{"id":343,"date":"2023-01-11T22:26:43","date_gmt":"2023-01-11T14:26:43","guid":{"rendered":"https:\/\/9iwd.top\/?p=343"},"modified":"2023-01-11T22:26:43","modified_gmt":"2023-01-11T14:26:43","slug":"08-4-cconst%e4%bf%ae%e9%a5%b0%e6%8c%87%e9%92%88","status":"publish","type":"post","link":"http:\/\/9iwd.top\/?p=343","title":{"rendered":"08.4 C++const\u4fee\u9970\u6307\u9488"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>#include &lt;iostream>\t \/\/ \u8f93\u51fa\u6d41\u5e93\r\nusing namespace std; \/\/ \u4f7f\u7528\u6807\u51c6\u547d\u540d\u7a7a\u95f4\r\n\r\n\/\/ \u8bfe\u7a0b\uff1a08.4 const\u4fee\u9970\u6307\u9488\r\n\r\n\/*\r\n1\u3001const\u4fee\u9970\u6307\u9488 ---\u5e38\u91cf\u6307\u9488\r\n2\u3001const\u4fee\u9970\u5e38\u91cf ---\u6307\u9488\u5e38\u91cf\r\n3\u3001const\u65e2\u4fee\u9970\u6307\u9488\uff0c\u53c8\u4fee\u9970\u5e38\u91cf\r\n*\/\r\nint main()\r\n{\r\n\tint a = 10;\r\n\tint b = 15;\r\n\r\n\t\/\/1\u3001const\u4fee\u9970\u6307\u9488 ---\u5e38\u91cf\u6307\u9488\r\n\tconst int * p1 = &amp;a;\r\n\t\/\/\u5e38\u91cf\u6307\u9488\r\n\t\/\/\u7279\u70b9\uff1a\u6307\u9488\u7684\u6307\u5411\u53ef\u4ee5\u4fee\u6539\uff0c\u4f46\u662f\u6307\u9488\u6307\u5411\u7684\u503c\u4e0d\u80fd\u4fee\u6539\r\n\t\/\/*p1 = 20;\/\/\u9519\u8bef\uff0c\u6307\u9488\u6307\u5411\u7684\u503c\u4e0d\u53ef\u4ee5\u4fee\u6539\r\n\tp1 = &amp;b;\/\/\u6b63\u786e\uff0c\u6307\u9488\u6307\u5411\u53ef\u4ee5\u6539\r\n\r\n\r\n\t\/\/2\u3001const\u4fee\u9970\u5e38\u91cf ---\u6307\u9488\u5e38\u91cf\r\n\tint* const p2 = &amp;a;\r\n\t\/\/\u6307\u9488\u5e38\u91cf\r\n\t\/\/\u7279\u70b9\uff1a\u6307\u9488\u7684\u6307\u5411\u4e0d\u53ef\u4ee5\u6539\uff0c\u6307\u9488\u6307\u5411\u7684\u503c\u53ef\u4ee5\u6539\r\n\t*p2 = 20;\/\/ \u6b63\u786e\uff0c\u6307\u9488\u6307\u5411\u7684\u503c\u53ef\u4ee5\u6539\u3002\r\n\t\/\/p2 = &amp;b;\/\/\u9519\u8bef\uff0c\u6307\u9488\u6307\u5411\u4e0d\u53ef\u4ee5\u6539\r\n\r\n\r\n\t\/\/3\u3001const\u65e2\u4fee\u9970\u6307\u9488\uff0c\u53c8\u4fee\u9970\u5e38\u91cf\r\n\tconst int* p3 = &amp;a;\r\n\t\/\/\u7279\u70b9\uff1a\u6307\u9488\u7684\u6307\u5411\u548c\u6307\u9488\u6307\u5411\u7684\u503c\u90fd\u4e0d\u53ef\u4ee5\u4fee\u6539\r\n\r\n\t\/\/*p3 = 20;\/\/\u9519\u8bef\r\n\t\/\/p3 = &amp;b;\/\/\u9519\u8bef\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\/343"}],"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=343"}],"version-history":[{"count":0,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/343\/revisions"}],"wp:attachment":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=343"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}