{"id":1857,"date":"2025-03-24T08:49:47","date_gmt":"2025-03-23T23:49:47","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1857"},"modified":"2025-03-24T08:49:47","modified_gmt":"2025-03-23T23:49:47","slug":"c-extern%e3%81%ae%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a%e5%a4%89%e6%95%b0%e3%83%bb%e9%96%a2%e6%95%b0%e3%81%ae%e5%85%b1%e6%9c%89%e3%82%92%e6%9c%80%e9%81%a9%e5%8c%96%e3%81%99%e3%82%8b7","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1857","title":{"rendered":"C++ extern\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u5909\u6570\u30fb\u95a2\u6570\u306e\u5171\u6709\u3092\u6700\u9069\u5316\u3059\u308b7\u3064\u306e\u5b9f\u8df5\u4f8b"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">C++ extern\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u307e\u3067\u5fb9\u5e95\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">extern\u30ad\u30fc\u30ef\u30fc\u30c9\u304c\u89e3\u6c7a\u3059\u308b3\u3064\u306e\u8ab2\u984c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">C++\u306b\u304a\u3051\u308bextern\u306e\u5f79\u5272\u3068\u91cd\u8981\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-5\">extern \u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-6\">\u5909\u6570\u5ba3\u8a00\u3068 extern \u306e\u95a2\u4fc2\u6027\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-9\">\u95a2\u6570\u5ba3\u8a00\u3067 extern \u3092\u4f7f\u3046\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">\u5b9f\u8df5\u7684\u306aextern\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u9593\u3067\u306e\u5909\u6570\u5171\u6709\u306e\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-18\">\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u3067extern\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>      <li>        <a href=\"#i-21\">\u540d\u524d\u7a7a\u9593\u3068extern\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-24\">extern\u306b\u3088\u308b\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3068\u305d\u306e\u89e3\u6c7a\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-25\">\u30ea\u30f3\u30b1\u30fc\u30b8\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-28\">\u91cd\u8907\u5b9a\u7fa9\u3092\u9632\u3050\u305f\u3081\u306e\u5177\u4f53\u7684\u306a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-32\">\u30a8\u30e9\u30fc\u89e3\u6c7a\u306e\u305f\u3081\u306e\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-36\">\u30a8\u30e9\u30fc\u9632\u6b62\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-37\">\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306eextern\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-38\">\u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u6700\u9069\u5316\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-41\">\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308bextern \u306e\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-45\">extern \u306e\u5fdc\u7528\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-46\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3068 extern \u306e\u4f75\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-49\">DLL \u3067 extern \u3092\u4f7f\u3046\u969b\u306e\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-53\">\u5b9f\u88c5\u4e0a\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-54\">extern \u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u4f7f\u3044\u5206\u3051<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-55\">\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3068\u306e\u6bd4\u8f03<\/a>      <\/li>      <li>        <a href=\"#i-58\">\u9759\u7684\u306a\u5909\u6570\u3068\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-61\">\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u306e\u9078\u629e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/a>      <\/li>      <li>        <a href=\"#i-62\">\u5b9f\u88c5\u4f8b\uff1a\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u30a2\u30d7\u30ed\u30fc\u30c1<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-63\">\u9078\u629e\u57fa\u6e96\u306e\u307e\u3068\u3081<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">C++ extern\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u307e\u3067\u5fb9\u5e95\u89e3\u8aac<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">extern\u30ad\u30fc\u30ef\u30fc\u30c9\u304c\u89e3\u6c7a\u3059\u308b3\u3064\u306e\u8ab2\u984c<\/h3>\n\n\n\n<p>C++\u306eextern\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3001\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u958b\u767a\u306b\u304a\u3044\u3066\u76f4\u9762\u3059\u308b\u4ee5\u4e0b\u306e3\u3064\u306e\u91cd\u8981\u306a\u8ab2\u984c\u3092\u89e3\u6c7a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5909\u6570\u306e\u91cd\u8907\u5b9a\u7fa9\u306e\u9632\u6b62<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u3067\u540c\u3058\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u91cd\u8907\u5b9a\u7fa9\u3092\u9632\u304e\u307e\u3059<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u300c\u3053\u306e\u5909\u6570\u306f\u4ed6\u306e\u5834\u6240\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u300d\u3053\u3068\u3092\u4f1d\u3048\u307e\u3059<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u95a2\u6570\u306e\u53ef\u8996\u6027\u5236\u5fa1<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u306e\u5ba3\u8a00\u3068\u5b9a\u7fa9\u3092\u5206\u96e2\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/li>\n\n\n\n<li>\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u95a2\u6570\u5ba3\u8a00\u6642\u306b\u6697\u9ed9\u7684\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u5171\u6709\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u9593\u3067\u5909\u6570\u3092\u5b89\u5168\u306b\u5171\u6709\u3067\u304d\u307e\u3059<\/li>\n\n\n\n<li>\u30ea\u30f3\u30b1\u30fc\u30b8\u306e\u7a2e\u985e\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3067\u304d\u307e\u3059<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">C++\u306b\u304a\u3051\u308bextern\u306e\u5f79\u5272\u3068\u91cd\u8981\u6027<\/h3>\n\n\n\n<p>extern\u30ad\u30fc\u30ef\u30fc\u30c9\u306fC++\u306e<strong>\u30ea\u30f3\u30b1\u30fc\u30b8<\/strong>\u3092\u5236\u5fa1\u3059\u308b\u91cd\u8981\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u5f79\u5272\u304c\u3042\u308a\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=\"\">\/\/ file1.cpp\nint global_counter = 0;  \/\/ \u5909\u6570\u306e\u5b9a\u7fa9\n\n\/\/ file2.cpp\nextern int global_counter;  \/\/ \u5909\u6570\u306e\u5ba3\u8a00\uff08\u5b9a\u7fa9\u306f\u4ed6\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u3042\u308b\uff09\nvoid increment() {\n    global_counter++;  \/\/ file1.cpp\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-3\">\u30ea\u30f3\u30b1\u30fc\u30b8\u306e\u7a2e\u985e\u3068extern\u306e\u5f71\u97ff<\/h4>\n\n\n\n<p>extern\u306f\u5909\u6570\u3084\u95a2\u6570\u306b<strong>\u5916\u90e8\u30ea\u30f3\u30b1\u30fc\u30b8<\/strong>\u3092\u4ed8\u4e0e\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5916\u90e8\u30ea\u30f3\u30b1\u30fc\u30b8\uff08External Linkage\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>extern\u30ad\u30fc\u30ef\u30fc\u30c9\u306b\u3088\u3063\u3066\u6307\u5b9a<\/li>\n\n\n\n<li>\u4ed6\u306e\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/li>\n\n\n\n<li>\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u30671\u3064\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5185\u90e8\u30ea\u30f3\u30b1\u30fc\u30b8\uff08Internal Linkage\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>static\u30ad\u30fc\u30ef\u30fc\u30c9\u306b\u3088\u3063\u3066\u6307\u5b9a<\/li>\n\n\n\n<li>\u540c\u3058\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u5185\u3067\u306e\u307f\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30eb\u3054\u3068\u306b\u72ec\u7acb\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-4\">extern\u306e\u91cd\u8981\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u5909\u6570\u5ba3\u8a00<\/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=\"\">\/\/ config.h\nextern const int MAX_CONNECTIONS;  \/\/ \u5b9a\u6570\u306e\u5ba3\u8a00\n\n\/\/ config.cpp\nconst int MAX_CONNECTIONS = 100;  \/\/ \u5b9f\u969b\u306e\u5b9a\u7fa9<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30af\u30e9\u30b9\u9759\u7684\u30e1\u30f3\u30d0\u306e\u5b9a\u7fa9<\/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=\"\">\/\/ MyClass.h\nclass MyClass {\n    static int instance_count;  \/\/ \u9759\u7684\u30e1\u30f3\u30d0\u306e\u5ba3\u8a00\n};\n\n\/\/ MyClass.cpp\nint MyClass::instance_count = 0;  \/\/ \u9759\u7684\u30e1\u30f3\u30d0\u306e\u5b9a\u7fa9<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u5171\u6709<\/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=\"\">\/\/ globals.h\nextern int shared_data[];  \/\/ \u914d\u5217\u306e\u5ba3\u8a00\n\n\/\/ globals.cpp\nint shared_data[1000];  \/\/ \u914d\u5217\u306e\u5b9f\u969b\u306e\u5b9a\u7fa9<\/pre>\n\n\n\n<p>extern\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e<strong>\u30e2\u30b8\u30e5\u30fc\u30eb\u6027\u306e\u5411\u4e0a<\/strong><\/li>\n\n\n\n<li><strong>\u5909\u6570\u306e\u91cd\u8907\u5b9a\u7fa9\u306e\u9632\u6b62<\/strong><\/li>\n\n\n\n<li><strong>\u30ea\u30f3\u30b1\u30fc\u30b8\u30a8\u30e9\u30fc\u306e\u4e88\u9632<\/strong><\/li>\n\n\n\n<li><strong>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/strong><\/li>\n\n\n\n<li><strong>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u9593\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u57fa\u672c\u6982\u5ff5\u3092\u8e0f\u307e\u3048\u305f\u4e0a\u3067\u3001extern\u306e\u5177\u4f53\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-5\">extern \u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u5909\u6570\u5ba3\u8a00\u3068 extern \u306e\u95a2\u4fc2\u6027\u3092\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n<p>extern\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u305f\u5909\u6570\u306e\u5ba3\u8a00\u3068\u5b9a\u7fa9\u306e\u95a2\u4fc2\u306b\u3064\u3044\u3066\u3001\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-7\">\u57fa\u672c\u7684\u306a\u4f7f\u7528\u30d1\u30bf\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=\"\">\/\/ variables.h\nextern int shared_counter;      \/\/ \u5909\u6570\u306e\u5ba3\u8a00\nextern const double PI;         \/\/ \u5b9a\u6570\u306e\u5ba3\u8a00\nextern int data_array[];        \/\/ \u914d\u5217\u306e\u5ba3\u8a00\n\n\/\/ variables.cpp\nint shared_counter = 0;         \/\/ \u5909\u6570\u306e\u5b9a\u7fa9\nconst double PI = 3.14159;      \/\/ \u5b9a\u6570\u306e\u5b9a\u7fa9\nint data_array[100];           \/\/ \u914d\u5217\u306e\u5b9a\u7fa9<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-8\">extern\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u91cd\u8981\u306a\u30eb\u30fc\u30eb<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u3068\u5b9a\u7fa9\u306e\u533a\u5225<\/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=\"\">\/\/ \u6b63\u3057\u3044\u4f7f\u7528\u6cd5\nextern int counter;           \/\/ \u5ba3\u8a00\u306e\u307f\uff08\u521d\u671f\u5316\u306a\u3057\uff09\nextern const int MAX_SIZE;    \/\/ \u5b9a\u6570\u306e\u5ba3\u8a00\n\n\/\/ \u8aa4\u3063\u305f\u4f7f\u7528\u6cd5\nextern int wrong_counter = 0; \/\/ \u30a8\u30e9\u30fc\uff1aextern\u3067\u521d\u671f\u5316\u306f\u3067\u304d\u306a\u3044<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u914d\u5217\u30b5\u30a4\u30ba\u306e\u6307\u5b9a<\/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=\"\">\/\/ \u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\uff08.h\uff09\u3067\u306e\u5ba3\u8a00\nextern int array[];          \/\/ \u30b5\u30a4\u30ba\u6307\u5b9a\u306a\u3057\u3067\u5ba3\u8a00OK\nextern const int fixed[];    \/\/ \u5b9a\u6570\u914d\u5217\u306e\u5ba3\u8a00\n\n\/\/ \u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\uff08.cpp\uff09\u3067\u306e\u5b9a\u7fa9\nint array[50];              \/\/ \u5b9f\u969b\u306e\u30b5\u30a4\u30ba\u3092\u6307\u5b9a\nconst int fixed[] = {1, 2, 3}; \/\/ \u521d\u671f\u5316\u3068\u540c\u6642\u306b\u30b5\u30a4\u30ba\u6c7a\u5b9a<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30b9\u30b3\u30fc\u30d7\u3068\u30b9\u30c8\u30ec\u30fc\u30b8\u30af\u30e9\u30b9<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u3067\u306e\u4f7f\u7528\nextern int global_var;       \/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u5ba3\u8a00\n\nclass MyClass {\n    static int count;        \/\/ \u30af\u30e9\u30b9\u306e\u9759\u7684\u30e1\u30f3\u30d0\u5909\u6570\npublic:\n    static int getCount();\n};\n\n\/\/ \u5225\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u5b9a\u7fa9\nint global_var = 0;\nint MyClass::count = 0;      \/\/ \u9759\u7684\u30e1\u30f3\u30d0\u5909\u6570\u306e\u5b9a\u7fa9<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u95a2\u6570\u5ba3\u8a00\u3067 extern \u3092\u4f7f\u3046\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u95a2\u6570\u5ba3\u8a00\u306b\u304a\u3051\u308bextern\u306e\u4f7f\u7528\u65b9\u6cd5\u3068\u3001\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-10\">\u95a2\u6570\u5ba3\u8a00\u3067\u306eextern\u306e\u57fa\u672c<\/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=\"\">\/\/ functions.h\nextern void processData(int* data, size_t size);  \/\/ \u660e\u793a\u7684\u306aextern\nvoid calculateSum(int a, int b);                  \/\/ \u6697\u9ed9\u7684\u306aextern\n\n\/\/ functions.cpp\nvoid processData(int* data, size_t size) {\n    \/\/ \u5b9f\u88c5\n}\n\nvoid calculateSum(int a, int b) {\n    \/\/ \u5b9f\u88c5\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-11\">\u95a2\u6570\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3067\u306eextern\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=\"\">\/\/ templates.h\ntemplate&lt;typename T&gt;\nextern T maximum(T a, T b);  \/\/ \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u95a2\u6570\u306e\u5ba3\u8a00\n\n\/\/ templates.cpp\ntemplate&lt;typename T&gt;\nT maximum(T a, T b) {\n    return (a &gt; b) ? a : b;\n}\n\n\/\/ \u660e\u793a\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\ntemplate int maximum&lt;int&gt;(int, int);\ntemplate double maximum&lt;double&gt;(double, double);<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-12\">extern\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u63a8\u5968\u4e8b\u9805<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u95a2\u6570\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9<\/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=\"\">\/\/ \u6b63\u3057\u3044\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\nextern void print(int value);\nextern void print(double value);\nextern void print(const char* value);\n\n\/\/ \u5b9f\u88c5\nvoid print(int value) { \/* ... *\/ }\nvoid print(double value) { \/* ... *\/ }\nvoid print(const char* value) { \/* ... *\/ }<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>C++\u3068C\u306e\u95a2\u6570\u306e\u6df7\u5728<\/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=\"\">\/\/ C++\u304b\u3089C\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u5834\u5408\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n\nvoid c_style_function(int param);\n\n#ifdef __cplusplus\n}\n#endif<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30a4\u30f3\u30e9\u30a4\u30f3\u95a2\u6570\u3068\u306e\u95a2\u4fc2<\/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=\"\">\/\/ \u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\ninline int quick_add(int a, int b) {\n    return a + b;  \/\/ \u30a4\u30f3\u30e9\u30a4\u30f3\u95a2\u6570\u306f\u901a\u5e38extern\u306f\u4f7f\u7528\u3057\u306a\u3044\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-13\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u307e\u3068\u3081<\/h4>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3057\u3066\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u95a2\u6570\u5ba3\u8a00\u3067\u306f\u901a\u5e38extern\u3092\u660e\u793a\u7684\u306b\u66f8\u304f\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093<\/li>\n\n\n\n<li>C\u8a00\u8a9e\u3068\u306e\u4e92\u63db\u6027\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001extern \u201cC\u201d\u3092\u9069\u5207\u306b\u4f7f\u7528\u3057\u307e\u3059<\/li>\n\n\n\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u5fc5\u8981\u306a\u578b\u306e\u307f\u3092\u660e\u793a\u7684\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u307e\u3059<\/li>\n\n\n\n<li>\u30a4\u30f3\u30e9\u30a4\u30f3\u95a2\u6570\u3067\u306fextern\u306e\u4f7f\u7528\u3092\u907f\u3051\u307e\u3059<\/li>\n\n\n\n<li>\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u3067\u306f\u95a2\u6570\u306e\u5ba3\u8a00\u306e\u307f\u3092\u884c\u3044\u3001\u5b9a\u7fa9\u306f\u5225\u30d5\u30a1\u30a4\u30eb\u3067\u884c\u3044\u307e\u3059<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8907\u96d1\u306a\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3078\u3068\u9032\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-14\">\u5b9f\u8df5\u7684\u306aextern\u306e\u6d3b\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u9593\u3067\u306e\u5909\u6570\u5171\u6709\u306e\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u8907\u6570\u306e\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u9593\u3067\u5909\u6570\u3092\u52b9\u7387\u7684\u306b\u5171\u6709\u3059\u308b\u305f\u3081\u306e\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-16\">\u8a2d\u5b9a\u5024\u306e\u5171\u6709\u30d1\u30bf\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=\"\">\/\/ config.h\n#ifndef CONFIG_H\n#define CONFIG_H\n\nextern const struct AppConfig {\n    const int MAX_CONNECTIONS;\n    const char* SERVER_HOST;\n    const int SERVER_PORT;\n} APP_CONFIG;\n\n#endif\n\n\/\/ config.cpp\nconst AppConfig APP_CONFIG = {\n    100,              \/\/ MAX_CONNECTIONS\n    \"localhost\",      \/\/ SERVER_HOST\n    8080             \/\/ SERVER_PORT\n};\n\n\/\/ network.cpp\n#include \"config.h\"\nvoid initializeServer() {\n    Server server(APP_CONFIG.SERVER_HOST, APP_CONFIG.SERVER_PORT);\n    server.setMaxConnections(APP_CONFIG.MAX_CONNECTIONS);\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">\u30b9\u30ec\u30c3\u30c9\u9593\u3067\u306e\u72b6\u614b\u5171\u6709<\/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=\"\">\/\/ shared_state.h\n#ifndef SHARED_STATE_H\n#define SHARED_STATE_H\n\n#include &lt;mutex&gt;\n\nextern std::mutex state_mutex;\nextern int shared_counter;\n\nvoid incrementCounter();\nint getCounter();\n\n#endif\n\n\/\/ shared_state.cpp\n#include \"shared_state.h\"\n\nstd::mutex state_mutex;\nint shared_counter = 0;\n\nvoid incrementCounter() {\n    std::lock_guard&lt;std::mutex&gt; lock(state_mutex);\n    shared_counter++;\n}\n\nint getCounter() {\n    std::lock_guard&lt;std::mutex&gt; lock(state_mutex);\n    return shared_counter;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u3067extern\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-19\">\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u30ac\u30fc\u30c9\u3068\u306e\u95a2\u4fc2<\/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=\"\">\/\/ database.h\n#ifndef DATABASE_H\n#define DATABASE_H\n\n\/\/ \u524d\u65b9\u5ba3\u8a00\nclass Connection;\n\nextern Connection* global_connection;  \/\/ \u30dd\u30a4\u30f3\u30bf\u306e\u5ba3\u8a00\nextern const int MAX_POOL_SIZE;       \/\/ \u5b9a\u6570\u306e\u5ba3\u8a00\n\n#endif\n\n\/\/ database.cpp\n#include \"database.h\"\n#include \"connection.h\"  \/\/ \u5b8c\u5168\u306a\u5b9a\u7fa9\u304c\u5fc5\u8981\n\nConnection* global_connection = nullptr;\nconst int MAX_POOL_SIZE = 10;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-20\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3068extern\u306e\u7d44\u307f\u5408\u308f\u305b<\/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=\"\">\/\/ cache.h\n#ifndef CACHE_H\n#define CACHE_H\n\ntemplate&lt;typename T&gt;\nclass Cache {\n    static T default_value;\npublic:\n    static T getDefault();\n};\n\n\/\/ \u7279\u5b9a\u306e\u578b\u306b\u5bfe\u3059\u308b\u9759\u7684\u30e1\u30f3\u30d0\u306e\u5ba3\u8a00\nextern template class Cache&lt;int&gt;;\nextern template class Cache&lt;std::string&gt;;\n\n#endif\n\n\/\/ cache.cpp\n#include \"cache.h\"\n\n\/\/ \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u660e\u793a\u7684\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\ntemplate&lt;typename T&gt;\nT Cache&lt;T&gt;::default_value;\n\ntemplate&lt;typename T&gt;\nT Cache&lt;T&gt;::getDefault() {\n    return default_value;\n}\n\ntemplate class Cache&lt;int&gt;;\ntemplate class Cache&lt;std::string&gt;;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u540d\u524d\u7a7a\u9593\u3068extern\u306e\u7d44\u307f\u5408\u308f\u305b\u65b9<\/h3>\n\n\n\n<p>\u540d\u524d\u7a7a\u9593\u3092\u4f7f\u7528\u3057\u3066extern\u5909\u6570\u3092\u6574\u7406\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ system_resources.h\nnamespace SystemResources {\n    extern int available_memory;\n    extern int cpu_cores;\n\n    void initializeResources();\n    void cleanupResources();\n}\n\n\/\/ system_resources.cpp\nnamespace SystemResources {\n    int available_memory = 0;\n    int cpu_cores = 0;\n\n    void initializeResources() {\n        \/\/ \u30ea\u30bd\u30fc\u30b9\u306e\u521d\u671f\u5316\u51e6\u7406\n        available_memory = detectAvailableMemory();\n        cpu_cores = detectCPUCores();\n    }\n\n    void cleanupResources() {\n        available_memory = 0;\n        cpu_cores = 0;\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-22\">\u30b9\u30b3\u30fc\u30d7\u4ed8\u304d\u5909\u6570\u7ba1\u7406<\/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=\"\">\/\/ module_a.h\nnamespace ModuleA {\n    extern int module_state;\n    extern const char* module_name;\n}\n\n\/\/ module_a.cpp\nnamespace ModuleA {\n    int module_state = 0;\n    const char* module_name = \"Module A\";\n}\n\n\/\/ module_b.h\nnamespace ModuleB {\n    extern int module_state;  \/\/ ModuleA\u3068\u306f\u5225\u306e\u5909\u6570\n}\n\n\/\/ module_b.cpp\nnamespace ModuleB {\n    int module_state = 0;  \/\/ ModuleA\u306e\u5909\u6570\u3068\u306f\u72ec\u7acb\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5909\u6570\u306e\u53ef\u8996\u6027\u5236\u5fa1<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u30b9\u30b3\u30fc\u30d7\u3067extern\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u540d\u524d\u7a7a\u9593\u3092\u6d3b\u7528\u3057\u3066\u5909\u6570\u3092\u6574\u7406<\/li>\n\n\n\n<li>const\u4fee\u98fe\u5b50\u3092\u9069\u5207\u306b\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u30c6\u30a3<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5171\u6709\u5909\u6570\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u9069\u5207\u306b\u540c\u671f<\/li>\n\n\n\n<li>\u30a2\u30c8\u30df\u30c3\u30af\u578b\u306e\u6d3b\u7528<\/li>\n\n\n\n<li>\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u306b\u3088\u308b\u4fdd\u8b77<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u9806\u5e8f\u306e\u8003\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   \/\/ initialization.cpp\n   namespace {\n       \/\/ \u30d5\u30a1\u30a4\u30eb\u30b9\u30b3\u30fc\u30d7\u306e\u521d\u671f\u5316\u95a2\u6570\n       bool initializeGlobals() {\n           \/\/ \u521d\u671f\u5316\u51e6\u7406\n           return true;\n       }\n\n       \/\/ \u521d\u671f\u5316\u306e\u4fdd\u8a3c\n       const bool globals_initialized = initializeGlobals();\n   }<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\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\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-24\">extern\u306b\u3088\u308b\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3068\u305d\u306e\u89e3\u6c7a\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u30ea\u30f3\u30b1\u30fc\u30b8\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-26\">1. \u672a\u5b9a\u7fa9\u53c2\u7167\u30a8\u30e9\u30fc\uff08Undefined Reference\uff09<\/h4>\n\n\n\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001extern\u3067\u5ba3\u8a00\u3055\u308c\u305f\u5909\u6570\u3084\u95a2\u6570\u306e\u5b9a\u7fa9\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ common.h\nextern int global_value;  \/\/ \u5ba3\u8a00\u306e\u307f\n\n\/\/ main.cpp\n#include \"common.h\"\nint main() {\n    global_value = 42;    \/\/ \u30ea\u30f3\u30af\u30a8\u30e9\u30fc\uff1aglobal_value\u306e\u5b9a\u7fa9\u304c\u306a\u3044\n    return 0;\n}<\/pre>\n\n\n\n<p><strong>\u89e3\u6c7a\u7b56\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ common.cpp \u3092\u4f5c\u6210\u3057\u3066\u5b9a\u7fa9\u3092\u8ffd\u52a0\n#include \"common.h\"\nint global_value = 0;  \/\/ \u5b9a\u7fa9\u3092\u63d0\u4f9b\n\n\/\/ \u307e\u305f\u306f\u3001\u30a4\u30f3\u30e9\u30a4\u30f3\u5909\u6570\u3068\u3057\u3066\u5b9a\u7fa9\uff08C++17\u4ee5\u964d\uff09\ninline int global_value = 0;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-27\">2. \u591a\u91cd\u5b9a\u7fa9\u30a8\u30e9\u30fc\uff08Multiple Definition\uff09<\/h4>\n\n\n\n<p>\u540c\u3058\u5909\u6570\u304c\u8907\u6570\u306e\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ config.h\n\/\/ \u8aa4\u3063\u305f\u5b9f\u88c5\nint shared_config = 100;  \/\/ \u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u5b9a\u7fa9\n\n\/\/ module1.cpp \u3068 module2.cpp \u306e\u4e21\u65b9\u304c config.h \u3092\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\n\/\/ \u2192 \u591a\u91cd\u5b9a\u7fa9\u30a8\u30e9\u30fc<\/pre>\n\n\n\n<p><strong>\u89e3\u6c7a\u7b56\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ config.h\nextern int shared_config;  \/\/ \u5ba3\u8a00\u306e\u307f\n\n\/\/ config.cpp\nint shared_config = 100;  \/\/ \u4e00\u7b87\u6240\u3067\u306e\u5b9a\u7fa9<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-28\">\u91cd\u8907\u5b9a\u7fa9\u3092\u9632\u3050\u305f\u3081\u306e\u5177\u4f53\u7684\u306a\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-29\">1. \u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u30ac\u30fc\u30c9\u306e\u9069\u5207\u306a\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=\"\">\/\/ settings.h\n#ifndef SETTINGS_H\n#define SETTINGS_H\n\n\/\/ \u5b9a\u6570\u306e\u5ba3\u8a00\nextern const int MAX_BUFFER_SIZE;\nextern const char* DEFAULT_CONFIG_PATH;\n\n\/\/ \u30af\u30e9\u30b9\u5b9a\u7fa9\nclass Settings {\n    static Settings* instance;\npublic:\n    static Settings&amp; getInstance();\n};\n\n#endif \/\/ SETTINGS_H\n\n\/\/ settings.cpp\n#include \"settings.h\"\n\nconst int MAX_BUFFER_SIZE = 1024;\nconst char* DEFAULT_CONFIG_PATH = \"\/etc\/app\/config\";\n\nSettings* Settings::instance = nullptr;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-30\">2. ODR\uff08One Definition Rule\uff09\u9055\u53cd\u306e\u9632\u6b62<\/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=\"\">\/\/ constants.h\n\/\/ \u60aa\u3044\u4f8b\uff1a\u30a4\u30f3\u30e9\u30a4\u30f3\u5909\u6570\u3067\u306a\u3044\u5b9a\u6570\u3092\u30d8\u30c3\u30c0\u3067\u5b9a\u7fa9\nconst int BAD_CONSTANT = 100;  \/\/ ODR\u9055\u53cd\u306e\u53ef\u80fd\u6027\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u30a4\u30f3\u30e9\u30a4\u30f3\u5909\u6570\u3068\u3057\u3066\u5b9a\u7fa9\uff08C++17\u4ee5\u964d\uff09\ninline const int GOOD_CONSTANT = 100;\n\n\/\/ \u307e\u305f\u306fextern\u3092\u4f7f\u7528\nextern const int BETTER_CONSTANT;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-31\">3. \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u5916\u90e8\u30ea\u30f3\u30b1\u30fc\u30b8<\/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=\"\">\/\/ template_manager.h\ntemplate&lt;typename T&gt;\nclass ResourceManager {\n    static T* resource;\npublic:\n    static T* getResource();\n};\n\n\/\/ \u7279\u5b9a\u306e\u578b\u306b\u5bfe\u3059\u308b\u660e\u793a\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3092\u5ba3\u8a00\nextern template class ResourceManager&lt;int&gt;;\n\n\/\/ template_manager.cpp\ntemplate&lt;typename T&gt;\nT* ResourceManager&lt;T&gt;::resource = nullptr;\n\ntemplate&lt;typename T&gt;\nT* ResourceManager&lt;T&gt;::getResource() {\n    if (!resource) {\n        resource = new T();\n    }\n    return resource;\n}\n\n\/\/ \u660e\u793a\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\ntemplate class ResourceManager&lt;int&gt;;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-32\">\u30a8\u30e9\u30fc\u89e3\u6c7a\u306e\u305f\u3081\u306e\u30c7\u30d0\u30c3\u30b0\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-33\">1. \u30b3\u30f3\u30d1\u30a4\u30e9\u30d5\u30e9\u30b0\u306e\u6d3b\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=\"\"># \u30ea\u30f3\u30b1\u30fc\u30b8\u60c5\u5831\u306e\u8868\u793a\ng++ -v main.cpp\ng++ -Wl,--verbose main.cpp\n\n# \u672a\u5b9a\u7fa9\u30b7\u30f3\u30dc\u30eb\u306e\u30c1\u30a7\u30c3\u30af\ng++ -Wl,--no-undefined main.cpp\n\n# \u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u306e\u8ffd\u52a0\ng++ -g main.cpp<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-34\">2. \u30b7\u30f3\u30dc\u30eb\u30c6\u30fc\u30d6\u30eb\u306e\u78ba\u8a8d<\/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=\"\"># \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u30b7\u30f3\u30dc\u30eb\u78ba\u8a8d\nnm module.o\n\n# \u52d5\u7684\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f9d\u5b58\u95a2\u4fc2\u78ba\u8a8d\nldd .\/application<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">3. \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/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=\"\">\/\/ guard.h\n#ifndef GUARD_H\n#define GUARD_H\n\n\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\nstatic_assert(sizeof(void*) == 8, \"64-bit platform required\");\n\n\/\/ extern\u5909\u6570\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\nextern int critical_value;\ninline void validateExternVariable() {\n    volatile int* ptr = &amp;critical_value;\n    (void)ptr;  \/\/ \u672a\u4f7f\u7528\u8b66\u544a\u306e\u6291\u5236\n}\n\n#endif<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-36\">\u30a8\u30e9\u30fc\u9632\u6b62\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5ba3\u8a00\u3068\u5b9a\u7fa9\u306e\u5206\u96e2<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d8\u30c3\u30c0\u30d5\u30a1\u30a4\u30eb\u306b\u306f\u5ba3\u8a00\u306e\u307f\u3092\u8a18\u8ff0<\/li>\n\n\n\n<li>\u5b9a\u7fa9\u306f\u5358\u4e00\u306e\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u306b\u8a18\u8ff0<\/li>\n\n\n\n<li>\u30a4\u30f3\u30e9\u30a4\u30f3\u5909\u6570\u3092\u9069\u5207\u306b\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u540d\u524d\u7a7a\u9593\u306e\u6d3b\u7528<\/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=\"\">   namespace Config {\n       extern int value;  \/\/ \u5ba3\u8a00\n   }\n\n   \/\/ Config::value \u3068\u3057\u3066\u53c2\u7167\u3059\u308b\u3053\u3068\u3067\u885d\u7a81\u3092\u9632\u3050<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>constexpr\u306e\u6d3b\u7528<\/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=\"\">   \/\/ constants.h\n   constexpr int COMPILE_TIME_CONSTANT = 42;  \/\/ extern\u306f\u4e0d\u8981<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001extern\u306b\u95a2\u9023\u3059\u308b\u591a\u304f\u306e\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-37\">\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306eextern\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-38\">\u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u6700\u9069\u5316\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-39\">1. \u30d5\u30a1\u30af\u30c8\u30ea\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3057\u305f\u4f9d\u5b58\u6027\u306e\u7ba1\u7406<\/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=\"\">\/\/ factory.h\nclass IConnectionFactory {\npublic:\n    virtual ~IConnectionFactory() = default;\n    virtual Connection* createConnection() = 0;\n};\n\nextern IConnectionFactory* g_connectionFactory;  \/\/ \u30d5\u30a1\u30af\u30c8\u30ea\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5ba3\u8a00\n\n\/\/ factory.cpp\n\/\/ \u5b9f\u88c5\u306e\u8a73\u7d30\u3092\u96a0\u853d\u3057\u3064\u3064\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u30d5\u30a1\u30af\u30c8\u30ea\u3092\u63d0\u4f9b\nnamespace {\n    class DefaultConnectionFactory : public IConnectionFactory {\n    public:\n        Connection* createConnection() override {\n            return new TCPConnection();\n        }\n    };\n}\n\nIConnectionFactory* g_connectionFactory = new DefaultConnectionFactory();<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-40\">2. \u30b5\u30fc\u30d3\u30b9\u30ed\u30b1\u30fc\u30bf\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5<\/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=\"\">\/\/ service_locator.h\nclass ServiceLocator {\npublic:\n    static Logger&amp; getLogger();\n    static Config&amp; getConfig();\n    static Database&amp; getDatabase();\n\nprivate:\n    static Logger* logger;\n    static Config* config;\n    static Database* database;\n};\n\n\/\/ service_locator.cpp\nLogger* ServiceLocator::logger = nullptr;\nConfig* ServiceLocator::config = nullptr;\nDatabase* ServiceLocator::database = nullptr;\n\n\/\/ \u521d\u671f\u5316\u7528\u306e\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\nnamespace {\n    struct ServiceInitializer {\n        ServiceInitializer() {\n            ServiceLocator::logger = new FileLogger();\n            ServiceLocator::config = new XMLConfig();\n            ServiceLocator::database = new PostgresDatabase();\n        }\n\n        ~ServiceInitializer() {\n            delete ServiceLocator::logger;\n            delete ServiceLocator::config;\n            delete ServiceLocator::database;\n        }\n    };\n\n    static ServiceInitializer initializer;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-41\">\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308bextern \u306e\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-42\">1. \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306e\u4ee3\u66ff\u3068\u3057\u3066\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=\"\">\/\/ system_monitor.h\nnamespace SystemMonitor {\n    struct Statistics {\n        std::atomic&lt;int64_t&gt; total_requests{0};\n        std::atomic&lt;int64_t&gt; failed_requests{0};\n        std::atomic&lt;double&gt; average_response_time{0.0};\n    };\n\n    extern Statistics current_stats;\n\n    void updateStats(bool success, double response_time);\n    Statistics getSnapshot();\n}\n\n\/\/ system_monitor.cpp\nnamespace SystemMonitor {\n    Statistics current_stats;\n\n    void updateStats(bool success, double response_time) {\n        current_stats.total_requests++;\n        if (!success) current_stats.failed_requests++;\n\n        \/\/ \u79fb\u52d5\u5e73\u5747\u306e\u8a08\u7b97\n        double old_avg = current_stats.average_response_time;\n        double count = current_stats.total_requests;\n        current_stats.average_response_time = old_avg * (count - 1) \/ count + response_time \/ count;\n    }\n\n    Statistics getSnapshot() {\n        return current_stats;  \/\/ atomic\u5909\u6570\u306a\u306e\u3067\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306f\u5b89\u5168\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-43\">2. \u8a2d\u5b9a\u7ba1\u7406\u306e\u6700\u9069\u5316<\/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=\"\">\/\/ app_config.h\nnamespace AppConfig {\n    struct RuntimeConfig {\n        int thread_pool_size;\n        std::string log_level;\n        bool debug_mode;\n    };\n\n    extern std::atomic&lt;RuntimeConfig*&gt; current_config;\n\n    \/\/ \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u8a2d\u5b9a\u306e\u66f4\u65b0\n    void updateConfig(const RuntimeConfig&amp; new_config);\n    \/\/ \u73fe\u5728\u306e\u8a2d\u5b9a\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3092\u53d6\u5f97\n    RuntimeConfig getConfig();\n}\n\n\/\/ app_config.cpp\nnamespace AppConfig {\n    std::atomic&lt;RuntimeConfig*&gt; current_config{new RuntimeConfig{\n        8,              \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u30b5\u30a4\u30ba\n        \"INFO\",         \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30ed\u30b0\u30ec\u30d9\u30eb\n        false          \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30c7\u30d0\u30c3\u30b0\u30e2\u30fc\u30c9\n    }};\n\n    void updateConfig(const RuntimeConfig&amp; new_config) {\n        RuntimeConfig* old_config = current_config.load();\n        RuntimeConfig* new_config_ptr = new RuntimeConfig(new_config);\n\n        if (current_config.compare_exchange_strong(old_config, new_config_ptr)) {\n            delete old_config;  \/\/ \u53e4\u3044\u8a2d\u5b9a\u306e\u89e3\u653e\n        } else {\n            delete new_config_ptr;  \/\/ \u66f4\u65b0\u306b\u5931\u6557\u3057\u305f\u5834\u5408\n        }\n    }\n\n    RuntimeConfig getConfig() {\n        return *current_config.load();\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-44\">3. \u30e2\u30b8\u30e5\u30fc\u30eb\u521d\u671f\u5316\u306e\u5236\u5fa1<\/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=\"\">\/\/ module_manager.h\nnamespace ModuleManager {\n    struct ModuleState {\n        bool initialized;\n        std::string status;\n        std::chrono::system_clock::time_point last_update;\n    };\n\n    extern std::map&lt;std::string, ModuleState&gt; module_states;\n    extern std::mutex states_mutex;\n\n    bool initializeModule(const std::string&amp; module_name);\n    bool isModuleInitialized(const std::string&amp; module_name);\n}\n\n\/\/ module_manager.cpp\nnamespace ModuleManager {\n    std::map&lt;std::string, ModuleState&gt; module_states;\n    std::mutex states_mutex;\n\n    bool initializeModule(const std::string&amp; module_name) {\n        std::lock_guard&lt;std::mutex&gt; lock(states_mutex);\n        auto&amp; state = module_states[module_name];\n\n        if (state.initialized) return true;\n\n        try {\n            \/\/ \u30e2\u30b8\u30e5\u30fc\u30eb\u56fa\u6709\u306e\u521d\u671f\u5316\u30ed\u30b8\u30c3\u30af\n            \/\/ ...\n\n            state.initialized = true;\n            state.status = \"OK\";\n            state.last_update = std::chrono::system_clock::now();\n            return true;\n        } catch (const std::exception&amp; e) {\n            state.status = std::string(\"Error: \") + e.what();\n            return false;\n        }\n    }\n\n    bool isModuleInitialized(const std::string&amp; module_name) {\n        std::lock_guard&lt;std::mutex&gt; lock(states_mutex);\n        auto it = module_states.find(module_name);\n        return it != module_states.end() &amp;&amp; it-&gt;second.initialized;\n    }\n}<\/pre>\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\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u5b9f\u88c5\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u30c6\u30a3\u306e\u78ba\u4fdd<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5171\u6709\u30ea\u30bd\u30fc\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306f\u9069\u5207\u306b\u540c\u671f\u3059\u308b<\/li>\n\n\n\n<li>atomic\u3084mutex\u3092\u4f7f\u7528\u3057\u3066\u7af6\u5408\u3092\u9632\u3050<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u9806\u5e8f\u306e\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u660e\u78ba\u306b\u3059\u308b<\/li>\n\n\n\n<li>\u5faa\u74b0\u4f9d\u5b58\u3092\u907f\u3051\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u9632\u6b62<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ea\u30bd\u30fc\u30b9\u306e\u6240\u6709\u6a29\u3092\u660e\u78ba\u306b\u3059\u308b<\/li>\n\n\n\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3092\u6d3b\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u4e00\u8cab\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3059\u308b<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u72b6\u614b\u3092\u9069\u5207\u306b\u4f1d\u64ad\u3055\u305b\u308b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-45\">extern \u306e\u5fdc\u7528\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-46\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3068 extern \u306e\u4f75\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-47\">1. \u7279\u6b8a\u5316\u3055\u308c\u305f\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u5916\u90e8\u30ea\u30f3\u30b1\u30fc\u30b8<\/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=\"\">\/\/ specialized_container.h\ntemplate&lt;typename T&gt;\nclass SpecializedContainer {\n    static T* shared_instance;\npublic:\n    static T* getInstance();\n    static void resetInstance();\n};\n\n\/\/ \u7279\u5b9a\u306e\u578b\u306b\u5bfe\u3059\u308b\u7279\u6b8a\u5316\u3092\u5ba3\u8a00\nextern template class SpecializedContainer&lt;int&gt;;\nextern template class SpecializedContainer&lt;std::string&gt;;\n\n\/\/ specialized_container.cpp\ntemplate&lt;typename T&gt;\nT* SpecializedContainer&lt;T&gt;::shared_instance = nullptr;\n\ntemplate&lt;typename T&gt;\nT* SpecializedContainer&lt;T&gt;::getInstance() {\n    if (!shared_instance) {\n        shared_instance = new T();\n    }\n    return shared_instance;\n}\n\ntemplate&lt;typename T&gt;\nvoid SpecializedContainer&lt;T&gt;::resetInstance() {\n    delete shared_instance;\n    shared_instance = nullptr;\n}\n\n\/\/ \u660e\u793a\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\ntemplate class SpecializedContainer&lt;int&gt;;\ntemplate class SpecializedContainer&lt;std::string&gt;;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-48\">2. \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068\u306e\u7d71\u5408<\/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=\"\">\/\/ type_registry.h\ntemplate&lt;typename T&gt;\nstruct TypeInfo {\n    static const char* name;\n    static const size_t size;\n};\n\n\/\/ \u578b\u60c5\u5831\u306e\u5916\u90e8\u30ea\u30f3\u30b1\u30fc\u30b8\u5ba3\u8a00\nextern template struct TypeInfo&lt;int&gt;;\nextern template struct TypeInfo&lt;double&gt;;\nextern template struct TypeInfo&lt;std::string&gt;;\n\n\/\/ type_registry.cpp\ntemplate&lt;typename T&gt;\nconst char* TypeInfo&lt;T&gt;::name = \"unknown\";\n\ntemplate&lt;typename T&gt;\nconst size_t TypeInfo&lt;T&gt;::size = sizeof(T);\n\n\/\/ \u7279\u6b8a\u5316\u306e\u5b9a\u7fa9\ntemplate&lt;&gt;\nconst char* TypeInfo&lt;int&gt;::name = \"int\";\n\ntemplate&lt;&gt;\nconst char* TypeInfo&lt;double&gt;::name = \"double\";\n\ntemplate&lt;&gt;\nconst char* TypeInfo&lt;std::string&gt;::name = \"string\";\n\n\/\/ \u660e\u793a\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\ntemplate struct TypeInfo&lt;int&gt;;\ntemplate struct TypeInfo&lt;double&gt;;\ntemplate struct TypeInfo&lt;std::string&gt;;<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-49\">DLL \u3067 extern \u3092\u4f7f\u3046\u969b\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-50\">1. DLL\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\/\u30a4\u30f3\u30dd\u30fc\u30c8\u306e\u7ba1\u7406<\/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=\"\">\/\/ dll_defines.h\n#ifdef _WIN32\n    #ifdef BUILDING_DLL\n        #define DLL_EXPORT __declspec(dllexport)\n    #else\n        #define DLL_EXPORT __declspec(dllimport)\n    #endif\n#else\n    #define DLL_EXPORT\n#endif\n\n\/\/ shared_data.h\nextern DLL_EXPORT int global_counter;\nextern DLL_EXPORT const char* version_string;\n\nclass DLL_EXPORT SharedResource {\npublic:\n    static void initialize();\n    static void cleanup();\nprivate:\n    static int* resource_handle;\n};\n\n\/\/ shared_data.cpp\n#define BUILDING_DLL\n#include \"shared_data.h\"\n\nint global_counter = 0;\nconst char* version_string = \"1.0.0\";\nint* SharedResource::resource_handle = nullptr;<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-51\">2. \u30d7\u30e9\u30b0\u30a4\u30f3\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u6d3b\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=\"\">\/\/ plugin_interface.h\nstruct PluginInfo {\n    const char* name;\n    const char* version;\n    void (*initialize)();\n    void (*cleanup)();\n};\n\n#ifdef _WIN32\n    #define PLUGIN_EXPORT extern \"C\" __declspec(dllexport)\n#else\n    #define PLUGIN_EXPORT extern \"C\"\n#endif\n\n\/\/ \u5404\u30d7\u30e9\u30b0\u30a4\u30f3\u3067\u5b9f\u88c5\u5fc5\u8981\u306a\u95a2\u6570\nPLUGIN_EXPORT const PluginInfo* getPluginInfo();\n\n\/\/ example_plugin.cpp\n#include \"plugin_interface.h\"\n\nnamespace {\n    void pluginInitialize() {\n        \/\/ \u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u521d\u671f\u5316\u51e6\u7406\n    }\n\n    void pluginCleanup() {\n        \/\/ \u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u51e6\u7406\n    }\n\n    const PluginInfo plugin_info = {\n        \"ExamplePlugin\",\n        \"1.0.0\",\n        pluginInitialize,\n        pluginCleanup\n    };\n}\n\nPLUGIN_EXPORT const PluginInfo* getPluginInfo() {\n    return &amp;plugin_info;\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-52\">3. \u30af\u30ed\u30b9\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u5bfe\u5fdc<\/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=\"\">\/\/ platform_specific.h\n#if defined(_WIN32)\n    #define PLATFORM_SPECIFIC extern __declspec(dllimport)\n#elif defined(__linux__)\n    #define PLATFORM_SPECIFIC extern\n#else\n    #define PLATFORM_SPECIFIC extern\n#endif\n\nnamespace PlatformUtils {\n    PLATFORM_SPECIFIC void (*logger)(const char* message);\n    PLATFORM_SPECIFIC int (*getSystemInfo)();\n\n    \/\/ \u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u56fa\u6709\u306e\u521d\u671f\u5316\n    bool initializePlatform();\n}\n\n\/\/ windows_platform.cpp\n#ifdef _WIN32\n#define BUILDING_PLATFORM_DLL\n#include \"platform_specific.h\"\n\nnamespace {\n    void windowsLogger(const char* message) {\n        \/\/ Windows\u56fa\u6709\u306e\u30ed\u30b0\u51e6\u7406\n    }\n\n    int getWindowsSystemInfo() {\n        \/\/ Windows\u56fa\u6709\u306e\u30b7\u30b9\u30c6\u30e0\u60c5\u5831\u53d6\u5f97\n        return 0;\n    }\n}\n\nnamespace PlatformUtils {\n    void (*logger)(const char* message) = windowsLogger;\n    int (*getSystemInfo)() = getWindowsSystemInfo;\n}\n#endif<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-53\">\u5b9f\u88c5\u4e0a\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>DLL\u30d0\u30fc\u30b8\u30e7\u30cb\u30f3\u30b0\u306e\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=\"\">   \/\/ version_info.h\n   struct VersionInfo {\n       int major;\n       int minor;\n       int patch;\n       const char* build_id;\n   };\n\n   extern DLL_EXPORT const VersionInfo CURRENT_VERSION;<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u51e6\u7406\u306e\u8003\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   \/\/ dll_exception_handling.h\n   extern DLL_EXPORT void (*error_handler)(const char* message);\n\n   \/\/ \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30e9\u306e\u8a2d\u5b9a\n   void setErrorHandler(void (*handler)(const char* message));<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u30c6\u30a3\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=\"\">   \/\/ thread_safe_dll.h\n   namespace ThreadSafe {\n       extern DLL_EXPORT std::mutex global_mutex;\n       extern DLL_EXPORT std::atomic&lt;int&gt; operation_count;\n   }<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5fdc\u7528\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-54\">extern \u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u4f7f\u3044\u5206\u3051<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-55\">\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3068\u306e\u6bd4\u8f03<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-56\">1. \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\u4f8b<\/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=\"\">\/\/ singleton.h\nclass ConfigManager {\npublic:\n    static ConfigManager&amp; getInstance() {\n        static ConfigManager instance;  \/\/ C++11\u4ee5\u964d\u3067\u306f\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\n        return instance;\n    }\n\n    void setConfig(const std::string&amp; key, const std::string&amp; value);\n    std::string getConfig(const std::string&amp; key) const;\n\n    \/\/ \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306e\u30b3\u30d4\u30fc\u3092\u9632\u6b62\n    ConfigManager(const ConfigManager&amp;) = delete;\n    ConfigManager&amp; operator=(const ConfigManager&amp;) = delete;\n\nprivate:\n    ConfigManager() = default;  \/\/ \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    std::map&lt;std::string, std::string&gt; config_map;\n    mutable std::mutex mutex;\n};\n\n\/\/ singleton.cpp\nvoid ConfigManager::setConfig(const std::string&amp; key, const std::string&amp; value) {\n    std::lock_guard&lt;std::mutex&gt; lock(mutex);\n    config_map[key] = value;\n}\n\nstd::string ConfigManager::getConfig(const std::string&amp; key) const {\n    std::lock_guard&lt;std::mutex&gt; lock(mutex);\n    auto it = config_map.find(key);\n    return it != config_map.end() ? it-&gt;second : \"\";\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-57\">2. extern\u3068\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306e\u6bd4\u8f03<\/h4>\n\n\n<div id=\"id-ea845b4f-4891-4241-842e-2edb0c3856a5\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u5fb4<\/th><th>extern<\/th><th>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3<\/th><\/tr><\/thead><tbody><tr><td>\u521d\u671f\u5316\u30bf\u30a4\u30df\u30f3\u30b0<\/td><td>\u30d7\u30ed\u30b0\u30e9\u30e0\u8d77\u52d5\u6642<\/td><td>\u521d\u56de\u30a2\u30af\u30bb\u30b9\u6642\uff08\u9045\u5ef6\u521d\u671f\u5316\uff09<\/td><\/tr><tr><td>\u30ab\u30d7\u30bb\u30eb\u5316<\/td><td>\u4f4e\u3044<\/td><td>\u9ad8\u3044<\/td><\/tr><tr><td>\u30c6\u30b9\u30c8\u5bb9\u6613\u6027<\/td><td>\u96e3\u3057\u3044<\/td><td>\u30e2\u30c3\u30af\u5316\u304c\u53ef\u80fd<\/td><\/tr><tr><td>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u30c6\u30a3<\/td><td>\u660e\u793a\u7684\u306a\u5b9f\u88c5\u304c\u5fc5\u8981<\/td><td>\u8a00\u8a9e\u4ed5\u69d8\u3067\u4fdd\u8a3c\uff08C++11\u4ee5\u964d\uff09<\/td><\/tr><tr><td>\u30e1\u30e2\u30ea\u7ba1\u7406<\/td><td>\u624b\u52d5<\/td><td>\u81ea\u52d5<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-58\">\u9759\u7684\u306a\u5909\u6570\u3068\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-59\">1. \u9759\u7684\u30e1\u30f3\u30d0\u5909\u6570\u306e\u6d3b\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=\"\">\/\/ static_members.h\nclass Logger {\npublic:\n    static void setLogLevel(int level);\n    static void log(const std::string&amp; message);\n\nprivate:\n    static int current_log_level;\n    static std::ofstream log_file;\n    static std::mutex log_mutex;\n};\n\n\/\/ static_members.cpp\nint Logger::current_log_level = 0;\nstd::ofstream Logger::log_file(\"app.log\");\nstd::mutex Logger::log_mutex;\n\nvoid Logger::setLogLevel(int level) {\n    std::lock_guard&lt;std::mutex&gt; lock(log_mutex);\n    current_log_level = level;\n}\n\nvoid Logger::log(const std::string&amp; message) {\n    std::lock_guard&lt;std::mutex&gt; lock(log_mutex);\n    if (log_file.is_open()) {\n        log_file &lt;&lt; message &lt;&lt; std::endl;\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-60\">2. \u540d\u524d\u7a7a\u9593\u30b9\u30b3\u30fc\u30d7\u306e\u9759\u7684\u5909\u6570<\/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=\"\">\/\/ namespace_statics.h\nnamespace ApplicationState {\n    namespace {\n        \/\/ \u30d5\u30a1\u30a4\u30eb\u30b9\u30b3\u30fc\u30d7\u306e\u9759\u7684\u5909\u6570\n        std::atomic&lt;bool&gt; is_initialized{false};\n        std::mutex initialization_mutex;\n    }\n\n    bool initialize() {\n        std::lock_guard&lt;std::mutex&gt; lock(initialization_mutex);\n        if (is_initialized) return true;\n\n        \/\/ \u521d\u671f\u5316\u51e6\u7406\n        is_initialized = true;\n        return true;\n    }\n\n    bool isInitialized() {\n        return is_initialized;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-61\">\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u306e\u9078\u629e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>extern\u3092\u4f7f\u7528\u3059\u3079\u304d\u5834\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u5358\u4f4d\u3067\u540c\u3058\u5909\u6570\u3092\u5171\u6709\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/li>\n\n\n\n<li>DLL\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u63d0\u4f9b\u3059\u308b<\/li>\n\n\n\n<li>\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u3068\u306e\u4e92\u63db\u6027\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u3092\u4f7f\u7528\u3059\u3079\u304d\u5834\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u30ab\u30d7\u30bb\u30eb\u5316\u304c\u91cd\u8981<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u53ef\u80fd\u6027\u3092\u78ba\u4fdd\u3057\u305f\u3044<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u5b9f\u88c5\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9759\u7684\u30e1\u30f3\u30d0\u3092\u4f7f\u7528\u3059\u3079\u304d\u5834\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30af\u30e9\u30b9\u30b9\u30b3\u30fc\u30d7\u3067\u306e\u72b6\u614b\u7ba1\u7406<\/li>\n\n\n\n<li>\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570\u306e\u63d0\u4f9b<\/li>\n\n\n\n<li>\u5b9a\u6570\u5024\u306e\u5171\u6709<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-62\">\u5b9f\u88c5\u4f8b\uff1a\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u30a2\u30d7\u30ed\u30fc\u30c1<\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ hybrid_approach.h\nclass SystemManager {\npublic:\n    \/\/ \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\n    static SystemManager&amp; getInstance();\n\n    \/\/ \u9759\u7684\u30e1\u30f3\u30d0\n    static bool isInitialized();\n\n    \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\n    void configure(const std::string&amp; config);\n\nprivate:\n    SystemManager() = default;\n\n    \/\/ extern\u3067\u5171\u6709\u3055\u308c\u308b\u72b6\u614b\n    static bool initialized;\n    static std::string system_id;\n\n    \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\n    std::map&lt;std::string, std::string&gt; configuration;\n    std::mutex config_mutex;\n};\n\n\/\/ hybrid_approach.cpp\nbool SystemManager::initialized = false;\nstd::string SystemManager::system_id = \"default\";\n\nSystemManager&amp; SystemManager::getInstance() {\n    static SystemManager instance;\n    return instance;\n}\n\nbool SystemManager::isInitialized() {\n    return initialized;\n}\n\nvoid SystemManager::configure(const std::string&amp; config) {\n    std::lock_guard&lt;std::mutex&gt; lock(config_mutex);\n    \/\/ \u8a2d\u5b9a\u51e6\u7406\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-63\">\u9078\u629e\u57fa\u6e96\u306e\u307e\u3068\u3081<\/h3>\n\n\n<div id=\"id-e07bf9b3-d5aa-4c23-b8fb-34e9933cbcce\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u8981\u4ef6<\/th><th>\u63a8\u5968\u30a2\u30d7\u30ed\u30fc\u30c1<\/th><th>\u7406\u7531<\/th><\/tr><\/thead><tbody><tr><td>\u30b0\u30ed\u30fc\u30d0\u30eb\u72b6\u614b\u306e\u5171\u6709<\/td><td>extern<\/td><td>\u30b7\u30f3\u30d7\u30eb\u3067\u76f4\u63a5\u7684<\/td><\/tr><tr><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08<\/td><td>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3<\/td><td>\u30ab\u30d7\u30bb\u30eb\u5316\u3068\u5236\u5fa1\u304c\u53ef\u80fd<\/td><\/tr><tr><td>\u30b9\u30b3\u30fc\u30d7\u9650\u5b9a\u306e\u5171\u6709<\/td><td>\u9759\u7684\u30e1\u30f3\u30d0<\/td><td>\u9069\u5207\u306a\u7bc4\u56f2\u5236\u9650\u304c\u53ef\u80fd<\/td><\/tr><tr><td>DLL\/\u5171\u6709\u30e9\u30a4\u30d6\u30e9\u30ea<\/td><td>extern<\/td><td>\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u6a19\u6e96\u306e\u65b9\u6cd5<\/td><\/tr><tr><td>\u30c6\u30b9\u30c8\u5bb9\u6613\u6027\u91cd\u8996<\/td><td>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\/\u9759\u7684\u30e1\u30f3\u30d0<\/td><td>\u30e2\u30c3\u30af\u5316\u304c\u5bb9\u6613<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u9078\u629e\u80a2\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u6700\u9069\u306a\u8a2d\u8a08\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u3001\u5404\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u9577\u6240\u3068\u77ed\u6240\u3092\u7406\u89e3\u3057\u3001\u4f7f\u7528context \u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":{"0":"post-1857","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-cpp","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1857"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1857\/revisions"}],"predecessor-version":[{"id":1858,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1857\/revisions\/1858"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}