{"id":168,"date":"2021-03-29T19:20:50","date_gmt":"2021-03-29T11:20:50","guid":{"rendered":"https:\/\/blogs.gongqilin.cn\/?p=168"},"modified":"2021-03-30T08:39:26","modified_gmt":"2021-03-30T00:39:26","slug":"%e5%85%b3%e4%ba%8e%e7%b1%bb%e5%86%85%e9%9d%99%e6%80%81%e6%88%90%e5%91%98%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/blogs.gongqilin.cn\/?p=168","title":{"rendered":"\u5173\u4e8e\u7c7b\u5185\u9759\u6001\u6210\u5458\u53d8\u91cf\u7684\u521d\u59cb\u5316\u53ca\u5176\u7f16\u8bd1\u5f02\u5e38"},"content":{"rendered":"<p>\u4eca\u5929\u53c8\u5fd8\u4e86\u5bf9\u7c7b\u5185\u9759\u6001\u6210\u5458\u53d8\u91cf\u8fdb\u884c\u521d\u59cb\u5316\u4e86\uff0c <img src=\"https:\/\/blogs.gongqilin.cn\/wp-content\/themes\/git\/assets\/img\/smilies\/icon_rolleyes.gif\" alt=\":roll:\" class=\"wp-smiley\" style=\"height: 1em; max-height: 1em;\" \/> \uff0c\u6700\u4e3b\u8981\u662f\u53d1\u751f\u4e86\u4e00\u5947\u602a\u7684\u9519\u8bef\uff0c\u8fd9\u91cc\u8bb0\u5f55\u4e00\u4e0b\u3002<br \/>\n\u5982\u4e0b\u4ee3\u7801<\/p>\n<pre class=\"prettyprint linenums\">\/\/\u6587\u4ef6B.h\r\nclass B{\r\n    int k ;\r\n};\r\n\r\n\/\/\u6587\u4ef6A.h\r\nclass B; \/\/\u524d\u7f6e\u58f0\u660e\r\nclass A{\r\npublic:\r\n    static void Init(){\r\n        a = 0;\r\n        b = new B();\r\n    };\r\npublic:   \r\n    static int a; \/\/\u58f0\u660e\u4f46\u672a\u5b9a\u4e49\uff0c\u8fd8\u672a\u5206\u914d\u5185\u5b58\r\n    static B *b; \/\/\u58f0\u660e\u4f46\u672a\u5b9a\u4e49\uff0c\u8fd8\u672a\u5206\u914d\u5185\u5b58\r\n};\r\n\r\n\/\/\u6587\u4ef6A.cpp\r\n#include &quot;B.h&quot;\r\nint A::a = 1;\r\nB* A::b;\r\n\r\n\/\/\u6587\u4ef6C.cpp\r\n#include &quot;A.h&quot;\r\nvoid C::Init(){\r\n    A::Init = 0;\r\n}\r\nvoid C::Set(){\r\n    A::a = 1; \r\n}\r\n<\/pre>\n<p>\u5728\u63cf\u8ff0\u95ee\u9898\u524d\uff0c\u6211\u4eec\u5148\u6765\u4e86\u89e3\u51e0\u4e2a\u77e5\u8bc6\u70b9\uff1a<\/p>\n<ul>\n<li>\u5982\u679c\u4e00\u4e2a\u7c7b\u51fd\u6570\u672a\u6709\u4efb\u4f55\u8c03\u7528\uff0c\u4e0d\u7ba1\u4ed6\u865a\u51fd\u6570\u3001\u7eaf\u865a\u51fd\u6570\u3001\u9759\u6001\u51fd\u6570\u6216\u8005\u666e\u901a\u7684\u51fd\u6570\u662f\u4e0d\u4f1a\u51fa\u73b0\u94fe\u63a5\u9519\u8bef\u7684\uff08\u5982\u679c\u6ca1\u6709\u7f16\u8bd1\u9519\u8bef\uff0c\u6bd4\u5982\u8bed\u6cd5\u9519\u8bef\u7b49\uff09\uff1b<\/li>\n<li>\u5f53\u7c7b\u5b9e\u4f8b\u5316\u65f6\uff0c\u7eaf\u865a\u51fd\u6570\u4f1a\u5728\u7f16\u8bd1\u9636\u6bb5\u62a5\u9519\uff0c\u865a\u51fd\u6570\u4f1a\u5728\u94fe\u63a5\u65f6\u62a5\u9519\uff1b<\/li>\n<li>\u4e00\u822c\u51fd\u6570\u548c\u9759\u6001\u51fd\u6570\u53ef\u4ee5\u5b9e\u4f8b\u5316\uff0c\u4f46\u662f\u8c03\u7528\u672a\u5b9e\u73b0\u7684\u51fd\u6570\u4f1a\u51fa\u73b0\u94fe\u63a5\u9519\u8bef\uff1b<\/li>\n<li>\u7c7b\u9759\u6001\u6210\u5458\u53d8\u91cf\u521d\u59cb\u5316\u5728\u7c7b\u4f53\u5916\u8fdb\u884c\uff0c\u800c\u524d\u9762\u4e0d\u52a0static\uff0c\u4ee5\u514d\u4e0e\u4e00\u822c\u9759\u6001\u53d8\u91cf\u6216\u5bf9\u8c61\u76f8\u6df7\u6dc6\u3002<\/li>\n<li>\u521d\u59cb\u5316\u65f6\u4e0d\u52a0\u8be5\u6210\u5458\u7684\u8bbf\u95ee\u6743\u9650\u63a7\u5236\u7b26private\uff0cpublic\u7b49\u3002<\/li>\n<li>\u521d\u59cb\u5316\u65f6\u4f7f\u7528\u4f5c\u7528\u57df\u8fd0\u7b97\u7b26\u6765\u6807\u660e\u5b83\u6240\u5c5e\u7c7b\uff0c\u56e0\u6b64\uff0c\u9759\u6001\u6570\u636e\u6210\u5458\u662f\u7c7b\u7684\u6210\u5458\uff0c\u800c\u4e0d\u662f\u5bf9\u8c61\u7684\u6210\u5458\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e2a\u65f6\u5019\u5728\u56de\u5934\u770b\u4ee3\u7801\uff0c\u6211\u4eec\u4f1a\u53d1\u73b0\u5728A.h\u6587\u4ef6\u4e2d\uff0cA\u7c7b\u6709\u9759\u6001\u53d8\u91cfa\u548c*b,\u8fd9\u4e2a\u65f6\u5019\u53ea\u662f\u58f0\u660e\uff0c\u4f7f\u7528\u524d\u7f6e\u58f0\u660eclass B;\u5373\u4f7f\u6211\u4eec\u4e0d\u77e5\u9053\u4efb\u4f55\u4e0eB\u76f8\u5173\u7684\u4fe1\u606f\uff08\u4f46\u5fc5\u987b\u5b58\u5728\uff0c\u5426\u5219\u4f1a\u62a5\u7f16\u8bd1\u9519\u8bef\uff09\u540c\u6837\u53ef\u4ee5\u7f16\u8bd1\u901a\u8fc7\u3002\u8fd9\u4e2a\u65f6\u5019\u5e76\u6ca1\u6709\u7ed9a\uff0c*b\u5206\u914d\u7a7a\u95f4\u3002\u6240\u4ee5\u5982\u679c\u8981\u4f7f\u7528a\u6216\u8005*b\u5c31\u5fc5\u987b\u5f97\u5728A.cpp\u8fdb\u884c\u5b9a\u4e49\uff08\u7533\u8bf7\u7a7a\u95f4\uff0c\u53ef\u4ee5\u8fdb\u884c\u521d\u59cb\u5316\uff09\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5982\u679c\u8fd9\u4e2a\u65f6\u5019\u6211\u4eecA.cpp\u7684\u5bf9a\u548c*b\u7684\u5b9a\u4e49\uff0c\u5e76\u6ce8\u91caC.cpp\u7684\u4e24\u4e2a\u51fd\u6570\uff0c\u6211\u4eec\u7f16\u8bd1\u94fe\u63a5\u6ca1\u6709\u53d1\u73b0\u4efb\u4f55\u9519\u8bef\u3002\u4f46\u662f\u5982\u679c\u6211\u4eec\u5728C.cpp\u4e2d\u4f7f\u7528\u4e86Init()\u51fd\u6570\uff0c\u5b83\u4f1a\u8c03\u7528A\u7c7b\u7684Init\uff08\uff09\uff0c\u8fd9\u4e2a\u65f6\u5019\u94fe\u63a5\u9636\u6bb5\u5c31\u4f1a\u62a5\u9519\u672a\u5b9a\u4e49 undefined reference\uff0c\u8fd9\u4e00\u6b21\u6211\u4e0d\u5c0f\u5fc3\u5c31\u662f\u8fd9\u6837\uff0c\u5728A.cpp\u4e2d\u672a\u5bf9\u9759\u6001\u6210\u5458\u53d8\u91cf\u5b9a\u4e49\u5e76\u521d\u59cb\u5316\uff0c\u4e14\u76f4\u63a5\u5728C.cpp\u5f00\u59cb\u4f7f\u7528\uff0c\u8be1\u5f02\u7684\u4e8b\u60c5\u53d1\u751f\u4e86\uff0c\u62a5\u7684\u9519\u8bef\u8fd8\u662f\u94fe\u63a5\u7684undefined reference\uff0c\u4f46\u662f\u5947\u602a\u7684\u662f\u7f16\u8bd1\u5668\u63d0\u793a\u9519\u8bef\u7684\u4f4d\u7f6e\u5728\u53e6\u4e00\u4e2a\u6587\u4ef6\u91cc\u9762\uff08\u88abC.cpp\u5305\u542b\uff09\uff0c\u90a3\u4e2a\u6587\u4ef6\u672a\u5bf9A\u7c7b\u6ca1\u6709\u4efb\u4f55\u8bbf\u95ee\u3002C.cpp\u5c4f\u853d\u5bf9\u8be5\u6587\u4ef6\u7684\u5305\u542b\u540e\u53d1\u73b0\u53ea\u5bf9\u8d4b\u503c\u7c7b\u578b\u7684\u8bed\u53e5\u62a5\u9519\uff0c\u5982A::a=1\uff1b\u4f46\u662fif(1 == A::a)\u4e5f\u4e0d\u4f1a\u62a5\u9519\u7684\u3002\u5f53\u65f6\u770b\u5230\u8fd9\u91cc\u5f88\u61f5\u903c\uff0c\u8fd8\u60f3\u7740if(1 == A::a)\u90fd\u6ca1\u6709\u62a5\u9519\u672a\u5b9a\u4e49\uff0c\u8bf4\u660e\u5b9a\u4e49\u4e86\u7684\u5440\uff0c\u4f46\u662f\u8d4b\u503c\u5c31\u662f\u4e0d\u884c\u3002\u4ee5\u524d\u90fd\u662f\u5199\u597dA.cpp\u5bf9A::Init()\u8c03\u7528\u540e\uff0c\u5f88\u5bb9\u6613\u5c31\u4f1a\u53d1\u73b0\u8fd9\u4e2a\u672a\u5b9a\u4e49\u7684\u94fe\u63a5\u9519\u8bef\uff0c\u8fd9\u6b21\u62a5\u9519\u7684\u63d0\u793a\u786e\u662f\u8be1\u5f02\uff0c\u76ee\u524d\u8fd8\u4e0d\u77e5\u9053\u4e3a\u5565\u4f1a\u5728\u62a5\u9519\u4e2d\u63d0\u793a\u5728\u53e6\u5916\u7684\u6587\u4ef6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u5929\u53c8\u5fd8\u4e86\u5bf9\u7c7b\u5185\u9759\u6001\u6210\u5458\u53d8\u91cf\u8fdb\u884c\u521d\u59cb\u5316\u4e86\uff0c \uff0c\u6700\u4e3b\u8981\u662f\u53d1\u751f\u4e86\u4e00\u5947\u602a\u7684\u9519\u8bef\uff0c\u8fd9\u91cc\u8bb0\u5f55\u4e00\u4e0b\u3002 \u5982\u4e0b\u4ee3\u7801 \/\/\u6587\u4ef6B [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-168","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=\/wp\/v2\/posts\/168","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=168"}],"version-history":[{"count":9,"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=\/wp\/v2\/posts\/168\/revisions"}],"predecessor-version":[{"id":177,"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=\/wp\/v2\/posts\/168\/revisions\/177"}],"wp:attachment":[{"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=168"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=168"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.gongqilin.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}