{"id":45030,"date":"2025-06-22T02:22:50","date_gmt":"2025-06-21T18:22:50","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/45030.html"},"modified":"2025-06-22T02:22:50","modified_gmt":"2025-06-21T18:22:50","slug":"%e3%80%90c%e3%80%91%e7%ae%80%e5%8d%95%e5%b7%a5%e5%8e%82%e6%a8%a1%e5%bc%8f-%e5%b7%a5%e5%8e%82%e6%96%b9%e6%b3%95%e6%a8%a1%e5%bc%8f-%e6%8a%bd%e8%b1%a1%e5%b7%a5%e5%8e%82%e6%a8%a1%e5%bc%8f%e5%af%b9","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/45030.html","title":{"rendered":"\u3010C++\u3011\u7b80\u5355\u5de5\u5382\u6a21\u5f0f\/\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\/\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\u5bf9\u6bd4"},"content":{"rendered":"<\/p>\n<h4>\u76ee\u5f55<\/h4>\n<ul>\n<li>\u4e00\u3001\u7b80\u5355\u5de5\u5382\u6a21\u5f0f&#xff08;Simple Factory Pattern&#xff09;<\/li>\n<li>\u4e8c\u3001\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f&#xff08;Factory Method Pattern&#xff09;<\/li>\n<li>\u4e09\u3001\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f&#xff08;Abstract Factory Pattern&#xff09;<\/li>\n<li>\u56db\u3001\u4e09\u8005\u5bf9\u6bd4\u603b\u7ed3<\/li>\n<li>\u4e94\u3001\u9009\u62e9\u5efa\u8bae<\/li>\n<li>\n<ul>\n<li>\u5982\u679c\u8fd9\u7bc7\u6587\u7ae0\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9&#xff0c;\u6e34\u671b\u83b7\u5f97\u4f60\u7684\u4e00\u4e2a\u70b9\u8d5e&#xff01;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\u3001\u7b80\u5355\u5de5\u5382\u6a21\u5f0f\u548c\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u90fd\u662f\u521b\u5efa\u578b\u8bbe\u8ba1\u6a21\u5f0f&#xff0c;\u5b83\u4eec\u7684\u6838\u5fc3\u76ee\u7684\u90fd\u662f\u5c06\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u4f7f\u7528\u5206\u79bb&#xff0c;\u4f46\u5728\u5b9e\u73b0\u590d\u6742\u5ea6\u3001\u7075\u6d3b\u6027\u548c\u5e94\u7528\u573a\u666f\u4e0a\u5b58\u5728\u663e\u8457\u5dee\u5f02\u3002\u4ee5\u4e0b\u4ece\u5b9a\u4e49\u3001\u7ed3\u6784\u3001\u9002\u7528\u573a\u666f\u548c\u4ee3\u7801\u793a\u4f8b\u56db\u4e2a\u65b9\u9762\u8fdb\u884c\u5bf9\u6bd4\u5206\u6790&#xff1a;<\/p>\n<h2>\u4e00\u3001\u7b80\u5355\u5de5\u5382\u6a21\u5f0f&#xff08;Simple Factory Pattern&#xff09;<\/h2>\n<p>\u5b9a\u4e49\u4e0e\u7ed3\u6784<\/p>\n<ul>\n<li>\u5b9a\u4e49&#xff1a;\u7b80\u5355\u5de5\u5382\u6a21\u5f0f\u662f\u4e00\u79cd\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u5f0f&#xff0c;\u5b83\u5c06\u5bf9\u8c61\u7684\u521b\u5efa\u903b\u8f91\u5c01\u88c5\u5728\u4e00\u4e2a\u5de5\u5382\u7c7b\u4e2d&#xff0c;\u901a\u8fc7\u4f20\u5165\u53c2\u6570\u51b3\u5b9a\u521b\u5efa\u54ea\u79cd\u4ea7\u54c1\u3002<\/li>\n<li>\u6838\u5fc3\u89d2\u8272&#xff1a;\n<ul>\n<li>\u5de5\u5382\u7c7b&#xff08;Factory&#xff09;&#xff1a;\u8d1f\u8d23\u521b\u5efa\u4ea7\u54c1\u7684\u9759\u6001\u65b9\u6cd5\u3002<\/li>\n<li>\u62bd\u8c61\u4ea7\u54c1&#xff08;Product&#xff09;&#xff1a;\u5b9a\u4e49\u4ea7\u54c1\u7684\u63a5\u53e3\u3002<\/li>\n<li>\u5177\u4f53\u4ea7\u54c1&#xff08;ConcreteProduct&#xff09;&#xff1a;\u5b9e\u73b0\u62bd\u8c61\u4ea7\u54c1\u63a5\u53e3\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u9002\u7528\u573a\u666f<\/p>\n<ul>\n<li>\u4ea7\u54c1\u79cd\u7c7b\u8f83\u5c11\u4e14\u521b\u5efa\u903b\u8f91\u7b80\u5355\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u53ea\u9700\u901a\u8fc7\u53c2\u6570\u6307\u5b9a\u9700\u8981\u521b\u5efa\u7684\u4ea7\u54c1&#xff0c;\u4e0d\u5173\u5fc3\u521b\u5efa\u7ec6\u8282\u3002<\/li>\n<\/ul>\n<p>\u4ee3\u7801\u793a\u4f8b<\/p>\n<p><span class=\"token comment\">\/\/ \u62bd\u8c61\u4ea7\u54c1<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Shape<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">draw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">Shape<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u4ea7\u54c1<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Circle<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Shape<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">draw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Circle::draw()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Rectangle<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Shape<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">draw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Rectangle::draw()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u7b80\u5355\u5de5\u5382<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ShapeFactory<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">static<\/span> std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>Shape<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createShape<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string<span class=\"token operator\">&amp;<\/span> type<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>type <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#034;circle&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">make_unique<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>Circle<span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>type <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#034;rectangle&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">make_unique<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>Rectangle<span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u9519\u8bef\u5904\u7406<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5ba2\u6237\u7aef\u4f7f\u7528<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">client<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> circle <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">ShapeFactory<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">createShape<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;circle&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    circle<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">draw<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: Circle::draw()<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u7279\u70b9<\/p>\n<ul>\n<li>\u4f18\u70b9&#xff1a;\u5b9e\u73b0\u7b80\u5355&#xff0c;\u5c06\u5bf9\u8c61\u521b\u5efa\u96c6\u4e2d\u7ba1\u7406\u3002<\/li>\n<li>\u7f3a\u70b9&#xff1a;\u5de5\u5382\u7c7b\u804c\u8d23\u8fc7\u91cd&#xff0c;\u65b0\u589e\u4ea7\u54c1\u9700\u4fee\u6539\u5de5\u5382\u7c7b&#xff0c;\u8fdd\u53cd\u5f00\u95ed\u539f\u5219\u3002<\/li>\n<\/ul>\n<h2>\u4e8c\u3001\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f&#xff08;Factory Method Pattern&#xff09;<\/h2>\n<p>\u5b9a\u4e49\u4e0e\u7ed3\u6784<\/p>\n<ul>\n<li>\u5b9a\u4e49&#xff1a;\u5de5\u5382\u65b9\u6cd5\u6a21\u5f0f\u5b9a\u4e49\u521b\u5efa\u5bf9\u8c61\u7684\u63a5\u53e3&#xff0c;\u8ba9\u5b50\u7c7b\u51b3\u5b9a\u5b9e\u4f8b\u5316\u54ea\u4e2a\u7c7b\u3002\u5de5\u5382\u65b9\u6cd5\u5c06\u4ea7\u54c1\u7684\u521b\u5efa\u5ef6\u8fdf\u5230\u5b50\u7c7b\u3002<\/li>\n<li>\u6838\u5fc3\u89d2\u8272&#xff1a;\n<ul>\n<li>\u62bd\u8c61\u5de5\u5382&#xff08;AbstractFactory&#xff09;&#xff1a;\u58f0\u660e\u5de5\u5382\u65b9\u6cd5&#xff0c;\u8fd4\u56de\u62bd\u8c61\u4ea7\u54c1\u3002<\/li>\n<li>\u5177\u4f53\u5de5\u5382&#xff08;ConcreteFactory&#xff09;&#xff1a;\u5b9e\u73b0\u5de5\u5382\u65b9\u6cd5&#xff0c;\u521b\u5efa\u5177\u4f53\u4ea7\u54c1\u3002<\/li>\n<li>\u62bd\u8c61\u4ea7\u54c1&#xff08;Product&#xff09;&#xff1a;\u5b9a\u4e49\u4ea7\u54c1\u7684\u63a5\u53e3\u3002<\/li>\n<li>\u5177\u4f53\u4ea7\u54c1&#xff08;ConcreteProduct&#xff09;&#xff1a;\u5b9e\u73b0\u62bd\u8c61\u4ea7\u54c1\u63a5\u53e3\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u9002\u7528\u573a\u666f<\/p>\n<ul>\n<li>\u5f53\u4e00\u4e2a\u7c7b\u4e0d\u77e5\u9053\u5b83\u6240\u9700\u8981\u7684\u5bf9\u8c61\u7684\u7c7b\u65f6&#xff08;\u5982\u6846\u67b6\u8bbe\u8ba1&#xff09;\u3002<\/li>\n<li>\u5f53\u4e00\u4e2a\u7c7b\u5e0c\u671b\u7531\u5176\u5b50\u7c7b\u6765\u6307\u5b9a\u521b\u5efa\u5bf9\u8c61\u65f6\u3002<\/li>\n<li>\u5f53\u7c7b\u5c06\u521b\u5efa\u5bf9\u8c61\u7684\u804c\u8d23\u59d4\u6258\u7ed9\u591a\u4e2a\u5b50\u7c7b\u4e2d\u7684\u67d0\u4e00\u4e2a&#xff0c;\u5e76\u4e14\u5e0c\u671b\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u6307\u5b9a\u65f6\u3002<\/li>\n<\/ul>\n<p>\u4ee3\u7801\u793a\u4f8b<\/p>\n<p><span class=\"token comment\">\/\/ \u62bd\u8c61\u4ea7\u54c1<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Product<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">operation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">Product<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u4ea7\u54c1<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ConcreteProductA<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Product<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">operation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;ConcreteProductA::operation()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ConcreteProductB<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Product<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">operation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;ConcreteProductB::operation()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u62bd\u8c61\u5de5\u5382<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Factory<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>Product<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProduct<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">Factory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u5de5\u5382<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ConcreteFactoryA<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Factory<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>Product<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProduct<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">make_unique<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>ConcreteProductA<span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ConcreteFactoryB<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Factory<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>Product<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProduct<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">make_unique<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>ConcreteProductB<span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5ba2\u6237\u7aef\u4f7f\u7528<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">client<\/span><span class=\"token punctuation\">(<\/span>Factory<span class=\"token operator\">&amp;<\/span> factory<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> product <span class=\"token operator\">&#061;<\/span> factory<span class=\"token punctuation\">.<\/span><span class=\"token function\">createProduct<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    product<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">operation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528\u793a\u4f8b<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    ConcreteFactoryA factoryA<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">client<\/span><span class=\"token punctuation\">(<\/span>factoryA<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: ConcreteProductA::operation()<\/span><\/p>\n<p>    ConcreteFactoryB factoryB<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">client<\/span><span class=\"token punctuation\">(<\/span>factoryB<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: ConcreteProductB::operation()<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u7279\u70b9<\/p>\n<ul>\n<li>\u4f18\u70b9&#xff1a;\u7b26\u5408\u5f00\u95ed\u539f\u5219&#xff0c;\u65b0\u589e\u4ea7\u54c1\u53ea\u9700\u6dfb\u52a0\u65b0\u7684\u5177\u4f53\u5de5\u5382&#xff0c;\u65e0\u9700\u4fee\u6539\u62bd\u8c61\u5de5\u5382\u548c\u5ba2\u6237\u7aef\u3002<\/li>\n<li>\u7f3a\u70b9&#xff1a;\u5de5\u5382\u5b50\u7c7b\u8fc7\u591a\u65f6\u4f1a\u5bfc\u81f4\u4ee3\u7801\u590d\u6742\u5ea6\u589e\u52a0\u3002<\/li>\n<\/ul>\n<h2>\u4e09\u3001\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f&#xff08;Abstract Factory Pattern&#xff09;<\/h2>\n<p>\u5b9a\u4e49\u4e0e\u7ed3\u6784<\/p>\n<ul>\n<li>\u5b9a\u4e49&#xff1a;\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\u63d0\u4f9b\u4e00\u4e2a\u521b\u5efa\u4e00\u7cfb\u5217\u76f8\u5173\u6216\u76f8\u4e92\u4f9d\u8d56\u5bf9\u8c61\u7684\u63a5\u53e3&#xff0c;\u800c\u65e0\u9700\u6307\u5b9a\u5b83\u4eec\u5177\u4f53\u7684\u7c7b\u3002<\/li>\n<li>\u6838\u5fc3\u89d2\u8272&#xff1a;\n<ul>\n<li>\u62bd\u8c61\u5de5\u5382&#xff08;AbstractFactory&#xff09;&#xff1a;\u58f0\u660e\u521b\u5efa\u591a\u4e2a\u62bd\u8c61\u4ea7\u54c1\u7684\u65b9\u6cd5\u3002<\/li>\n<li>\u5177\u4f53\u5de5\u5382&#xff08;ConcreteFactory&#xff09;&#xff1a;\u5b9e\u73b0\u62bd\u8c61\u5de5\u5382\u7684\u65b9\u6cd5&#xff0c;\u521b\u5efa\u4e00\u7ec4\u5177\u4f53\u4ea7\u54c1\u3002<\/li>\n<li>\u62bd\u8c61\u4ea7\u54c1\u65cf&#xff08;AbstractProduct&#xff09;&#xff1a;\u5b9a\u4e49\u591a\u4e2a\u4ea7\u54c1\u7684\u63a5\u53e3\u3002<\/li>\n<li>\u5177\u4f53\u4ea7\u54c1&#xff08;ConcreteProduct&#xff09;&#xff1a;\u5b9e\u73b0\u62bd\u8c61\u4ea7\u54c1\u63a5\u53e3\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u9002\u7528\u573a\u666f<\/p>\n<ul>\n<li>\u7cfb\u7edf\u9700\u8981\u72ec\u7acb\u4e8e\u4ea7\u54c1\u7684\u521b\u5efa\u3001\u7ec4\u5408\u548c\u8868\u793a\u65f6\u3002<\/li>\n<li>\u7cfb\u7edf\u9700\u8981\u4f7f\u7528\u591a\u4e2a\u4ea7\u54c1\u65cf\u4e2d\u7684\u4e00\u4e2a&#xff0c;\u4e14\u4ea7\u54c1\u4e4b\u95f4\u6709\u4f9d\u8d56\u5173\u7cfb\u3002<\/li>\n<li>\u9700\u8981\u52a8\u6001\u5207\u6362\u4ea7\u54c1\u7cfb\u5217\u65f6&#xff08;\u5982\u8de8\u5e73\u53f0 UI\u3001\u4e3b\u9898\u7cfb\u7edf&#xff09;\u3002<\/li>\n<\/ul>\n<p>\u4ee3\u7801\u793a\u4f8b<\/p>\n<p><span class=\"token comment\">\/\/ \u62bd\u8c61\u4ea7\u54c1A<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AbstractProductA<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">operationA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">AbstractProductA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u4ea7\u54c1A1<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ProductA1<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">AbstractProductA<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">operationA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;ProductA1::operationA()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u4ea7\u54c1A2<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ProductA2<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">AbstractProductA<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">operationA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;ProductA2::operationA()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u62bd\u8c61\u4ea7\u54c1B<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AbstractProductB<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">operationB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">AbstractProductB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u4ea7\u54c1B1<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ProductB1<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">AbstractProductB<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">operationB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;ProductB1::operationB()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u4ea7\u54c1B2<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ProductB2<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">AbstractProductB<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">operationB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;ProductB2::operationB()&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u62bd\u8c61\u5de5\u5382<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AbstractFactory<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>AbstractProductA<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProductA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>AbstractProductB<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProductB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">virtual<\/span> <span class=\"token operator\">~<\/span><span class=\"token function\">AbstractFactory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u5de5\u53821<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ConcreteFactory1<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">AbstractFactory<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>AbstractProductA<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProductA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">make_unique<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>ProductA1<span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>AbstractProductB<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProductB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">make_unique<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>ProductB1<span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5177\u4f53\u5de5\u53822<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ConcreteFactory2<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">AbstractFactory<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>AbstractProductA<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProductA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">make_unique<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>ProductA2<span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    std<span class=\"token double-colon punctuation\">::<\/span>unique_ptr<span class=\"token operator\">&lt;<\/span>AbstractProductB<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">createProductB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">override<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">make_unique<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>ProductB2<span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5ba2\u6237\u7aef\u4f7f\u7528<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">client<\/span><span class=\"token punctuation\">(<\/span>AbstractFactory<span class=\"token operator\">&amp;<\/span> factory<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> productA <span class=\"token operator\">&#061;<\/span> factory<span class=\"token punctuation\">.<\/span><span class=\"token function\">createProductA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> productB <span class=\"token operator\">&#061;<\/span> factory<span class=\"token punctuation\">.<\/span><span class=\"token function\">createProductB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    productA<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">operationA<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    productB<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">operationB<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528\u793a\u4f8b<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    ConcreteFactory1 factory1<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">client<\/span><span class=\"token punctuation\">(<\/span>factory1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u8f93\u51fa: ProductA1::operationA() \u548c ProductB1::operationB()<\/span><\/p>\n<p>    ConcreteFactory2 factory2<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">client<\/span><span 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