{"id":352,"date":"2023-01-11T23:03:19","date_gmt":"2023-01-11T15:03:19","guid":{"rendered":"https:\/\/9iwd.top\/?p=352"},"modified":"2023-01-11T23:03:20","modified_gmt":"2023-01-11T15:03:20","slug":"09-6-c%e7%bb%93%e6%9e%84%e4%bd%93%e4%b8%adconst%e4%bd%bf%e7%94%a8%e5%9c%ba%e6%99%af","status":"publish","type":"post","link":"http:\/\/9iwd.top\/?p=352","title":{"rendered":"09.6 C++\u7ed3\u6784\u4f53\u4e2dconst\u4f7f\u7528\u573a\u666f"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>#include &lt;iostream>\t \/\/ \u8f93\u51fa\u6d41\u5e93\r\n#include &lt;string>\r\nusing namespace std; \/\/ \u4f7f\u7528\u6807\u51c6\u547d\u540d\u7a7a\u95f4\r\n\r\n\/\/ \u8bfe\u7a0b\uff1a09.6 \u7ed3\u6784\u4f53\u4e2dconst\u4f7f\u7528\u573a\u666f\r\n\r\n\r\n\/\/\u521b\u5efa\u5b66\u751f\u7ed3\u6784\u4f53\r\nstruct student\r\n{\r\n\tstring name;\r\n\tint age;\r\n\tint score;\r\n};\r\n\r\n\/\/\u521b\u5efa\u51fd\u6570\u5f15\u7528\u7ed3\u6784\u4f53\r\n\/\/\u503c\u4f20\u9012\uff0c\u4f1a\u5728\u5185\u5b58\u53e6\u5916\u521b\u5efa\u76f8\u540c\u6570\u636e\u7684\u5185\u5b58\r\nvoid test1(student x)\r\n{\r\n\tcout &lt;&lt; \"-- \u503c\u4f20\u9012\u51fd\u6570 --\" &lt;&lt; endl;\r\n\tcout &lt;&lt; \"\u59d3\u540d\uff1a\" &lt;&lt; x.name\r\n\t\t&lt;&lt; \" \u5e74\u9f84\" &lt;&lt; x.age\r\n\t\t&lt;&lt; \" \u5206\u6570\uff1a\" &lt;&lt; x.score &lt;&lt; endl;\r\n}\r\n\r\n\/\/\u521b\u5efa\u5730\u5740\u4f20\u9012\u51fd\u6570\r\n\/\/\u5730\u5740\u4f20\u9012\uff0c\u5982\u679c\u5728\u51fd\u6570\u4f53\u5185\u4fee\u6539\u4e86\u6307\u9488\u6307\u5411\u7684\u503c\uff0c\u5916\u90e8\u4e5f\u4f1a\u8ddf\u7740\u4fee\u6539\r\nvoid test2(student* x)\r\n{\r\n\tx->age = 28;\/\/ \u4fee\u6539\u540e\uff0c\u5916\u90e8\u4e5f\u4f1a\u8ddf\u7740\u4fee\u6539\r\n\tcout &lt;&lt; \"-- \u5730\u5740\u4f20\u9012\u51fd\u6570 --\" &lt;&lt; endl;\r\n\t\tcout &lt;&lt; \"\u59d3\u540d\uff1a\" &lt;&lt; x->name\r\n\t\t&lt;&lt; \" \u5e74\u9f84\" &lt;&lt; x->age\r\n\t\t&lt;&lt; \" \u5206\u6570\uff1a\" &lt;&lt; x->score &lt;&lt; endl;\r\n}\r\n\r\n\/\/\u521b\u5efaconst\u4fee\u9970\u5730\u5740\u4f20\u9012\u51fd\u6570\r\n\/\/const\u5730\u5740\u4f20\u9012\uff0c\u53ea\u80fd\u8bfb\u53d6\uff0c\u4e0d\u80fd\u4fee\u6539\r\nvoid test3(const student* x)\r\n{\r\n\t\/\/x->age = 35; const\u4fee\u9970\u540e\uff0c\u4e0d\u5141\u8bb8\u4fee\u6539,\u4e00\u65e6\u4fee\u6539\u4f1a\u62a5\u9519\uff0c\u907f\u514d\u8bef\u64cd\u4f5c\r\n\tcout &lt;&lt; \"-- const\u5730\u5740\u4f20\u9012\u51fd\u6570 --\" &lt;&lt; endl;\r\n\t\tcout &lt;&lt; \"\u59d3\u540d\uff1a\" &lt;&lt; x->name\r\n\t\t&lt;&lt; \" \u5e74\u9f84\" &lt;&lt; x->age\r\n\t\t&lt;&lt; \" \u5206\u6570\uff1a\" &lt;&lt; x->score &lt;&lt; endl;\r\n}\r\nint main()\r\n{\r\n\t\/\/\u521b\u5efa\u7ed3\u6784\u4f53\u53d8\u91cf\r\n\tstruct student x = { \"\u5c0f\u738b\",16,68 };\r\n\tcout &lt;&lt; \"-- main\u539f\u59cb\u6570\u636e --\" &lt;&lt; endl;\r\n\tcout &lt;&lt; \"\u59d3\u540d\uff1a\" &lt;&lt; x.name\r\n\t\t&lt;&lt; \" \u5e74\u9f84\" &lt;&lt; x.age\r\n\t\t&lt;&lt; \" \u5206\u6570\uff1a\" &lt;&lt; x.score &lt;&lt; \"\\n\\n\";\r\n\r\n\r\n\t\/\/\u503c\u4f20\u9012\u51fd\u6570\r\n\ttest1(x);\r\n\r\n\t\/\/\u6307\u9488\u4f20\u9012\uff0c\u4fee\u6539\u503c\u4e4b\u540e\uff0c\u5916\u90e8\u4e5f\u8ddf\u7740\u4fee\u6539\u4e86\r\n\ttest2(&amp;x);\r\n\tcout &lt;&lt; \"main\u5e74\u9f84\uff1a\" &lt;&lt; x.age &lt;&lt; endl;\r\n\r\n\t\/\/\u4f7f\u7528const\u4fee\u9970\u6307\u9488\u7684\u6307\u9488\u4f20\u9012\r\n\ttest3(&amp;x);\r\n\r\n\r\n\r\n\tsystem(\"pause\"); \/\/ \u63a7\u5236\u53f0\u6682\u505c\uff0c\u7b49\u5f85\u4e0b\u4e00\u6b65\u64cd\u4f5c\r\n\treturn 0;\t\t \/\/ \u7ed3\u675f\u8fd4\u56de\u503c\uff1a0\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"_links":{"self":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/352"}],"collection":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=352"}],"version-history":[{"count":0,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/352\/revisions"}],"wp:attachment":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=352"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}