:\n    void prepare() override {\n        \/\/ OpenGL\u56fa\u6709\u306e\u521d\u671f\u5316\n    }\n\n    void render(const Scene&amp; scene) override {\n        \/\/ OpenGL\u3092\u4f7f\u7528\u3057\u305f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\n    }\n\n    void cleanup() override {\n        \/\/ OpenGL\u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\n    }\n};\n\nclass VulkanRenderer : public IRenderer {\nprivate:\n    VkInstance instance;\n\npublic:\n    void prepare() override {\n        \/\/ Vulkan\u56fa\u6709\u306e\u521d\u671f\u5316\n    }\n\n    void render(const Scene&amp; scene) override {\n        \/\/ Vulkan\u3092\u4f7f\u7528\u3057\u305f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\n    }\n\n    void cleanup() override {\n        \/\/ Vulkan\u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\n    }\n};\n\n\/\/ \u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u5229\u7528\u4f8b\nclass RenderingEngine {\nprivate:\n    std::unique_ptr&lt;IRenderer&gt; renderer;\n\npublic:\n    void setRenderer(std::unique_ptr&lt;IRenderer&gt; r) {\n        renderer = std::move(r);\n    }\n\n    void renderScene(const Scene&amp; scene) {\n        if (renderer) {\n            renderer-&gt;prepare();\n            renderer-&gt;render(scene);\n            renderer-&gt;cleanup();\n        }\n    }\n};<\/pre>\n\n\n\n<p>\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u6700\u5c0f\u9650\u306e\u6a5f\u80fd\u306b\u9650\u5b9a<\/li>\n\n\n\n<li>\u4f9d\u5b58\u6027\u6ce8\u5165\u3092\u6d3b\u7528\u3057\u3066\u7d50\u5408\u5ea6\u3092\u4f4e\u6e1b<\/li>\n\n\n\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3092\u4f7f\u7528\u3057\u3066\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3092\u81ea\u52d5\u5316<\/li>\n\n\n\n<li>\u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u9069\u5207\u306b\u5b9a\u7fa9<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u62e1\u5f35\u6027\u306e\u3042\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u7d99\u627f\u8a2d\u8a08\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-14\">\u7d99\u627f\u8a2d\u8a08\u3067\u3088\u304f\u3042\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u89e3\u6c7a\u7b56<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u83f1\u5f62\u7d99\u627f\u554f\u984c\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u83f1\u5f62\u7d99\u627f\uff08\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u7d99\u627f\uff09\u306f\u3001\u8907\u6570\u306e\u7d99\u627f\u30d1\u30b9\u304c\u540c\u4e00\u306e\u57fa\u5e95\u30af\u30e9\u30b9\u306b\u5230\u9054\u3059\u308b\u72b6\u6cc1\u3067\u767a\u751f\u3059\u308b\u554f\u984c\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=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u83f1\u5f62\u7d99\u627f\u306e\u4f8b\nclass Device {\nprotected:\n    std::string deviceId;\n\npublic:\n    Device(const std::string&amp; id) : deviceId(id) {}\n    virtual void initialize() { std::cout &lt;&lt; \"Device init\" &lt;&lt; std::endl; }\n};\n\nclass USBDevice : public Device {\npublic:\n    USBDevice(const std::string&amp; id) : Device(id) {}\n    void initialize() override { std::cout &lt;&lt; \"USB init\" &lt;&lt; std::endl; }\n};\n\nclass NetworkDevice : public Device {\npublic:\n    NetworkDevice(const std::string&amp; id) : Device(id) {}\n    void initialize() override { std::cout &lt;&lt; \"Network init\" &lt;&lt; std::endl; }\n};\n\n\/\/ \u554f\u984c: Device\u304cUSBDevice\u3068NetworkDevice\u306e\u4e21\u65b9\u304b\u3089\u7d99\u627f\u3055\u308c\u308b\nclass WebCamera : public USBDevice, public NetworkDevice {\npublic:\n    \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc: deviceId\u304c\u66d6\u6627\u306b\u306a\u308b\n    WebCamera(const std::string&amp; id) \n        : USBDevice(id), NetworkDevice(id) {}\n};<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-16\">\u89e3\u6c7a\u7b561: \u4eee\u60f3\u7d99\u627f\u306e\u4f7f\u7528<\/h4>\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=\"\">\/\/ \u4eee\u60f3\u7d99\u627f\u3092\u4f7f\u7528\u3057\u305f\u89e3\u6c7a\u4f8b\nclass Device {\nprotected:\n    std::string deviceId;\n\npublic:\n    Device(const std::string&amp; id) : deviceId(id) {}\n    virtual void initialize() { std::cout &lt;&lt; \"Device init\" &lt;&lt; std::endl; }\n};\n\nclass USBDevice : virtual public Device {\npublic:\n    USBDevice(const std::string&amp; id) : Device(id) {}\n    void initialize() override { std::cout &lt;&lt; \"USB init\" &lt;&lt; std::endl; }\n};\n\nclass NetworkDevice : virtual public Device {\npublic:\n    NetworkDevice(const std::string&amp; id) : Device(id) {}\n    void initialize() override { std::cout &lt;&lt; \"Network init\" &lt;&lt; std::endl; }\n};\n\nclass WebCamera : public USBDevice, public NetworkDevice {\npublic:\n    \/\/ \u6b63\u3057\u304f\u52d5\u4f5c: Device\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f1\u3064\u3060\u3051\n    WebCamera(const std::string&amp; id) \n        : Device(id), USBDevice(id), NetworkDevice(id) {}\n\n    void initialize() override {\n        USBDevice::initialize();\n        NetworkDevice::initialize();\n    }\n};<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">\u89e3\u6c7a\u7b562: \u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u306e\u4f7f\u7528<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u305f\u4ee3\u66ff\u8a2d\u8a08\nclass WebCamera {\nprivate:\n    std::unique_ptr&lt;USBDevice&gt; usbInterface;\n    std::unique_ptr&lt;NetworkDevice&gt; networkInterface;\n    std::string deviceId;\n\npublic:\n    WebCamera(const std::string&amp; id)\n        : deviceId(id)\n        , usbInterface(std::make_unique&lt;USBDevice&gt;(id))\n        , networkInterface(std::make_unique&lt;NetworkDevice&gt;(id)) {}\n\n    void initialize() {\n        usbInterface-&gt;initialize();\n        networkInterface-&gt;initialize();\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u5bfe\u7b56\u3068\u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u91cd\u8981\u6027<\/h3>\n\n\n\n<p>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306f\u7d99\u627f\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u767a\u751f\u3059\u308b\u554f\u984c\u306e\u4e00\u3064\u3067\u3059\u3002\u7279\u306b\u3001\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30dd\u30a4\u30f3\u30bf\u3092\u901a\u3058\u3066\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u306b\u6ce8\u610f\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=\"\">\/\/ \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u4f8b\nclass ResourceManager {\nprotected:\n    void* resource;\n\npublic:\n    ResourceManager() : resource(nullptr) {}\n    ~ResourceManager() {  \/\/ \u975e\u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\n        cleanup();\n    }\n\n    virtual void cleanup() {\n        free(resource);\n        resource = nullptr;\n    }\n};\n\nclass FileManager : public ResourceManager {\nprivate:\n    FILE* file;\n\npublic:\n    FileManager() : file(nullptr) {}\n    ~FileManager() {  \/\/ \u57fa\u5e95\u30af\u30e9\u30b9\u7d4c\u7531\u3067\u547c\u3070\u308c\u306a\u3044\u53ef\u80fd\u6027\n        if (file) fclose(file);\n    }\n\n    void cleanup() override {\n        if (file) {\n            fclose(file);\n            file = nullptr;\n        }\n        ResourceManager::cleanup();\n    }\n};<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-19\">\u89e3\u6c7a\u7b56: \u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3068 RAII \u306e\u4f7f\u7528<\/h4>\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=\"\">\/\/ \u9069\u5207\u306a\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u4f8b\nclass ResourceManager {\nprotected:\n    std::unique_ptr&lt;void, void(*)(void*)&gt; resource;\n\npublic:\n    ResourceManager() : resource(nullptr, free) {}\n    virtual ~ResourceManager() = default;  \/\/ \u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\n\n    virtual void cleanup() {\n        resource.reset();\n    }\n};\n\nclass FileManager : public ResourceManager {\nprivate:\n    std::unique_ptr&lt;FILE, int(*)(FILE*)&gt; file;\n\npublic:\n    FileManager() : file(nullptr, fclose) {}\n\n    void cleanup() override {\n        file.reset();\n        ResourceManager::cleanup();\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30b9\u30e9\u30a4\u30b7\u30f3\u30b0\u554f\u984c\u306e\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30b9\u30e9\u30a4\u30b7\u30f3\u30b0\u306f\u3001\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u30b3\u30d4\u30fc\u3059\u308b\u969b\u306b\u3001\u6d3e\u751f\u30af\u30e9\u30b9\u56fa\u6709\u306e\u30e1\u30f3\u30d0\u30fc\u304c\u5931\u308f\u308c\u308b\u554f\u984c\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=\"\">\/\/ \u30b9\u30e9\u30a4\u30b7\u30f3\u30b0\u306e\u4f8b\nclass Shape {\nprotected:\n    double x, y;\n\npublic:\n    Shape(double x0, double y0) : x(x0), y(y0) {}\n    virtual double getArea() const { return 0.0; }\n};\n\nclass Circle : public Shape {\nprivate:\n    double radius;\n\npublic:\n    Circle(double x0, double y0, double r) \n        : Shape(x0, y0), radius(r) {}\n\n    double getArea() const override {\n        return M_PI * radius * radius;\n    }\n};\n\n\/\/ \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\nvoid processShape(Shape shape) {  \/\/ \u5024\u6e21\u3057\n    std::cout &lt;&lt; \"Area: \" &lt;&lt; shape.getArea() &lt;&lt; std::endl;\n}\n\nCircle circle(0, 0, 5);\nprocessShape(circle);  \/\/ circle\u306e\u534a\u5f84\u60c5\u5831\u304c\u5931\u308f\u308c\u308b<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-21\">\u89e3\u6c7a\u7b56: \u30dd\u30a4\u30f3\u30bf\u307e\u305f\u306f\u53c2\u7167\u306e\u4f7f\u7528<\/h4>\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=\"\">\/\/ \u30b9\u30e9\u30a4\u30b7\u30f3\u30b0\u9632\u6b62\u306e\u4f8b\nclass Shape {\npublic:\n    virtual std::unique_ptr&lt;Shape&gt; clone() const = 0;\n    virtual ~Shape() = default;\n};\n\nclass Circle : public Shape {\npublic:\n    std::unique_ptr&lt;Shape&gt; clone() const override {\n        return std::make_unique&lt;Circle&gt;(*this);\n    }\n};\n\n\/\/ \u6b63\u3057\u3044\u5b9f\u88c5\nvoid processShape(const Shape&amp; shape) {  \/\/ \u53c2\u7167\u3067\u53d7\u3051\u53d6\u308b\n    std::cout &lt;&lt; \"Area: \" &lt;&lt; shape.getArea() &lt;&lt; std::endl;\n}\n\n\/\/ \u307e\u305f\u306f\nvoid processShapePtr(std::unique_ptr&lt;Shape&gt; shape) {  \/\/ \u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3067\u53d7\u3051\u53d6\u308b\n    std::cout &lt;&lt; \"Area: \" &lt;&lt; shape-&gt;getArea() &lt;&lt; std::endl;\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u554f\u984c\u306b\u5bfe\u3059\u308b\u4e3b\u306a\u5bfe\u7b56\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4eee\u60f3\u7d99\u627f\u306e\u9069\u5207\u306a\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u83f1\u5f62\u7d99\u627f\u3092\u907f\u3051\u3089\u308c\u306a\u3044\u5834\u5408\u306e\u307f\u4f7f\u7528<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3092\u8003\u616e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u57fa\u672c\u539f\u5247<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>RAII\u539f\u5247\u306e\u9075\u5b88<\/li>\n\n\n\n<li>\u4eee\u60f3\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u9069\u5207\u306a\u5b9a\u7fa9<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30b9\u30e9\u30a4\u30b7\u30f3\u30b0\u9632\u6b62<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53c2\u7167\u307e\u305f\u306f\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u30af\u30ed\u30fc\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u5024\u6e21\u3057\u306e\u614e\u91cd\u306a\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u672a\u7136\u306b\u9632\u3050\u305f\u3081\u306e\u8a2d\u8a08\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-22\">\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u7d99\u627f\u8a2d\u8a08\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">LSP\u306b\u57fa\u3065\u304f\u7d99\u627f\u306e\u8a2d\u8a08\u624b\u6cd5<\/h3>\n\n\n\n<p>\u30ea\u30b9\u30b3\u30d5\u306e\u7f6e\u63db\u539f\u5247\uff08LSP: Liskov Substitution Principle\uff09\u306f\u3001\u7d99\u627f\u8a2d\u8a08\u306e\u57fa\u672c\u539f\u5247\u3068\u3057\u3066\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u539f\u5247\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u3068\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ LSP\u306b\u9055\u53cd\u3059\u308b\u4f8b\nclass Bird {\npublic:\n    virtual void fly() {\n        std::cout &lt;&lt; \"Flying high!\" &lt;&lt; std::endl;\n    }\n};\n\nclass Penguin : public Bird {  \/\/ \u554f\u984c: \u30da\u30f3\u30ae\u30f3\u306f\u98db\u3079\u306a\u3044\npublic:\n    void fly() override {\n        throw std::runtime_error(\"Penguins can't fly!\");  \/\/ LSP\u9055\u53cd\n    }\n};\n\n\/\/ LSP\u306b\u6e96\u62e0\u3057\u305f\u8a2d\u8a08\nclass Bird {\npublic:\n    virtual void move() = 0;  \/\/ \u4e00\u822c\u7684\u306a\u79fb\u52d5\u65b9\u6cd5\n    virtual ~Bird() = default;\n};\n\nclass FlyingBird : public Bird {\npublic:\n    void move() override {\n        fly();\n    }\n\nprotected:\n    virtual void fly() {\n        std::cout &lt;&lt; \"Flying high!\" &lt;&lt; std::endl;\n    }\n};\n\nclass WalkingBird : public Bird {\npublic:\n    void move() override {\n        walk();\n    }\n\nprotected:\n    virtual void walk() {\n        std::cout &lt;&lt; \"Walking steadily!\" &lt;&lt; std::endl;\n    }\n};\n\nclass Sparrow : public FlyingBird {\n    \/\/ \u98db\u884c\u53ef\u80fd\u306a\u9ce5\u306e\u5b9f\u88c5\n};\n\nclass Penguin : public WalkingBird {\n    \/\/ \u6b69\u884c\u3059\u308b\u9ce5\u306e\u5b9f\u88c5\n};<\/pre>\n\n\n\n<p>LSP\u9075\u5b88\u306e\u305f\u3081\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u5951\u7d04\u3092\u5fc5\u305a\u5b88\u308b<\/li>\n\n\n\n<li>\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u4f8b\u5916\u3092\u8ffd\u52a0\u3057\u306a\u3044<\/li>\n\n\n\n<li>\u4e8b\u524d\u6761\u4ef6\u3092\u5f37\u5316\u3057\u306a\u3044<\/li>\n\n\n\n<li>\u4e8b\u5f8c\u6761\u4ef6\u3092\u5f31\u3081\u306a\u3044<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">\u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u69cb\u9020<\/h3>\n\n\n\n<p>\u7d99\u627f\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u30c6\u30b9\u30c8\u306e\u3057\u3084\u3059\u3055\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\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=\"\">\/\/ \u30c6\u30b9\u30bf\u30d3\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\u4f8b\nclass IDatabase {\npublic:\n    virtual bool connect() = 0;\n    virtual bool execute(const std::string&amp; query) = 0;\n    virtual void disconnect() = 0;\n    virtual ~IDatabase() = default;\n};\n\nclass DatabaseConnection : public IDatabase {\nprivate:\n    std::string connectionString;\n    bool connected;\n\npublic:\n    explicit DatabaseConnection(const std::string&amp; conn) \n        : connectionString(conn), connected(false) {}\n\n    bool connect() override {\n        \/\/ \u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u51e6\u7406\n        connected = true;\n        return connected;\n    }\n\n    bool execute(const std::string&amp; query) override {\n        if (!connected) return false;\n        \/\/ \u30af\u30a8\u30ea\u5b9f\u884c\u51e6\u7406\n        return true;\n    }\n\n    void disconnect() override {\n        if (connected) {\n            \/\/ \u5207\u65ad\u51e6\u7406\n            connected = false;\n        }\n    }\n};\n\n\/\/ \u30e2\u30c3\u30af\u7528\u306e\u30af\u30e9\u30b9\nclass MockDatabase : public IDatabase {\nprivate:\n    bool shouldSucceed;\n    std::vector&lt;std::string&gt; executedQueries;\n\npublic:\n    explicit MockDatabase(bool succeed = true) \n        : shouldSucceed(succeed) {}\n\n    bool connect() override {\n        return shouldSucceed;\n    }\n\n    bool execute(const std::string&amp; query) override {\n        executedQueries.push_back(query);\n        return shouldSucceed;\n    }\n\n    void disconnect() override {}\n\n    \/\/ \u30c6\u30b9\u30c8\u7528\u306e\u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9\n    const std::vector&lt;std::string&gt;&amp; getExecutedQueries() const {\n        return executedQueries;\n    }\n};\n\n\/\/ \u30c6\u30b9\u30c8\u5bb9\u6613\u306a\u51e6\u7406\u30af\u30e9\u30b9\nclass DataProcessor {\nprivate:\n    std::shared_ptr&lt;IDatabase&gt; db;\n\npublic:\n    explicit DataProcessor(std::shared_ptr&lt;IDatabase&gt; database)\n        : db(database) {}\n\n    bool processData(const std::string&amp; data) {\n        if (!db-&gt;connect()) return false;\n        bool result = db-&gt;execute(\"INSERT INTO data VALUES ('\" + data + \"')\");\n        db-&gt;disconnect();\n        return result;\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u5c06\u6765\u306e\u62e1\u5f35\u3092\u898b\u636e\u3048\u305f\u8a2d\u8a08\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>\u5c06\u6765\u306e\u8981\u4ef6\u5909\u66f4\u3084\u6a5f\u80fd\u8ffd\u52a0\u306b\u67d4\u8edf\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u8a2d\u8a08\u3092\u5fc3\u304c\u3051\u308b\u3053\u3068\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=\"\">\/\/ \u62e1\u5f35\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\u4f8b\nclass PaymentProcessor {\npublic:\n    virtual bool processPayment(double amount) = 0;\n    virtual bool refund(double amount) = 0;\n    virtual bool validateTransaction() = 0;\n    virtual ~PaymentProcessor() = default;\n\nprotected:\n    \/\/ \u5c06\u6765\u7684\u306a\u6a5f\u80fd\u8ffd\u52a0\u306e\u305f\u3081\u306e\u30d5\u30c3\u30af\n    virtual void preProcess() {}\n    virtual void postProcess() {}\n};\n\n\/\/ \u57fa\u672c\u7684\u306a\u5b9f\u88c5\nclass CreditCardProcessor : public PaymentProcessor {\nprivate:\n    std::string cardNumber;\n    std::string expiryDate;\n\npublic:\n    CreditCardProcessor(const std::string&amp; card, const std::string&amp; expiry)\n        : cardNumber(card), expiryDate(expiry) {}\n\n    bool processPayment(double amount) override {\n        preProcess();\n        \/\/ \u652f\u6255\u3044\u51e6\u7406\u306e\u5b9f\u88c5\n        postProcess();\n        return true;\n    }\n\n    bool refund(double amount) override {\n        \/\/ \u8fd4\u91d1\u51e6\u7406\u306e\u5b9f\u88c5\n        return true;\n    }\n\n    bool validateTransaction() override {\n        \/\/ \u53d6\u5f15\u306e\u691c\u8a3c\n        return true;\n    }\n};\n\n\/\/ \u62e1\u5f35\u5b9f\u88c5\uff1a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5f37\u5316\u7248\nclass SecureCreditCardProcessor : public CreditCardProcessor {\nprivate:\n    std::string securityToken;\n\nprotected:\n    void preProcess() override {\n        \/\/ \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30a7\u30c3\u30af\u306e\u8ffd\u52a0\n        validateSecurityToken();\n    }\n\n    void postProcess() override {\n        \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\u306e\u8a18\u9332\n        logTransaction();\n    }\n\nprivate:\n    void validateSecurityToken() {\n        \/\/ 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class=\"wp-block-list\">\n<li>\u4f9d\u5b58\u6027\u6ce8\u5165\u3092\u6d3b\u7528<\/li>\n\n\n\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3078\u306e\u4f9d\u5b58\u3092\u512a\u5148<\/li>\n\n\n\n<li>\u5177\u8c61\u30af\u30e9\u30b9\u3078\u306e\u4f9d\u5b58\u3092\u6700\u5c0f\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u62e1\u5f35\u6027\u306e\u78ba\u4fdd<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Protected \u30e1\u30f3\u30d0\u30fc\u306e\u9069\u5207\u306a\u63d0\u4f9b<\/li>\n\n\n\n<li>\u30d5\u30c3\u30af\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u8a2d\u5b9a\u306e\u5916\u90e8\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c6\u30b9\u30c8\u306e\u5bb9\u6613\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e2\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u3092\u8003\u616e<\/li>\n\n\n\n<li>\u4f9d\u5b58\u95a2\u4fc2\u306e\u6ce8\u5165<\/li>\n\n\n\n<li>\u5358\u4f53\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u8a2d\u8a08<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u5c06\u6765\u306e\u5909\u66f4\u306b\u3082\u67d4\u8edf\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u7d99\u627f\u8a2d\u8a08\u3092\u5b9f\u73fe\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; 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