{"id":1978,"date":"2023-01-03T13:18:41","date_gmt":"2023-01-03T05:18:41","guid":{"rendered":"https:\/\/courtship.top\/?p=1978"},"modified":"2023-01-03T13:18:41","modified_gmt":"2023-01-03T05:18:41","slug":"%e5%b7%a6%e5%80%bc-%e4%b8%8e-%e5%8f%b3%e5%80%bc","status":"publish","type":"post","link":"https:\/\/courtship.top\/index.php\/2023\/01\/03\/%e5%b7%a6%e5%80%bc-%e4%b8%8e-%e5%8f%b3%e5%80%bc\/","title":{"rendered":"\u5de6\u503c \u4e0e \u53f3\u503c"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u539f\u6587\u5199\u7684\u5f88\u597d \u76f4\u63a5\u6458\u6284\u4e86<\/p>\n<cite>http:\/\/t.csdn.cn\/IpfnQ<\/cite><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u5386\u53f2\u6e0a\u6e90<\/h2>\n\n\n\n<p>\u8fd9\u4e2a\u4e16\u754c\u4e00\u76f4\u662f\u5728\u53d8\u5316\u7684\uff0c\u53ef\u80fd\u4e4b\u524d\u4f60\u4e00\u76f4\u5f15\u4ee5\u4e3a\u8c6a\u7684\u7ecf\u9a8c\u5927\u697c\uff0c\u8f6c\u773c\u4e4b\u95f4\u5c31\u4f1a\u503e\u584c\u3002\u5173\u4e8e\u5de6\u503c\u548c\u53f3\u503c\u7684\u5386\u53f2\uff0c\u666e\u904d\u7684\u89c2\u70b9\u662f\u6700\u521d\u6765\u6e90\u4e8e C \u8bed\u8a00\uff0c\u540e\u6765\u88ab\u5f15\u5165\u5230\u4e86 C++\uff0c\u4f46\u662f\u5173\u4e8e\u5de6\u503c\u548c\u53f3\u503c\u7684\u542b\u4e49\u548c\u5b9e\u73b0\u5374\u5728\u4e00\u76f4\u6539\u53d8\u548c\u5b8c\u5584\uff0c\u5bf9\u4e8e\u5b83\u7684\u5386\u53f2\u8bb2\u89e3\u53d1\u73b0\u4e00\u7bc7\u603b\u7ed3\u7684\u6bd4\u8f83\u597d\u7684\u6587\u7ae0 <a href=\"https:\/\/www.cnblogs.com\/dejavu\/archive\/2012\/09\/02\/2667640.html\" data-type=\"URL\" data-id=\"https:\/\/www.cnblogs.com\/dejavu\/archive\/2012\/09\/02\/2667640.html\" target=\"_blank\"  rel=\"nofollow\" >\u300aC\/C++ \u5de6\u503c\u548c\u53f3\u503c, L-value\u548cR-value\u300b<\/a>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-pullquote\"><blockquote><p>L-value\u4e2d\u7684L\u6307\u7684\u662fLocation,\u8868\u793a\u53ef\u5bfb\u5740. The \"l\" in lvalue can be thought&nbsp;of as location.<br \/>R-value\u4e2d\u7684R\u6307\u7684\u662fRead,\u8868\u793a\u53ef\u8bfb. The \"r\" in rvalue can be thought of as \"read\" value.<\/p><\/blockquote><\/figure>\n\n\n\n<p>\u8fd9\u662f2012\u5e74\u7684\u4e00\u7bc7\u6587\u7ae0\uff0c\u6587\u4e2d\u7ed9\u51fa\u4e86\u5386\u53f2\u8bf4\u660e\u4f9d\u636e\uff0c\u6700\u540e\u8fd8\u4e3e\u4e86\u4e00\u4e9b\u4f8b\u5b50\u6765\u8bf4\u660e C \u548c C++ \u5173\u4e8e\u5de6\u503c\u5b9e\u73b0\u7684\u4e0d\u540c\uff0c\u4f46\u662f\u5b9e\u9645\u64cd\u4f5c\u540e\u4f60\u4f1a\u53d1\u73b0\uff0c\u65f6\u95f4\u7684\u8f66\u8f6e\u65e9\u5df2\u5411\u524d\u884c\u8fdb\u4e86\u4e00\u5927\u622a\uff0c\u6587\u4e2d\u63d0\u5230\u7684\u90a3\u4e9b\u4e0d\u540c\uff0c\u5728\u6700\u65b0\u7684 gcc \u548c g++ \u7f16\u8bd1\u5668\u4e0a\u65e9\u5df2\u53d8\u5f97\u76f8\u540c\uff0c\u6587\u4e2d\u63d0\u5230\u7684\u53cd\u4f8b\u73b0\u5728\u770b\u6765\u51e0\u4e4e\u6ca1\u6709\u610f\u4e49\u4e86\u3002<\/p>\n\n\n\n<p>\u7b80\u5355\u68b3\u7406\u4e0b\uff0c\u5de6\u503c\u7684\u5b9a\u4e49\u6700\u65e9\u51fa\u73b0\u5728 \u300aThe C Programming Language \u300b\u4e00\u4e66\u4e2d\uff0c\u6307\u7684\u662f\u5f15\u7528\u4e00\u4e2a\u5bf9\u8c61\uff0c\u653e\u5728\u8d4b\u503c\u8868\u8fbe\u5f0f = \u5de6\u8fb9\u7684\u503c\u3002<\/p>\n\n\n\n<p>\u540e\u6765\u5728\u65b0\u7684 C \u8bed\u8a00\u6807\u51c6\u4e2d\u63d0\u5230\u5de6\u503c\u662f\u8d4b\u503c\u8868\u8fbe\u5f0f = \u5de6\u8fb9\u7684\u503c\u6216\u8005\u9700\u8981\u88ab\u6539\u53d8\u7684\u503c\uff0c\u800c\u7b49\u53f7\u7684\u53f3\u8fb9\u7684\u503c\u88ab\u79f0\u4e3a\u53f3\u503c\u3002\u5de6\u503c\u66f4\u597d\u7684\u8868\u8fbe\u4e3a\u53ef\u4ee5\u5b9a\u4f4d\u7684\u503c\uff0c\u800c\u53f3\u503c\u662f\u4e00\u79cd\u8868\u8fbe\u6570\u636e\u7684\u503c\uff0c\u57fa\u4e8e\u8fd9\u4e2a\u8868\u8ff0 L-value \u53ef\u4ee5\u7406\u89e3\u4e3a locator value\uff0c\u4ee3\u8868\u53ef\u5bfb\u5740\uff0c\u800c R-value \u53ef\u4ee5\u7406\u89e3\u4e3a read value\uff0c\u4ee3\u8868\u53ef\u8bfb\u53d6\u3002<\/p>\n\n\n\n<p>\u4e0d\u8fc7\u4ee5\u4e0a\u7684\u65b0\u89e3\uff0c\u5b8c\u5168\u662f\u4eba\u4eec\u4e3a\u4e86\u7406\u89e3\u5de6\u503c\u3001\u53f3\u503c\u8d4b\u4e88\u7684\u65b0\u542b\u4e49\uff0c\u4ece\u5386\u53f2\u53d1\u5c55\u6765\u770b\uff0c\u4e00\u5f00\u59cb\u5de6\u503c\u548c\u53f3\u503c\u5b8c\u5168\u5c31\u662f\u901a\u8fc7\u7b49\u53f7\u7684\u5de6\u8fb9\u548c\u53f3\u8fb9\u6765\u547d\u540d\u7684\uff0c\u53ea\u4e0d\u8fc7\u968f\u7740\u6807\u51c6\u7684\u5b8c\u5584\u548c\u8bed\u8a00\u7684\u53d1\u5c55\u3001\u66f4\u66ff\uff0c\u867d\u7136\u4e24\u4e2a\u540d\u5b57\u4fdd\u7559\u4e86\u4e0b\u6765\uff0c\u4f46\u662f\u5b83\u4eec\u7684\u542b\u4e49\u5374\u5728\u9010\u6b65\u53d1\u751f\u6539\u53d8\uff0c\u4e0e\u6700\u521d\u8bde\u751f\u65f6\u7684 = \u5de6\u53f3\u4e24\u8fb9\u7684\u503c\u8fd9\u4e2a\u542b\u4e49\u76f8\u6bd4\uff0c\u5df2\u7ecf\u76f8\u5dee\u5f88\u591a\u4e86\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8ba4\u8bc6\u5de6\u503c\u548c\u53f3\u503c<\/h2>\n\n\n\n<p><strong>\u5173\u4e8e\u5de6\u503c\u53f3\u503c\u6709\u51e0\u6761\u89c4\u5219\u548c\u7279\u70b9<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5de6\u503c\u548c\u53f3\u503c\u90fd\u662f\u6307\u7684\u8868\u8fbe\u5f0f\uff0c\u6bd4\u5982 int a = 1 \u4e2d\u7684 a \u662f\u5de6\u503c\uff0c++a \u662f\u5de6\u503c, func() \u4e5f\u53ef\u80fd\u662f\u5de6\u503c\uff0c\u800c a+1 \u662f\u53f3\u503c\uff0c 110 \u4e5f\u662f\u4e00\u4e2a\u53f3\u503c\u3002<\/li>\n\n\n\n<li>\u5de6\u503c\u53ef\u4ee5\u653e\u5728 = \u7684\u5de6\u8fb9\uff0c\u53f3\u503c\u53ea\u80fd\u653e\u5728 = \u7684\u53f3\u8fb9\uff0c\u8fd9\u5176\u4e2d\u9690\u542b\u7684\u610f\u601d\u5c31\u662f\u5de6\u503c\u4e5f\u80fd\u653e\u5728 = \u7684\u53f3\u8fb9\uff0c\u4f46\u662f\u53f3\u503c\u4e0d\u80fd\u653e\u5728 = \u7684\u5de6\u8fb9\u3002<\/li>\n\n\n\n<li>\u5de6\u503c\u53ef\u4ee5\u53d6\u5730\u5740\uff0c\u4ee3\u8868\u7740\u5185\u5b58\u4e2d\u67d0\u4e2a\u4f4d\u7f6e\uff0c\u53ef\u4ee5\u5b58\u50a8\u6570\u636e\uff0c\u53f3\u503c\u4ec5\u4ec5\u662f\u4e00\u4e2a\u503c\uff0c\u4e0d\u80fd\u53d6\u5730\u5740\uff0c\u6216\u8005\u5b83\u770b\u8d77\u6765\u662f\u4e00\u4e2a\u53d8\u91cf\uff0c\u4f46\u5b83\u662f\u4e34\u65f6\u7684\u65e0\u6cd5\u53d6\u5730\u5740\uff0c\u4f8b\u5982\u4e00\u4e2a\u51fd\u6570\u7684\u975e\u5f15\u7528\u7684\u503c\u8fd4\u56de\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0a\u89c4\u5219\u4ece\u5b9a\u4e49\u6765\u770b\u4e00\u70b9\u4e5f\u4e0d\u4e25\u8c28\uff0c\u6bd4\u5982\u4e00\u4e2a\u5e38\u91cf\u5b9a\u4e49\u662f\u53ef\u4ee5\u8d4b\u503c\uff0c\u540e\u9762\u5c31\u4e0d\u884c\u4e86\uff0c\u5b83\u4e5f\u53ef\u4ee5\u53d6\u5730\u5740\uff0c\u4f46\u662f\u4e0d\u80fd\u8d4b\u503c\u7684\u5b83\u5230\u5e95\u662f\u5de6\u503c\u8fd8\u662f\u53f3\u503c\uff0c\u8fd9\u70b9\u5176\u5b9e\u4e0d\u7528\u7ea0\u7ed3\uff0c\u5fc3\u91cc\u77e5\u9053\u8fd9\u4e2a\u60c5\u51b5\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<p>\u518d\u6bd4\u5982\u4e00\u4e2a\u666e\u901a\u53d8\u91cf\uff0c\u5b83\u539f\u672c\u662f\u4e00\u4e2a\u5de6\u503c\uff0c\u5f53\u7528\u5b83\u7ed9\u5176\u4ed6\u53d8\u91cf\u8d4b\u503c\u7684\u65f6\u5019\uff0c\u5b83\u53c8\u5316\u8eab\u4e3a\u4e00\u4e2a\u53f3\u503c\uff0c\u8fd9\u65f6\u5b83\u4e5f\u53ef\u4ee5\u53d6\u5730\u5740\uff0c\u597d\u50cf\u4e0e\u4e0a\u9762\u7684\u8bf4\u6cd5\u76f8\u8fdd\u80cc\u4e86\uff0c\u4f46\u662f\u4ed4\u7ec6\u60f3\u60f3\u771f\u7684\u662f\u8fd9\u6837\u5417\uff1f\u5b83\u53ea\u662f\u4e34\u65f6\u5316\u8eab\u4e3a\u53f3\u503c\uff0c\u5176\u5b9e\u662f\u4e00\u4e2a\u5de6\u503c\uff0c\u6240\u4ee5\u624d\u53ef\u4ee5\u53d6\u5730\u5740\u7684\u3002<\/p>\n\n\n\n<p>\u5176\u5b9e\u4f60\u5982\u679c\u4e0d\u505a\u5b66\u672f\u7814\u7a76\u3001\u4e0d\u65a4\u65a4\u8ba1\u8f83\uff0c\u90a3\u4e48\u5b8c\u5168\u53ef\u4ee5\u628a\u80fd\u591f\u8d4b\u503c\u7684\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u5de6\u503c\uff0c\u7136\u540e\u628a\u5de6\u503c\u4ee5\u5916\u7684\u8868\u8fbe\u5f0f\u770b\u6210\u53f3\u503c\uff0c\u5982\u679c\u4f60\u4e0d\u719f\u6089\u89e3\u5de6\u503c\u548c\u53f3\u503c\u53ef\u80fd\u6839\u672c\u4e0d\u4f1a\u5f71\u54cd\u4f60\u5e73\u65f6\u7684\u5de5\u4f5c\u548c\u5b66\u4e60\uff0c\u4f46\u662f\u4e86\u89e3\u5b83\u6709\u52a9\u4e8e\u6211\u4eec\u6df1\u5165\u7406\u89e3\u4e00\u4e9b\u5185\u7f6e\u8fd0\u7b97\u7b26\u548c\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\uff0c\u4ee5\u53ca\u5728\u51fa\u73b0\u7f16\u8bd1\u9519\u8bef\u7684\u65f6\u5019\u53ca\u65f6\u5b9a\u4f4d\u95ee\u9898\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5177\u4f53\u7684\u5b9e\u4f8b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u8d4b\u503c\u8bed\u53e5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>int age = 18;<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8d4b\u503c\u8bed\u53e5\u5f88\u7b80\u5355\uff0c= \u4f5c\u4e3a\u5206\u754c\u7ebf\uff0c\u5de6\u8fb9\u7684 age \u662f\u5de6\u503c\uff0c\u53ef\u4ee5\u88ab\u8d4b\u503c\uff0c\u53ef\u4ee5\u53d6\u5730\u5740\uff0c\u5b83\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u8868\u8fbe\u5f0f\uff0c\u4ee3\u8868\u4e00\u4e2a\u53ef\u4ee5\u5b58\u50a8\u6574\u6570\u7684\u5185\u5b58\u5730\u5740\uff1b\u53f3\u8fb9\u7684 18 \u4e5f\u662f\u4e00\u4e2a\u8868\u8fbe\u5f0f\uff0c\u660e\u663e\u53ea\u80fd\u4f5c\u4e3a\u53f3\u503c\uff0c\u4e0d\u80fd\u53d6\u5730\u5740\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>18 = age;<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u8bed\u53e5\u5728\u7f16\u8bd1\u65f6\u4f1a\u63d0\u793a\u4e0b\u9762\u7684\u9519\u8bef\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>error: lvalue required as left operand of assignment<\/code><\/pre>\n\n\n\n<p>\u9519\u8bef\u63d0\u793a\u663e\u793a\uff1a\u8d4b\u503c\u8bed\u53e5\u7684\u5de6\u8fb9\u9700\u8981\u4e00\u4e2a\u5de6\u503c\uff0c\u663e\u7136 18 \u4e0d\u80fd\u4f5c\u4e3a\u5de6\u503c\uff0c\u5b83\u4e0d\u4ee3\u8868\u4efb\u4f55\u5185\u5b58\u5730\u5740\uff0c\u4e0d\u80fd\u88ab\u6539\u53d8\u3002\u5982\u679c\u7a0b\u5e8f\u4e2d\u7684\u8868\u8fbe\u5f0f\u90fd\u8fd9\u4e48\u7b80\u5355\u5c31\u4e0d\u9700\u8981\u7ea0\u7ed3\u4e86\uff0c\u63a5\u7740\u6211\u4eec\u5f80\u4e0b\u770b\u4e00\u4e9b\u590d\u6742\u70b9\u7684\u4f8b\u5b50\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u81ea\u589e\u81ea\u51cf\u8fd0\u7b97<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>++age++;<\/code><\/pre>\n\n\n\n<p>\u7b2c\u4e00\u773c\u770b\u5230\u8fd9\u4e2a\u8868\u8fbe\u5f0f\uff0c\u4f60\u611f\u89c9\u5b83\u4f1a\u600e\u6837\u8fd0\u7b97\uff0c\u7f16\u8bd1\u4e00\u4e0b\uff0c\u4f60\u4f1a\u53d1\u73b0\u7f16\u8bd1\u5931\u8d25\u4e86\uff0c\u9519\u8bef\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>error: lvalue required as increment operand<\/code><\/pre>\n\n\n\n<p>\u52a0\u4e2a\u62ec\u53f7\u8bd5\u8bd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>++(age++)<\/code><\/pre>\n\n\n\n<p>\u7f16\u8bd1\u4e4b\u540e\u4f1a\u51fa\u73b0\u76f8\u540c\u7684\u9519\u8bef\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>error: lvalue required as increment operand<\/code><\/pre>\n\n\n\n<p>\u518d\u6362\u4e00\u79cd\u52a0\u62ec\u53f7\u7684\u65b9\u5f0f\u518d\u7f16\u8bd1\u4e00\u6b21\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(++age)++<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6b21\u6210\u529f\u7f16\u8bd1\u4e86\uff0c\u5e76\u4e14\u8f93\u51fa\u503c\u4e4b\u540e\u53d1\u73b0 age \u53d8\u91cf\u589e\u52a0\u4e86\u4e24\u6b21\u3002<\/p>\n\n\n\n<p>\u5148\u4e0d\u8003\u8651\u5de6\u503c\u53f3\u503c\u7684\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u4ece\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u53d1\u73b0\u81ea\u589e\u8fd0\u7b97\u7684\u4f18\u5148\u7ea7\uff0c\u540e\u7f6e\u81ea\u589e age++ \u7684\u4f18\u5148\u7ea7\u8981\u9ad8\u4e8e\u524d\u7f6e\u81ea\u589e ++age \u7684\u4f18\u5148\u7ea7\u3002<\/p>\n\n\n\n<p><strong>\u73b0\u5728\u56de\u8fc7\u5934\u6765\u770b\u770b\u4e4b\u524d\u7684\u7f16\u8bd1\u9519\u8bef\uff0c\u4e3a\u4ec0\u4e48\u6211\u4eec\u52a0\u62ec\u53f7\u6539\u53d8\u8fd0\u7b97\u987a\u5e8f\u4e4b\u540e\u5c31\u53ef\u4ee5\u6b63\u5e38\u6267\u884c\u4e86\u5462\uff1f\u8fd9\u5176\u5b9e\u548c\u81ea\u589e\u8fd0\u7b97\u7684\u5b9e\u73b0\u6709\u5173\u3002<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u524d\u7f6e\u81ea\u589e<\/h4>\n\n\n\n<p>\u524d\u7f6e\u81ea\u589e\u7684\u4e00\u822c\u5b9e\u73b0\uff0c\u662f\u76f4\u63a5\u4fee\u6539\u539f\u5bf9\u8c61\uff0c\u5728\u539f\u5bf9\u8c61\u4e0a\u5b9e\u73b0\u81ea\u589e\uff0c\u7136\u540e\u5c06\u539f\u5bf9\u8c61\u4ee5\u5f15\u7528\u65b9\u5f0f\u8fd4\u56de\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UPInt&amp; UPInt::operator++()<br \/>{<br \/>\u3000*this += 1; \/\/ \u539f\u5bf9\u8c61\u81ea\u589e<br \/>\u3000return *this; \/\/ \u8fd4\u56de\u539f\u5bf9\u8c61<br \/>}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u4e00\u76f4\u64cd\u4f5c\u7684\u662f\u539f\u5bf9\u8c61\uff0c\u8fd4\u56de\u7684\u4e5f\u662f\u539f\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u6240\u4ee5\u524d\u7f6e\u81ea\u589e\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u662f\u5de6\u503c\uff0c\u5b83\u5f15\u7528\u7684\u662f\u539f\u5bf9\u8c61\u4e4b\u524d\u6240\u5360\u7528\u7684\u5185\u5b58\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u540e\u7f6e\u81ea\u589e<\/h4>\n\n\n\n<p>\u540e\u7f6e\u81ea\u589e\u7684\u4e00\u822c\u5b9e\u73b0\uff0c\u662f\u5148\u5c06\u539f\u5bf9\u8c61\u7684\u6570\u636e\u5b58\u50a8\u5230\u4e34\u65f6\u53d8\u91cf\u4e2d\uff0c\u63a5\u7740\u5728\u539f\u5bf9\u8c61\u4e0a\u5b9e\u73b0\u81ea\u589e\uff0c\u7136\u540e\u5c06\u4e34\u65f6\u53d8\u91cf\u4ee5\u53ea\u8bfb\u7684\u65b9\u5f0f\u8fd4\u56de\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const UPInt UPInt::operator++(int)<br \/>{<br \/>\u3000UPInt oldValue = <em>this; \/\/ \u5c06\u539f\u5bf9\u8c61\u8d4b\u503c\u7ed9\u4e34\u65f6\u53d8\u91cf \u3000++(<\/em>this); \/\/ \u539f\u5bf9\u8c61\u81ea\u589e<br \/>\u3000return oldValue; \/\/ \u8fd4\u56de\u4e34\u65f6\u53d8\u91cf<br \/>}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u91cc\u8fd4\u56de\u7684\u662f\u4e34\u65f6\u53d8\u91cf\uff0c\u5728\u51fd\u6570\u8fd4\u56de\u540e\u5c31\u88ab\u9500\u6bc1\u4e86\uff0c\u65e0\u6cd5\u5bf9\u5176\u53d6\u5730\u5740\uff0c\u6240\u4ee5\u540e\u7f6e\u81ea\u589e\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u662f\u53f3\u503c\uff0c\u4e0d\u80fd\u5bf9\u5176\u8fdb\u884c\u8d4b\u503c\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u8868\u8fbe\u5f0f ++age++; \u5148\u8fdb\u884c\u540e\u7f6e\u81ea\u589e\uff0c\u7136\u540e\u518d\u8fdb\u884c\u524d\u7f6e\u81ea\u589e\u5c31\u62a5\u51fa\u7f16\u8bd1\u9519\u8bef\u4e86\uff0c\u56e0\u4e3a\u4e0d\u80fd\u4fee\u6539\u53f3\u503c\uff0c\u4e5f\u4e0d\u80fd\u5bf9\u53f3\u503c\u8fdb\u884c\u81ea\u589e\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u81ea\u589e\u8868\u8fbe\u5f0f\u8d4b\u503c<\/h3>\n\n\n\n<p>\u524d\u9762\u8bf4\u5230\u524d\u7f6e\u81ea\u589e\u8868\u8fbe\u5f0f\u662f\u4e00\u4e2a\u5de6\u503c\uff0c\u90a3\u80fd\u4e0d\u80fd\u5bf9\u5176\u8d4b\u503c\u5462\uff1f\u5f53\u7136\u53ef\u4ee5\uff01\u8bd5\u8bd5\u4e0b\u9762\u7684\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>++age = 20;<\/code><\/pre>\n\n\n\n<p>\u8fd9\u6761\u8bed\u53e5\u662f\u53ef\u4ee5\u6b63\u5e38\u901a\u8fc7\u7f16\u8bd1\u7684\uff0c\u5e76\u4e14\u6267\u884c\u4e4b\u540e age \u53d8\u91cf\u7684\u503c\u4e3a 20\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u51fd\u6570\u8868\u8fbe\u5f0f<\/h3>\n\n\n\n<p>\u51fd\u6570\u53ef\u4ee5\u4f5c\u4e3a\u5de6\u503c\u5417\uff1f\u5e26\u7740\u8fd9\u4e2a\u7591\u95ee\u6211\u4eec\u770b\u4e00\u4e0b\u8fd9\u4e2a\u8d4b\u503c\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>func() = 6;<\/code><\/pre>\n\n\n\n<p>\u53ef\u80fd\u6709\u4e9b\u540c\u5b66\u4f1a\u6709\u7591\u95ee\uff0c\u8fd9\u662f\u6b63\u5e38\u7684\u8bed\u53e5\u5417\uff1f\u5176\u5b9e\u5b83\u662f\u53ef\u4ee5\u6b63\u5e38\u7684\uff0c\u53ea\u8981 func() \u662f\u4e00\u4e2a\u5de6\u503c\u5c31\u53ef\u4ee5\uff0c\u600e\u4e48\u624d\u80fd\u8ba9\u4ed6\u6210\u4e3a\u4e00\u4e2a\u5de6\u503c\u5462\uff0c\u60f3\u60f3\u521a\u624d\u7684\u524d\u7f6e\u81ea\u589e\u8fd0\u7b97\u53ef\u80fd\u4f1a\u7ed9\u4f60\u542f\u53d1\uff0c\u8981\u60f3\u8ba9\u4ed6\u6210\u4e3a\u5de6\u503c\uff0c\u5b83\u5fc5\u987b\u4ee3\u8868\u4e00\u4e2a\u5185\u5b58\u5730\u5740\uff0c\u5199\u6210\u4e0b\u9762\u8fd9\u6837\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int g;\n\nint&amp; func()\n{\n    return g;\n}\n\nint main()\n{\n    func() = 100;\n}<\/code><\/pre>\n\n\n\n<p>\u51fd\u6570 func() \u8fd4\u56de\u7684\u662f\u5168\u5c40\u53d8\u91cf g \u7684\u5f15\u7528\uff0c\u53d8\u91cf g \u662f\u4e00\u4e2a\u53ef\u53d6\u5730\u5740\u7684\u5de6\u503c\uff0c\u6240\u4ee5 func() \u8868\u8fbe\u5f0f\u4e5f\u662f\u4e00\u4e2a\u5de6\u503c\uff0c\u5bf9\u5176\u8d4b\u503c\u540e\u5c31\u6539\u53d8\u4e86\u5168\u5c40\u53d8\u91cf g \u7684\u503c\u3002<\/p>\n\n\n\n<p>\u90a3\u4e48\u6211\u4eec\u6ce8\u610f\u5230\u8fd9\u91cc func() \u51fd\u6570\u8fd4\u56de\u7684\u662f\u5168\u5c40\u53d8\u91cf\u7684\u5f15\u7528\uff0c\u5982\u679c\u662f\u5c40\u90e8\u53d8\u91cf\u4f1a\u600e\u4e48\u6837\u5462\uff1f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int&amp; func()\n{\nint i = 101;\nreturn i;\n}\n\nint main()\n{\nfunc() = 100;\n}<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u4e4b\u540e\u53ef\u5c31\u60e8\u4e86\uff0c\u76f4\u63a5\u663e\u793a\u6bb5\u9519\u8bef\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Segmentation fault (core dumped)<\/code><\/pre>\n\n\n\n<p>\u6539\u4e3a\u5c40\u90e8\u53d8\u91cf\u4e4b\u540e\uff0cfunc() \u51fd\u6570\u867d\u7136\u8fd4\u56de\u4e86\u4e00\u4e2a\u503c\uff0c\u4f46\u662f\u8fd9\u4e2a\u503c\u662f\u4e00\u4e2a\u4e34\u65f6\u503c\uff0c\u51fd\u6570\u8fd4\u56de\u4e4b\u540e\u8be5\u503c\u88ab\u9500\u6bc1\uff0c\u5bf9\u5e94\u7684\u5185\u5b58\u7a7a\u95f4\u4e5f\u4e0d\u5c5e\u4e8e\u5b83\u4e86\uff0c\u6240\u4ee5\u5728\u6700\u540e\u8d4b\u503c\u7684\u65f6\u5019\u624d\u4f1a\u51fa\u73b0\u6bb5\u9519\u8bef\uff0c\u5c31\u548c\u6211\u4eec\u8bbf\u95ee\u975e\u6cd5\u5185\u5b58\u662f\u4ea7\u751f\u7684\u9519\u8bef\u65f6\u4e00\u6837\u7684\u3002<br \/><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u603b\u7ed3<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u4ee5\u88ab\u8d4b\u503c\u7684\u8868\u8fbe\u5f0f\u662f\u5de6\u503c\uff0c\u5de6\u503c\u53ef\u4ee5\u53d6\u5730\u5740\u3002<\/li>\n\n\n\n<li>\u53f3\u503c\u5e94\u8be5\u662f\u4e00\u4e2a\u8868\u793a\u503c\u7684\u8868\u8fbe\u5f0f\uff0c\u4e0d\u662f\u5de6\u503c\u7684\u8868\u8fbe\u5f0f\u90fd\u53ef\u4ee5\u770b\u6210\u662f\u53f3\u503c <\/li>\n\n\n\n<li>\u540e\u7f6e\u81ea\u589e\u64cd\u4f5c\u7b26\u7684\u4f18\u5148\u7ea7\u8981\u9ad8\u4e8e\u524d\u7f6e\u81ea\u589e\u64cd\u4f5c\u7b26\uff0c\u5b83\u4eec\u662f\u6309\u7167\u4ece\u53f3\u5411\u5de6\u7ed3\u5408\u7684 <\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u539f\u6587\u5199\u7684\u5f88\u597d \u76f4\u63a5\u6458\u6284\u4e86 http:\/\/t.csdn.cn\/IpfnQ \u5386\u53f2\u6e0a\u6e90 \u8fd9\u4e2a\u4e16\u754c\u4e00\u76f4\u662f\u5728\u53d8\u5316\u7684\uff0c\u53ef\u80fd\u4e4b\u524d\u4f60\u4e00\u76f4\u5f15\u4ee5\u4e3a\u8c6a\u7684 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-1978","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts\/1978","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/comments?post=1978"}],"version-history":[{"count":0,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts\/1978\/revisions"}],"wp:attachment":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/media?parent=1978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/categories?post=1978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/tags?post=1978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}