{"id":2048,"date":"2025-03-24T08:48:28","date_gmt":"2025-03-23T23:48:28","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2048"},"modified":"2025-03-24T08:48:52","modified_gmt":"2025-03-23T23:48:52","slug":"c%e3%81%aeprotected%e3%82%92%e5%ae%8c%e5%85%a8%e7%90%86%e8%a7%a3%ef%bc%81%e5%ae%9f%e8%b7%b5%e7%9a%84%e3%81%aa%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%a85%e3%81%a4%e3%81%ae%e8%a8%ad%e8%a8%88%e3%83%91","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2048","title":{"rendered":"C++\u306eprotected\u3092\u5b8c\u5168\u7406\u89e3\uff01\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u30685\u3064\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3"},"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\">protected\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u3068\u306f\u4f55\u304b<\/a>      <\/li>      <li>        <a href=\"#i-2\">protected\u30e1\u30f3\u30d0\u30fc\u306e\u7279\u5fb4\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u3068\u30d1\u30d6\u30ea\u30c3\u30af\u3068\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">\u7d99\u627f\u3068protected\u306e\u6df1\u3044\u95a2\u4fc2<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-6\">protected\u30e1\u30f3\u30d0\u30fc\u7d99\u627f\u306e\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u591a\u91cd\u7d99\u627f\u6642\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">\u5b9f\u8df5\u7684\u306aprotected\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u30de\u30e9\u30bd\u30f3\u5316\u3055\u308c\u305f\u30af\u30e9\u30b9\u8a2d\u8a08\u3067\u306e\u4f7f\u7528\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u958b\u767a\u3067\u306e\u5fdc\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">\u4fdd\u8b77\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u30ab\u30d7\u30bb\u30eb\u5316\u3092\u5d29\u3055\u306a\u3044\u8a2d\u8a08\u306e\u30b3\u30c4<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3078\u306e\u5bfe\u51e6\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-16\">\u73fe\u5834\u3067\u6d3b\u304d\u308bprotected\u6d3b\u7528\u8853<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u624b\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306e\u30a8\u30c7\u30a3\u30bf\u30fc\u306e\u4f8b<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">protected\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u3068\u306f\u4f55\u304b<\/h3>\n\n\n\n<p>C++\u306b\u304a\u3051\u308b\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306f\u3001\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\uff08\u5909\u6570\u3084\u30e1\u30bd\u30c3\u30c9\uff09\u306b\u5bfe\u3059\u308b\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3092\u884c\u3046\u305f\u3081\u306e\u91cd\u8981\u306a\u6a5f\u80fd\u3067\u3059\u3002\u9069\u5207\u306a\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306e\u4f7f\u7528\u306b\u3088\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u91cd\u8981\u306a\u539f\u5247\u3067\u3042\u308b\u300c\u30ab\u30d7\u30bb\u30eb\u5316\u300d\u3092\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e3b\u306a\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306b\u306f\u4ee5\u4e0b\u306e3\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n<div id=\"id-8300fe3d-fe35-423e-9973-f5abb0642e34\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u4fee\u98fe\u5b50<\/th><th>\u30a2\u30af\u30bb\u30b9\u7bc4\u56f2<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>public<\/td><td>\u3069\u3053\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/td><td>\u5916\u90e8\u306b\u516c\u958b\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/td><\/tr><tr><td>private<\/td><td>\u540c\u3058\u30af\u30e9\u30b9\u5185\u304b\u3089\u306e\u307f\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/td><td>\u30af\u30e9\u30b9\u5185\u90e8\u306e\u5b9f\u88c5\u8a73\u7d30<\/td><\/tr><tr><td>protected<\/td><td>\u540c\u3058\u30af\u30e9\u30b9\u3068\u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/td><td>\u7d99\u627f\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u8a73\u7d30<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">protected\u30e1\u30f3\u30d0\u30fc\u306e\u7279\u5fb4\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>protected\u30e1\u30f3\u30d0\u30fc\u306e\u4e3b\u306a\u7279\u5fb4\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Base {\nprotected:\n    int protectedValue;    \/\/ protected\u30e1\u30f3\u30d0\u30fc\u5909\u6570\n    void protectedMethod() {  \/\/ protected\u30e1\u30f3\u30d0\u30fc\u95a2\u6570\n        \/\/ \u5b9f\u88c5\n    }\n\npublic:\n    Base() : protectedValue(0) {}\n};\n\nclass Derived : public Base {\npublic:\n    void useProtectedMembers() {\n        protectedValue = 42;      \/\/ OK: \u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089protected\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n        protectedMethod();        \/\/ OK: \u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089protected\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u53ef\u80fd\n    }\n};\n\nint main() {\n    Base base;\n    \/\/ base.protectedValue = 10;    \/\/ \u30a8\u30e9\u30fc: \u30af\u30e9\u30b9\u5916\u304b\u3089\u306f\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef\n    \/\/ base.protectedMethod();      \/\/ \u30a8\u30e9\u30fc: \u30af\u30e9\u30b9\u5916\u304b\u3089\u306f\u547c\u3073\u51fa\u3057\u4e0d\u53ef\n\n    Derived derived;\n    \/\/ derived.protectedValue = 20; \/\/ \u30a8\u30e9\u30fc: \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u3089\u306f\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef\n    derived.useProtectedMembers();  \/\/ OK: \u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u901a\u3058\u3066\u30a2\u30af\u30bb\u30b9\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u3068\u30d1\u30d6\u30ea\u30c3\u30af\u3068\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>\u5404\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306e\u7279\u5fb4\u3092\u5b9f\u8df5\u7684\u306a\u89b3\u70b9\u304b\u3089\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u53ef\u8996\u6027\u306e\u7bc4\u56f2<\/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 Example {\nprivate:\n    int privateVar;    \/\/ \u30af\u30e9\u30b9\u5185\u90e8\u304b\u3089\u306e\u307f\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\nprotected:\n    int protectedVar;  \/\/ \u30af\u30e9\u30b9\u5185\u90e8\u3068\u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\npublic:\n    int publicVar;     \/\/ \u3069\u3053\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u7d99\u627f\u6642\u306e\u6319\u52d5<\/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 {\nprivate:\n    void privateMethod() {}    \/\/ \u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef\nprotected:\n    void protectedMethod() {}  \/\/ \u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\npublic:\n    void publicMethod() {}     \/\/ \u3069\u3053\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n};\n\nclass Derived : public Base {\n    void example() {\n        \/\/ privateMethod();    \/\/ \u30a8\u30e9\u30fc: private\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef\n        protectedMethod();     \/\/ OK: protected\u30e1\u30bd\u30c3\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n        publicMethod();        \/\/ OK: public\u30e1\u30bd\u30c3\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n    }\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u8a2d\u8a08\u4e0a\u306e\u610f\u56f3<\/strong><\/li>\n<\/ol>\n\n\n\n<p>protected\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5834\u5408\u306b\u7279\u306b\u6709\u7528\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u8a73\u7d30\u3092\u6d3e\u751f\u30af\u30e9\u30b9\u306b\u516c\u958b\u3057\u305f\u3044\u5834\u5408<\/li>\n\n\n\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u306a\u3069\u3001\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u6a5f\u80fd\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u958b\u767a\u6642\u3001\u62e1\u5f35\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u306f\u5178\u578b\u7684\u306a\u4f7f\u7528\u4f8b\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Shape {\nprotected:\n    double x, y;  \/\/ \u5ea7\u6a19\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u306b\u3059\u308b\n\n    virtual void calculateArea() = 0;  \/\/ \u6d3e\u751f\u30af\u30e9\u30b9\u3067\u5b9f\u88c5\u5fc5\u9808\u306e\u30e1\u30bd\u30c3\u30c9\n\npublic:\n    Shape(double x, double y) : x(x), y(y) {}\n    virtual double getArea() final {\n        calculateArea();  \/\/ \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\n        return area;\n    }\n\nprivate:\n    double area;  \/\/ \u9762\u7a4d\u306f\u5185\u90e8\u3067\u306e\u307f\u4f7f\u7528\n};<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001protected\u306f\u300cprivate\u307b\u3069\u53b3\u683c\u3067\u306f\u306a\u3044\u304c\u3001public\u307b\u3069\u30aa\u30fc\u30d7\u30f3\u3067\u3082\u306a\u3044\u300d\u4e2d\u9593\u7684\u306a\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3092\u63d0\u4f9b\u3057\u3001\u7d99\u627f\u3092\u8003\u616e\u3057\u305f\u30af\u30e9\u30b9\u8a2d\u8a08\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">\u7d99\u627f\u3068protected\u306e\u6df1\u3044\u95a2\u4fc2<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3092\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>C++\u306b\u304a\u3051\u308b\u7d99\u627f\u3068protected\u306e\u95a2\u4fc2\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08\u306e\u6838\u5fc3\u90e8\u5206\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u4f8b\u3067\u3001\u305d\u306e\u52d5\u4f5c\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\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=\"\">class Base {\nprotected:\n    void protectedMethod() {\n        std::cout &lt;&lt; \"Protected method called\" &lt;&lt; std::endl;\n    }\n    int protectedValue = 0;\n};\n\n\/\/ public\u7d99\u627f\nclass PublicDerived : public Base {\npublic:\n    void accessProtected() {\n        protectedMethod();     \/\/ OK: protected\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n        protectedValue = 42;   \/\/ OK: protected\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n    }\n};\n\n\/\/ protected\u7d99\u627f\nclass ProtectedDerived : protected Base {\npublic:\n    void accessProtected() {\n        protectedMethod();     \/\/ OK: \u57fa\u5e95\u30af\u30e9\u30b9\u306eprotected\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n    }\n};\n\n\/\/ private\u7d99\u627f\nclass PrivateDerived : private Base {\npublic:\n    void accessProtected() {\n        protectedMethod();     \/\/ OK: \u57fa\u5e95\u30af\u30e9\u30b9\u306eprotected\u30e1\u30f3\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n    }\n};<\/pre>\n\n\n\n<p>\u7d99\u627f\u306e\u7a2e\u985e\u306b\u3088\u308b\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u30a2\u30af\u30bb\u30b9\u6a29\u9650\u306e\u5909\u5316\uff1a<\/p>\n\n\n<div id=\"id-0e7cbdab-de09-49aa-b4cc-366e98f20677\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e1\u30f3\u30d0\u30fc\u306e\u7a2e\u985e<\/th><th>public\u7d99\u627f<\/th><th>protected\u7d99\u627f<\/th><th>private\u7d99\u627f<\/th><\/tr><\/thead><tbody><tr><td>public<\/td><td>public<\/td><td>protected<\/td><td>private<\/td><\/tr><tr><td>protected<\/td><td>protected<\/td><td>protected<\/td><td>private<\/td><\/tr><tr><td>private<\/td><td>\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef<\/td><td>\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef<\/td><td>\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">protected\u30e1\u30f3\u30d0\u30fc\u7d99\u627f\u306e\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<p>protected\u30e1\u30f3\u30d0\u30fc\u3092\u4f7f\u7528\u3057\u305f\u7d99\u627f\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u91cd\u8981\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u6bb5\u968e\u7684\u306a\u516c\u958b<\/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 Database {\nprotected:\n    virtual void connect() = 0;\n    virtual void disconnect() = 0;\n    virtual void executeQuery(const std::string&amp; query) = 0;\n\npublic:\n    void performTransaction(const std::string&amp; query) {\n        connect();\n        try {\n            executeQuery(query);\n        } catch (...) {\n            disconnect();\n            throw;\n        }\n        disconnect();\n    }\n};\n\nclass MySQLDatabase : public Database {\nprotected:\n    void connect() override {\n        \/\/ MySQL\u56fa\u6709\u306e\u63a5\u7d9a\u51e6\u7406\n    }\n    void disconnect() override {\n        \/\/ MySQL\u56fa\u6709\u306e\u5207\u65ad\u51e6\u7406\n    }\n    void executeQuery(const std::string&amp; query) override {\n        \/\/ MySQL\u56fa\u6709\u306e\u30af\u30a8\u30ea\u5b9f\u884c\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u62e1\u5f35\u6027\u3068\u518d\u5229\u7528\u6027\u306e\u5411\u4e0a<\/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 UIComponent {\nprotected:\n    virtual void onCreate() = 0;\n    virtual void onDestroy() = 0;\n\n    void initializeResources() {\n        \/\/ \u5171\u901a\u306e\u30ea\u30bd\u30fc\u30b9\u521d\u671f\u5316\u51e6\u7406\n    }\n\npublic:\n    void render() {\n        onCreate();\n        initializeResources();\n        \/\/ \u63cf\u753b\u51e6\u7406\n        onDestroy();\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u591a\u91cd\u7d99\u627f\u6642\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u591a\u91cd\u7d99\u627f\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u83f1\u5f62\u7d99\u627f\u554f\u984c\u306e\u89e3\u6c7a<\/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 Interface {\nprotected:\n    virtual void commonMethod() = 0;\n};\n\n\/\/ virtual\u7d99\u627f\u3092\u4f7f\u7528\u3057\u3066\u83f1\u5f62\u7d99\u627f\u554f\u984c\u3092\u56de\u907f\nclass A : virtual public Interface {\nprotected:\n    void commonMethod() override {\n        \/\/ A\u306e\u5b9f\u88c5\n    }\n};\n\nclass B : virtual public Interface {\nprotected:\n    void commonMethod() override {\n        \/\/ B\u306e\u5b9f\u88c5\n    }\n};\n\nclass Derived : public A, public B {\nprotected:\n    void commonMethod() override {\n        \/\/ \u6700\u7d42\u7684\u306a\u5b9f\u88c5\n        A::commonMethod();  \/\/ \u660e\u793a\u7684\u306b\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\n        B::commonMethod();\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u540d\u524d\u885d\u7a81\u306e\u56de\u907f<\/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 Module1 {\nprotected:\n    void initialize() { \/* \u521d\u671f\u5316\u51e6\u74061 *\/ }\n};\n\nclass Module2 {\nprotected:\n    void initialize() { \/* \u521d\u671f\u5316\u51e6\u74062 *\/ }\n};\n\nclass CombinedModule : public Module1, public Module2 {\npublic:\n    void init() {\n        Module1::initialize();  \/\/ \u30b9\u30b3\u30fc\u30d7\u89e3\u6c7a\u6f14\u7b97\u5b50\u3067\u660e\u793a\u7684\u306b\u6307\u5b9a\n        Module2::initialize();\n    }\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u306e\u4e00\u8cab\u6027\u7dad\u6301<\/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 Engine {\nprotected:\n    virtual void start() = 0;\n    virtual void stop() = 0;\n};\n\nclass ElectricSystem {\nprotected:\n    virtual void powerOn() = 0;\n    virtual void powerOff() = 0;\n};\n\n\/\/ \u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\nclass ModernCar : public Engine, public ElectricSystem {\nprotected:\n    void start() override {\n        powerOn();  \/\/ \u96fb\u6c17\u7cfb\u7d71\u306e\u8d77\u52d5\n        \/\/ \u30a8\u30f3\u30b8\u30f3\u59cb\u52d5\u51e6\u7406\n    }\n\n    void stop() override {\n        \/\/ \u30a8\u30f3\u30b8\u30f3\u505c\u6b62\u51e6\u7406\n        powerOff(); \/\/ \u96fb\u6c17\u7cfb\u7d71\u306e\u505c\u6b62\n    }\n\n    void powerOn() override {\n        \/\/ \u96fb\u6c17\u7cfb\u7d71\u306e\u8d77\u52d5\u51e6\u7406\n    }\n\n    void powerOff() override {\n        \/\/ \u96fb\u6c17\u7cfb\u7d71\u306e\u505c\u6b62\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u4f8b\u304c\u793a\u3059\u3088\u3046\u306b\u3001protected\u30e1\u30f3\u30d0\u30fc\u3068\u7d99\u627f\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30af\u30e9\u30b9\u968e\u5c64\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u3001\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u958b\u767a\u306b\u304a\u3044\u3066\u3001\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">\u5b9f\u8df5\u7684\u306aprotected\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u306f\u3001protected\u3092\u6700\u3082\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3067\u304d\u308b\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\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 GameCharacter {\nprotected:\n    \/\/ \u30d5\u30c3\u30af\u30e1\u30bd\u30c3\u30c9 - \u6d3e\u751f\u30af\u30e9\u30b9\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef\u80fd\n    virtual void initializeStats() = 0;\n    virtual void applySpecialAbilities() {\n        \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5b9f\u88c5\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09\n    }\n    virtual void updateAnimation() = 0;\n\n    \/\/ \u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9 - \u6d3e\u751f\u30af\u30e9\u30b9\u3067\u5229\u7528\u53ef\u80fd\n    void calculateBaseDamage() {\n        \/\/ \u57fa\u672c\u30c0\u30e1\u30fc\u30b8\u8a08\u7b97\u30ed\u30b8\u30c3\u30af\n    }\n\npublic:\n    \/\/ \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9 - \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9aa8\u683c\u3092\u5b9a\u7fa9\n    void update(float deltaTime) {\n        updateAnimation();      \/\/ \u5fc5\u9808\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u30dd\u30a4\u30f3\u30c8\n        updatePhysics();       \/\/ \u5171\u901a\u51e6\u7406\n        applySpecialAbilities(); \/\/ \u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\u306a\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u30dd\u30a4\u30f3\u30c8\n    }\n\nprivate:\n    void updatePhysics() {\n        \/\/ \u7269\u7406\u6f14\u7b97\u306e\u5171\u901a\u51e6\u7406\n    }\n};\n\nclass Warrior : public GameCharacter {\nprotected:\n    void initializeStats() override {\n        \/\/ \u6226\u58eb\u56fa\u6709\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u521d\u671f\u5316\n    }\n\n    void updateAnimation() override {\n        \/\/ \u6226\u58eb\u56fa\u6709\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u66f4\u65b0\n    }\n\n    void applySpecialAbilities() override {\n        GameCharacter::applySpecialAbilities(); \/\/ \u57fa\u5e95\u30af\u30e9\u30b9\u306e\u51e6\u7406\u3092\u547c\u3073\u51fa\u3057\n        \/\/ \u6226\u58eb\u56fa\u6709\u306e\u7279\u6b8a\u80fd\u529b\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30de\u30e9\u30bd\u30f3\u5316\u3055\u308c\u305f\u30af\u30e9\u30b9\u8a2d\u8a08\u3067\u306e\u4f7f\u7528\u4f8b<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306f\u3001protected\u30e1\u30f3\u30d0\u30fc\u3092\u4f7f\u7528\u3057\u3066\u62e1\u5f35\u6027\u306e\u9ad8\u3044API\u3092\u8a2d\u8a08\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DatabaseConnection {\nprotected:\n    \/\/ \u63a5\u7d9a\u72b6\u614b\u306e\u7ba1\u7406\n    enum class State { Disconnected, Connecting, Connected, Failed };\n    State currentState = State::Disconnected;\n\n    \/\/ \u6d3e\u751f\u30af\u30e9\u30b9\u3067\u4f7f\u7528\u3059\u308b\u5171\u901a\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\n    void setConnectionState(State newState) {\n        currentState = newState;\n        notifyStateChange();\n    }\n\n    \/\/ \u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u30dd\u30a4\u30f3\u30c8\n    virtual void onConnecting() = 0;\n    virtual void onDisconnecting() = 0;\n    virtual void executeRawQuery(const std::string&amp; query) = 0;\n\n    \/\/ \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u7528\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\n    void handleError(const std::exception&amp; e) {\n        setConnectionState(State::Failed);\n        lastError = e.what();\n    }\n\nprivate:\n    std::string lastError;\n    void notifyStateChange() {\n        \/\/ \u72b6\u614b\u5909\u66f4\u901a\u77e5\u306e\u5b9f\u88c5\n    }\n\npublic:\n    bool connect(const std::string&amp; connectionString) {\n        try {\n            setConnectionState(State::Connecting);\n            onConnecting();\n            return true;\n        } catch (const std::exception&amp; e) {\n            handleError(e);\n            return false;\n        }\n    }\n};\n\n\/\/ PostgreSQL\u5b9f\u88c5\u4f8b\nclass PostgreSQLConnection : public DatabaseConnection {\nprotected:\n    void onConnecting() override {\n        \/\/ PostgreSQL\u56fa\u6709\u306e\u63a5\u7d9a\u51e6\u7406\n    }\n\n    void onDisconnecting() override {\n        \/\/ PostgreSQL\u56fa\u6709\u306e\u5207\u65ad\u51e6\u7406\n    }\n\n    void executeRawQuery(const std::string&amp; query) override {\n        \/\/ PostgreSQL\u56fa\u6709\u306e\u30af\u30a8\u30ea\u5b9f\u884c\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u958b\u767a\u3067\u306e\u5fdc\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>UI\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u4f8b\u3067\u3001protected\u30e1\u30f3\u30d0\u30fc\u3092\u6d3b\u7528\u3057\u305f\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u8a2d\u8a08\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=\"\">class UIComponent {\nprotected:\n    \/\/ \u30ec\u30a4\u30a2\u30a6\u30c8\u95a2\u9023\u306e\u4fdd\u8b77\u3055\u308c\u305f\u30e1\u30f3\u30d0\u30fc\n    struct LayoutInfo {\n        float x, y, width, height;\n        bool visible;\n    } layout;\n\n    \/\/ \u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u7528\u306e\u4eee\u60f3\u30e1\u30bd\u30c3\u30c9\n    virtual void onMouseEnter() {}\n    virtual void onMouseLeave() {}\n    virtual void onMouseClick() {}\n\n    \/\/ \u63cf\u753b\u7528\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\n    void drawBorder() {\n        \/\/ \u30dc\u30fc\u30c0\u30fc\u63cf\u753b\u306e\u5171\u901a\u5b9f\u88c5\n    }\n\n    void drawBackground() {\n        \/\/ \u80cc\u666f\u63cf\u753b\u306e\u5171\u901a\u5b9f\u88c5\n    }\n\n    \/\/ \u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef\u80fd\u306a\u63cf\u753b\u30e1\u30bd\u30c3\u30c9\n    virtual void drawContent() = 0;\n\npublic:\n    void render() {\n        if (!layout.visible) return;\n\n        drawBackground();\n        drawContent();\n        drawBorder();\n    }\n\n    void handleMouseEvent(const MouseEvent&amp; event) {\n        if (!layout.visible) return;\n\n        switch (event.type) {\n            case MouseEvent::Enter:\n                onMouseEnter();\n                break;\n            case MouseEvent::Leave:\n                onMouseLeave();\n                break;\n            case MouseEvent::Click:\n                onMouseClick();\n                break;\n        }\n    }\n};\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u30dc\u30bf\u30f3\u306e\u5b9f\u88c5\u4f8b\nclass CustomButton : public UIComponent {\nprotected:\n    void drawContent() override {\n        \/\/ \u30dc\u30bf\u30f3\u56fa\u6709\u306e\u63cf\u753b\u51e6\u7406\n    }\n\n    void onMouseEnter() override {\n        \/\/ \u30db\u30d0\u30fc\u30a8\u30d5\u30a7\u30af\u30c8\u306e\u5b9f\u88c5\n    }\n\n    void onMouseClick() override {\n        \/\/ \u30af\u30ea\u30c3\u30af\u30a8\u30d5\u30a7\u30af\u30c8\u3068\u51e6\u7406\u306e\u5b9f\u88c5\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u4f8b\u304c\u793a\u3059\u3088\u3046\u306b\u3001protected\u30e1\u30f3\u30d0\u30fc\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u7279\u306b\u6709\u52b9\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u30dd\u30a4\u30f3\u30c8\u306e\u63d0\u4f9b<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u9808\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\uff08pure virtual\uff09<\/li>\n\n\n\n<li>\u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\u306a\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\uff08virtual with default\uff09<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6d3e\u751f\u30af\u30e9\u30b9\u7528\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u306e\u63d0\u4f9b<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5171\u901a\u306e\u8a08\u7b97\u30ed\u30b8\u30c3\u30af<\/li>\n\n\n\n<li>\u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9<\/li>\n\n\n\n<li>\u72b6\u614b\u7ba1\u7406\u6a5f\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u62e1\u5f35\u6027\u306e\u78ba\u4fdd<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30e9\u30b0\u30a4\u30f3\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/li>\n\n\n\n<li>\u30e2\u30b8\u30e5\u30fc\u30eb\u5f0f\u8a2d\u8a08<\/li>\n\n\n\n<li>\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef\u80fd\u306a\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001protected\u30e1\u30f3\u30d0\u30fc\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u8a2d\u8a08\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">\u4fdd\u8b77\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30ab\u30d7\u30bb\u30eb\u5316\u3092\u5d29\u3055\u306a\u3044\u8a2d\u8a08\u306e\u30b3\u30c4<\/h3>\n\n\n\n<p>protected\u30e1\u30f3\u30d0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u30ab\u30d7\u30bb\u30eb\u5316\u3092\u9069\u5207\u306b\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u4e3b\u8981\u306a\u8a2d\u8a08\u539f\u5247\u3068\u5b9f\u88c5\u4f8b\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6700\u5c0f\u9650\u306e\u516c\u958b<\/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 DataProcessor {\nprotected:\n    \/\/ \u60aa\u3044\u4f8b\uff1a\u5185\u90e8\u30c7\u30fc\u30bf\u3092\u76f4\u63a5\u516c\u958b\n    std::vector&lt;int&gt; rawData;\n\n    \/\/ \u826f\u3044\u4f8b\uff1a\u30a2\u30af\u30bb\u30b5\u30e1\u30bd\u30c3\u30c9\u3092\u901a\u3058\u305f\u5236\u5fa1\n    const std::vector&lt;int&gt;&amp; getData() const {\n        return rawData;\n    }\n\n    void setData(const std::vector&lt;int&gt;&amp; newData) {\n        validateData(newData);  \/\/ \u30c7\u30fc\u30bf\u306e\u691c\u8a3c\n        rawData = newData;\n    }\n\nprivate:\n    void validateData(const std::vector&lt;int&gt;&amp; data) {\n        \/\/ \u30c7\u30fc\u30bf\u691c\u8a3c\u30ed\u30b8\u30c3\u30af\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u5b9f\u88c5\u306e\u5206\u96e2<\/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 GraphicsContext {\nprotected:\n    \/\/ \u60aa\u3044\u4f8b\uff1a\u5b9f\u88c5\u306e\u8a73\u7d30\u304c\u6f0f\u308c\u3066\u3044\u308b\n    void* deviceHandle;\n    int bufferSize;\n\n    \/\/ \u826f\u3044\u4f8b\uff1a\u62bd\u8c61\u5316\u3055\u308c\u305f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\n    virtual void initializeContext() = 0;\n    virtual void releaseResources() = 0;\n\n    \/\/ \u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\n    bool isContextValid() const {\n        return deviceHandle != nullptr;\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3078\u306e\u5bfe\u51e6\u6cd5<\/h3>\n\n\n\n<p>protected\u30e1\u30f3\u30d0\u30fc\u306b\u95a2\u9023\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3068\u3001\u305d\u306e\u5bfe\u51e6\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e0d\u5909\u6761\u4ef6\u306e\u4fdd\u8b77<\/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 SecureConnection {\nprotected:\n    \/\/ \u60aa\u3044\u4f8b\uff1a\u72b6\u614b\u3092\u76f4\u63a5\u5909\u66f4\u53ef\u80fd\n    bool isAuthenticated;\n\n    \/\/ \u826f\u3044\u4f8b\uff1a\u72b6\u614b\u5909\u66f4\u3092\u5236\u5fa1\n    void setAuthenticationStatus(bool status) {\n        if (!validateStateTransition(status)) {\n            throw std::runtime_error(\"Invalid state transition\");\n        }\n        isAuthenticated = status;\n    }\n\nprivate:\n    bool validateStateTransition(bool newStatus) {\n        \/\/ \u72b6\u614b\u9077\u79fb\u306e\u691c\u8a3c\u30ed\u30b8\u30c3\u30af\n        return true;  \/\/ \u5b9f\u969b\u306e\u5b9f\u88c5\u3067\u306f\u3088\u308a\u53b3\u5bc6\u306a\u691c\u8a3c\u3092\u884c\u3046\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30ea\u30bd\u30fc\u30b9\u306e\u5b89\u5168\u306a\u7ba1\u7406<\/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 ResourceManager {\nprotected:\n    \/\/ \u60aa\u3044\u4f8b\uff1a\u30ea\u30bd\u30fc\u30b9\u306e\u751f\u30dd\u30a4\u30f3\u30bf\u3092\u516c\u958b\n    void* rawResource;\n\n    \/\/ \u826f\u3044\u4f8b\uff1a\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3068RAII\u306e\u4f7f\u7528\n    std::unique_ptr&lt;Resource&gt; resource;\n\n    \/\/ \u30ea\u30bd\u30fc\u30b9\u64cd\u4f5c\u7528\u306e\u4fdd\u8b77\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9\n    void acquireResource() {\n        resource = std::make_unique&lt;Resource&gt;();\n    }\n\n    void releaseResource() {\n        resource.reset();  \/\/ \u81ea\u52d5\u7684\u306b\u30ea\u30bd\u30fc\u30b9\u3092\u89e3\u653e\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u660e\u78ba\u306a\u8cac\u4efb\u5206\u62c5<\/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 UIController {\nprotected:\n    \/\/ \u60aa\u3044\u4f8b\uff1a\u6df7\u5728\u3057\u305f\u8cac\u4efb\n    void handleEvent() {\n        updateUI();\n        processData();\n        saveState();\n    }\n\n    \/\/ \u826f\u3044\u4f8b\uff1a\u8cac\u4efb\u306e\u5206\u96e2\n    virtual void onUIUpdate() = 0;\n    virtual void onDataProcess() = 0;\n    virtual void onStateSave() = 0;\n\n    \/\/ \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\n    void handleEventImpl() {\n        onUIUpdate();\n        onDataProcess();\n        onStateSave();\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u306e\u78ba\u4fdd<\/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 DataAnalyzer {\nprotected:\n    \/\/ \u60aa\u3044\u4f8b\uff1a\u30c6\u30b9\u30c8\u56f0\u96e3\u306a\u8a2d\u8a08\n    void analyze() {\n        auto data = loadDataFromDatabase();\n        processData(data);\n    }\n\n    \/\/ \u826f\u3044\u4f8b\uff1a\u30c6\u30b9\u30c8\u53ef\u80fd\u306a\u8a2d\u8a08\n    virtual std::vector&lt;Data&gt; loadData() = 0;\n\n    void analyzeData() {\n        auto data = loadData();  \/\/ \u4f9d\u5b58\u6027\u306e\u6ce8\u5165\u304c\u53ef\u80fd\n        processData(data);\n    }\n};\n\n\/\/ \u30c6\u30b9\u30c8\u7528\u306e\u30e2\u30c3\u30af\u30af\u30e9\u30b9\nclass MockDataAnalyzer : public DataAnalyzer {\nprotected:\n    std::vector&lt;Data&gt; loadData() override {\n        return testData;  \/\/ \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u8fd4\u3059\n    }\n\nprivate:\n    std::vector&lt;Data&gt; testData;\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316\u3068\u547d\u540d\u898f\u5247<\/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 NetworkService {\nprotected:\n    \/\/ \u60aa\u3044\u4f8b\uff1a\u4e0d\u660e\u78ba\u306a\u547d\u540d\u3068\u8aac\u660e\u4e0d\u8db3\n    void process();\n\n    \/\/ \u826f\u3044\u4f8b\uff1a\u660e\u78ba\u306a\u547d\u540d\u3068\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\n    \/\/\/ @brief \u53d7\u4fe1\u3057\u305f\u30c7\u30fc\u30bf\u3092\u975e\u540c\u671f\u3067\u51e6\u7406\u3059\u308b\n    \/\/\/ @param data \u51e6\u7406\u5bfe\u8c61\u306e\u30c7\u30fc\u30bf\n    \/\/\/ @throws NetworkException \u63a5\u7d9a\u30a8\u30e9\u30fc\u6642\n    virtual void processReceivedData(const DataPacket&amp; data) = 0;\n\n    \/\/ \u5b9f\u88c5\u7528\u306e\u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9\n    void validatePacket(const DataPacket&amp; packet) {\n        \/\/ \u30d1\u30b1\u30c3\u30c8\u691c\u8a3c\u30ed\u30b8\u30c3\u30af\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b88\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u5b89\u5168\u6027\u5411\u4e0a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u9632\u6b62<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u30ea\u30bd\u30fc\u30b9\u306e\u9069\u5207\u306a\u7ba1\u7406<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u5411\u4e0a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/li>\n\n\n\n<li>\u30c7\u30d0\u30c3\u30b0\u306e\u5bb9\u6613\u5316<\/li>\n\n\n\n<li>\u6a5f\u80fd\u62e1\u5f35\u306e\u7c21\u7d20\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c1\u30fc\u30e0\u958b\u767a\u306e\u52b9\u7387\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8a2d\u8a08\u610f\u56f3\u306e\u660e\u78ba\u5316<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u52b9\u7387\u5316<\/li>\n\n\n\n<li>\u77e5\u8b58\u79fb\u8ee2\u306e\u4fc3\u9032<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">\u73fe\u5834\u3067\u6d3b\u304d\u308bprotected\u6d3b\u7528\u8853<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u624b\u6cd5<\/h3>\n\n\n\n<p>\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u3092\u6539\u5584\u3059\u308b\u969b\u306e\u3001protected\u3092\u6d3b\u7528\u3057\u305f\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u624b\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6bb5\u968e\u7684\u306a\u30ab\u30d7\u30bb\u30eb\u5316\u306e\u6539\u5584<\/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=\"\">\/\/ \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u524d\u306e\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\nclass LegacyProcessor {\npublic:  \/\/ \u3059\u3079\u3066\u306e\u30e1\u30f3\u30d0\u30fc\u304c\u516c\u958b\u3055\u308c\u3066\u3044\u308b\n    std::vector&lt;std::string&gt; data;\n    void processData() { \/* \u51e6\u7406\u30ed\u30b8\u30c3\u30af *\/ }\n    void validateData() { \/* \u691c\u8a3c\u30ed\u30b8\u30c3\u30af *\/ }\n};\n\n\/\/ \u6bb5\u968e1: protected\u5c0e\u5165\u306b\u3088\u308b\u6bb5\u968e\u7684\u306a\u30ab\u30d7\u30bb\u30eb\u5316\nclass ImprovedProcessor {\nprotected:\n    std::vector&lt;std::string&gt; data;  \/\/ \u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\n    virtual void validateData() {    \/\/ \u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef\u80fd\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u660e\u78ba\u5316\n        \/\/ \u691c\u8a3c\u30ed\u30b8\u30c3\u30af\n    }\n\npublic:\n    void processData() {\n        validateData();  \/\/ \u691c\u8a3c\u3092\u5f37\u5236\n        \/\/ \u51e6\u7406\u30ed\u30b8\u30c3\u30af\n    }\n};\n\n\/\/ \u6bb5\u968e2: \u3055\u3089\u306a\u308b\u6539\u5584\u3068\u62e1\u5f35\u6027\u306e\u5411\u4e0a\nclass ModernProcessor {\nprotected:\n    \/\/ \u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u306e\u62bd\u8c61\u5316\n    virtual std::vector&lt;std::string&gt; getData() const {\n        return data;\n    }\n\n    virtual void setData(const std::vector&lt;std::string&gt;&amp; newData) {\n        validateData(newData);\n        data = newData;\n    }\n\n    \/\/ \u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u30dd\u30a4\u30f3\u30c8\u306e\u63d0\u4f9b\n    virtual void preProcess() {}\n    virtual void postProcess() {}\n\nprivate:\n    std::vector&lt;std::string&gt; data;\n\n    void validateData(const std::vector&lt;std::string&gt;&amp; input) {\n        \/\/ \u691c\u8a3c\u30ed\u30b8\u30c3\u30af\n    }\n\npublic:\n    void processData() {\n        preProcess();\n        \/\/ \u51e6\u7406\u30ed\u30b8\u30c3\u30af\n        postProcess();\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u305fprotected\u30e1\u30f3\u30d0\u30fc\u306e\u6d3b\u7528\u65b9\u6cd5\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=\"\">\/\/ \u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u3092\u8003\u616e\u3057\u305f\u57fa\u5e95\u30af\u30e9\u30b9\nclass DataService {\nprotected:\n    virtual std::string fetchData(const std::string&amp; source) = 0;\n    virtual void processData(const std::string&amp; data) = 0;\n\n    \/\/ \u30c6\u30b9\u30c8\u7528\u306e\u30d5\u30c3\u30af\n    virtual bool isConnectionValid() {\n        return true;\n    }\n\n    virtual void logError(const std::string&amp; message) {\n        \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30ed\u30b0\u51e6\u7406\n    }\n\npublic:\n    void executeOperation(const std::string&amp; source) {\n        if (!isConnectionValid()) {\n            logError(\"Connection invalid\");\n            return;\n        }\n\n        auto data = fetchData(source);\n        processData(data);\n    }\n};\n\n\/\/ \u5b9f\u904b\u7528\u30af\u30e9\u30b9\nclass ProductionDataService : public DataService {\nprotected:\n    std::string fetchData(const std::string&amp; source) override {\n        \/\/ \u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u51e6\u7406\n        return \"real data\";\n    }\n\n    void processData(const std::string&amp; data) override {\n        \/\/ \u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u51e6\u7406\n    }\n};\n\n\/\/ \u30c6\u30b9\u30c8\u7528\u30af\u30e9\u30b9\nclass TestableDataService : public DataService {\nprotected:\n    std::string fetchData(const std::string&amp; source) override {\n        return testData;  \/\/ \u30c6\u30b9\u30c8\u30c7\u30fc\u30bf\u3092\u8fd4\u3059\n    }\n\n    void processData(const std::string&amp; data) override {\n        processedData = data;  \/\/ \u51e6\u7406\u7d50\u679c\u3092\u691c\u8a3c\u7528\u306b\u4fdd\u5b58\n    }\n\npublic:  \/\/ \u30c6\u30b9\u30c8\u7528\u306e\u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9\n    void setTestData(const std::string&amp; data) {\n        testData = data;\n    }\n\n    std::string getProcessedData() const {\n        return processedData;\n    }\n\nprivate:\n    std::string testData;\n    std::string processedData;\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306e\u30a8\u30c7\u30a3\u30bf\u30fc\u306e\u4f8b<\/h3>\n\n\n\n<p>\u5b9f\u969b\u306e\u30c1\u30fc\u30e0\u958b\u767a\u3067\u4f7f\u7528\u3055\u308c\u308b\u3001protected\u3092\u6d3b\u7528\u3057\u305f\u30a8\u30c7\u30a3\u30bf\u30fc\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5b9f\u88c5\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u5e95\u30a8\u30c7\u30a3\u30bf\u30fc\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\nclass EditorComponent {\nprotected:\n    \/\/ \u5171\u901a\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\n    void notifyContentChanged() {\n        for (auto&amp; listener : changeListeners) {\n            listener-&gt;onContentChanged();\n        }\n    }\n\n    \/\/ \u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u53ef\u80fd\u306a\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\n    virtual void onKeyPressed(const KeyEvent&amp; event) = 0;\n    virtual void onMouseEvent(const MouseEvent&amp; event) = 0;\n\n    \/\/ \u5171\u901a\u306e\u72b6\u614b\u7ba1\u7406\n    struct EditorState {\n        bool isReadOnly;\n        bool isDirty;\n        std::string content;\n    } state;\n\n    \/\/ \u4fdd\u8b77\u3055\u308c\u305f\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\n    bool isValidOperation() const {\n        return !state.isReadOnly;\n    }\n\nprivate:\n    std::vector&lt;IChangeListener*&gt; changeListeners;\n\npublic:\n    void addChangeListener(IChangeListener* listener) {\n        changeListeners.push_back(listener);\n    }\n};\n\n\/\/ \u30c6\u30ad\u30b9\u30c8\u30a8\u30c7\u30a3\u30bf\u30fc\u5b9f\u88c5\nclass TextEditor : public EditorComponent {\nprotected:\n    void onKeyPressed(const KeyEvent&amp; event) override {\n        if (!isValidOperation()) return;\n\n        switch (event.keyCode) {\n            case KeyCode::Backspace:\n                handleBackspace();\n                break;\n            case KeyCode::Delete:\n                handleDelete();\n                break;\n            default:\n                handleTextInput(event.character);\n                break;\n        }\n    }\n\n    void onMouseEvent(const MouseEvent&amp; event) override {\n        updateCursorPosition(event.position);\n    }\n\nprivate:\n    void handleBackspace() {\n        \/\/ \u30d0\u30c3\u30af\u30b9\u30da\u30fc\u30b9\u51e6\u7406\n        notifyContentChanged();\n    }\n\n    void handleDelete() {\n        \/\/ \u524a\u9664\u51e6\u7406\n        notifyContentChanged();\n    }\n\n    void handleTextInput(char c) {\n        \/\/ \u30c6\u30ad\u30b9\u30c8\u5165\u529b\u51e6\u7406\n        notifyContentChanged();\n    }\n\n    void updateCursorPosition(const Point&amp; pos) {\n        \/\/ \u30ab\u30fc\u30bd\u30eb\u4f4d\u7f6e\u66f4\u65b0\n    }\n};\n\n\/\/ \u30b3\u30fc\u30c9\u30a8\u30c7\u30a3\u30bf\u30fc\u5b9f\u88c5\uff08\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30cf\u30a4\u30e9\u30a4\u30c8\u6a5f\u80fd\u4ed8\u304d\uff09\nclass CodeEditor : public TextEditor {\nprotected:\n    void onKeyPressed(const KeyEvent&amp; event) override {\n        TextEditor::onKeyPressed(event);  \/\/ 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