{"id":635,"date":"2011-08-25T17:04:35","date_gmt":"2011-08-25T09:04:35","guid":{"rendered":"http:\/\/www.hawkwithwind.net\/blog\/?p=635"},"modified":"2011-08-25T17:10:08","modified_gmt":"2011-08-25T09:10:08","slug":"%e6%90%9e%e6%b8%85c%e8%99%9a%e7%bb%a7%e6%89%bf","status":"publish","type":"post","link":"https:\/\/www.hawkwithwind.net\/blog\/2011\/08\/25\/%e6%90%9e%e6%b8%85c%e8%99%9a%e7%bb%a7%e6%89%bf\/","title":{"rendered":"\u641e\u6e05C++\u865a\u7ee7\u627f"},"content":{"rendered":"<p>c++\u865a\u7ee7\u627f\u5e73\u65f6\u5f88\u5c11\u7528\u5230\uff0c\u770b\u4e66\u7684\u65f6\u5019\u4e5f\u5c31\u662f\u7406\u89e3\u4e2a\u5927\u6982\u3002<br \/>\n\u8fd9\u6b21\u5b9e\u8df5\u4e2d\u4f7f\u7528\u5230\u4e86\u865a\u7ee7\u627f\uff0c\u603b\u7b97\u6709\u4e86\u5177\u4f53\u7684\u5370\u8c61\u3002<\/p>\n<p>\u57fa\u7c7bthunk\u600e\u4e48\u5728\u5b50\u7c7b\u5bf9\u8c61\u91cc\u5806\u53e0\u7684\uff0c\u54b1\u5c31\u4e0d\u8d58\u8ff0\u4e86\uff0c\u53cd\u6b63\u7f51\u4e0a\u3001\u6559\u79d1\u4e66\u4e0a\u5230\u5904\u90fd\u6709\u8bb2\u3002\u8fd9\u6b21\u54b1\u81ea\u5df1\u9047\u5230\u7684\u95ee\u9898\u4e3b\u8981\u662f\u865a\u7ee7\u627f\u548c\u666e\u901a\u591a\u91cd\u7ee7\u627f\u6ca1\u641e\u6e05\u533a\u522b\u3002<\/p>\n<p>\u6211\u6709\u4e00\u5957\u865a\u63a5\u53e3hierarchy.<\/p>\n<pre><code class=\"cpp\">\r\nclass View {\r\n   virtual int ID() = 0;\r\n   virtual int Child() = 0;\r\n};\r\n\r\nclass TextView : public {\r\n   virtual const char* getText() = 0;\r\n};\r\n<\/code><\/pre>\n<p>\u6b64\u5904\u7701\u53bb\u4ee3\u7801\u6570\u767e\u884c\u3002\u3002\u3002<\/p>\n<p>\u4e4b\u540e\u5f53\u6211\u5f00\u59cb\u505a\u8fd9\u5957\u865a\u63a5\u53e3\u7684\u4e00\u7ec4\u5b9e\u73b0\u65f6\uff0c\u624d\u53d1\u73b0\u95ee\u9898\u3002<\/p>\n<pre><code class=\"cpp\">\r\nclass SysView : public View {\r\n    virtual int ID();\r\n    virtual int Child();\r\n};\r\n<\/code><\/pre>\n<p>\u5230\u8fd9\u91cc\u8fd8\u662f\u90fd\u6b63\u5e38\u7684\u3002<\/p>\n<pre><code class=\"cpp\">\r\nclass SysTextView : public SysView, public TextView\r\n{\r\n     virtual const char* getText();\r\n};\r\n<\/code><\/pre>\n<p>\u5f53\u5b9e\u73b0\u8fd9\u4e2a\u7c7b\u65f6\uff0c\u5c31\u4f1a\u53d1\u73b0\u5176\u5bf9\u8c61\u65e0\u6cd5\u5b9e\u4f8b\u5316\u3002\u56e0\u4e3aView\u4e0b\u9762\u7684\u865a\u63a5\u53e3\u6ca1\u6709\u5b9e\u73b0\u3002\u54a6\uff0c\u4e0d\u662f\u7ee7\u627f\u4e86SysView\u800cSysView\u5b9e\u73b0\u4e86View\u4e0b\u9762\u7684\u6240\u6709\u865a\u63a5\u53e3\u5417\uff1f\u95ee\u9898\u6ca1\u6709\u8fd9\u4e48\u7b80\u5355\u3002\u56e0\u4e3a\u8fd9\u4e2a\u662f\u591a\u91cd\u7ee7\u627f\uff0c\u6bcf\u4e2a\u7236\u7c7b\u90fd\u4f1a\u5728\u5b50\u7c7b\u4e2d\u4ea7\u751f\u4e00\u4e2a\u62f7\u8d1d\uff0c\u6240\u4ee5SysTextView\u91cc\u9762\u5c31\u51fa\u73b0\u4e86\u4e24\u4e2aView\u7c7b\u578b\u7684\u7236\u5bf9\u8c61\u3002\u4e00\u4e2a\u662fSysView\uff0c\u4e00\u4e2a\u662fTextView\u3002\u800cTextView\u6ca1\u6709\u5b9e\u73b0View\u7684\u865a\u63a5\u53e3\uff0c\u56e0\u6b64\u8fd9\u4e2a\u7c7b\u6574\u4e2a\u5c31\u90fd\u4e0d\u80fd\u5b9e\u4f8b\u5316\u4e86\u3002<\/p>\n<p>\u89e3\u51b3\u65b9\u6848\u5c31\u662f\u5fc5\u987b\u4f7f\u7528\u865a\u7ee7\u627f\uff0c\u8ba9\u7f16\u8bd1\u5668\u77e5\u9053\uff0cTextView\u7ee7\u627f\u7684\u90a3\u4e2aView\u548cSysView\u7ee7\u627f\u7684\u90a3\u4e2aView\uff0c\u662f\u540c\u4e00\u4e2aView\u3002\u5219\u9700\u8981\u4fee\u6539\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"cpp\">\r\nclass SysView: virtual public View {\r\n\/\/\/...\r\n};\r\n\r\nclass TextView : virtual public View {\r\n\/\/\/...\r\n};\r\n<\/code><\/pre>\n<p>\u6ce8\u610fSysTextView\u5e76\u4e0d\u9700\u8981\u5bf9\u5176\u4e24\u4e2a\u7236\u7c7b\u8fdb\u884c\u865a\u7ee7\u627f\uff0c\u9664\u975ehierarchy\u4e0b\u9762\u8fd8\u6709\u5bf9\u8fd9\u4e2a\u7c7b\u8fdb\u884c\u591a\u7ee7\u627f\u7684\u60c5\u51b5\u51fa\u73b0\u3002<\/p>\n<p>\u865a\u7ee7\u627f\u4f1a\u5f71\u54cd\u7cfb\u7edf\u6027\u80fd\uff0c\u5e94\u5c3d\u91cf\u907f\u514d\u3002\u8fd9\u91cc\u7528\u5230\u8fd9\u4e2a\u903b\u8f91\uff0c\u53ea\u662f\u4e3a\u4e86\u80fd\u591f\u4f7f\u7528\u5de5\u5382\u65b9\u6cd5\u8f83\u4e3a\u4f18\u7f8e\u5730\u521b\u5efa\u51fa\u5404\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u7136\u540e\u8c03\u7528\u5176\u865a\u63a5\u53e3\u5b8c\u6210\u64cd\u4f5c\u3002\u5e76\u4e0d\u662f\u6027\u80fd\u74f6\u9888\u3002\u545c\u957f\u4e45\u4ee5\u6765\u4e00\u4e2a\u77e5\u8bc6\u6f0f\u6d1e\u7ec8\u4e8e\u901a\u8fc7\u4e00\u6b21\u5b9e\u8df5\u8865\u4e0a\u4e86\u3002\u633a\u597d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>c++\u865a\u7ee7\u627f\u5e73\u65f6\u5f88\u5c11\u7528\u5230\uff0c\u770b\u4e66\u7684\u65f6\u5019\u4e5f\u5c31\u662f\u7406\u89e3\u4e2a\u5927\u6982\u3002 \u8fd9\u6b21\u5b9e\u8df5\u4e2d\u4f7f\u7528\u5230\u4e86\u865a\u7ee7\u627f\uff0c\u603b\u7b97\u6709\u4e86\u5177\u4f53\u7684\u5370\u8c61\u3002 \u57fa\u7c7bthunk\u600e\u4e48\u5728\u5b50\u7c7b\u5bf9\u8c61\u91cc\u5806\u53e0\u7684\uff0c\u54b1\u5c31\u4e0d\u8d58\u8ff0\u4e86\uff0c\u53cd\u6b63\u7f51\u4e0a\u3001\u6559\u79d1\u4e66\u4e0a\u5230\u5904\u90fd\u6709\u8bb2\u3002\u8fd9\u6b21\u54b1\u81ea\u5df1\u9047\u5230\u7684\u95ee\u9898\u4e3b\u8981\u662f\u865a\u7ee7\u627f\u548c\u666e\u901a\u591a\u91cd\u7ee7\u627f\u6ca1\u641e\u6e05\u533a\u522b\u3002 \u6211\u6709\u4e00\u5957\u865a\u63a5\u53e3hierarchy. class View { virtual int ID() = 0; virtual int Child() = 0; }; class TextView : public { virtual const char* getText() = 0; }; \u6b64\u5904\u7701\u53bb\u4ee3\u7801\u6570\u767e\u884c\u3002\u3002\u3002 \u4e4b\u540e\u5f53\u6211\u5f00\u59cb\u505a\u8fd9\u5957\u865a\u63a5\u53e3\u7684\u4e00\u7ec4\u5b9e\u73b0\u65f6\uff0c\u624d\u53d1\u73b0\u95ee\u9898\u3002 class SysView : public View { virtual int ID(); virtual int Child(); }; \u5230\u8fd9\u91cc\u8fd8\u662f\u90fd\u6b63\u5e38\u7684\u3002 class SysTextView : public SysView, public TextView { virtual &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[16,6],"class_list":["post-635","post","type-post","status-publish","format-standard","hentry","category-note","tag-16","tag-6"],"_links":{"self":[{"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/posts\/635","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/comments?post=635"}],"version-history":[{"count":4,"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/posts\/635\/revisions"}],"predecessor-version":[{"id":639,"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/posts\/635\/revisions\/639"}],"wp:attachment":[{"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/media?parent=635"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/categories?post=635"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hawkwithwind.net\/blog\/wp-json\/wp\/v2\/tags?post=635"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}