{"id":290,"date":"2023-01-05T20:23:58","date_gmt":"2023-01-05T12:23:58","guid":{"rendered":"https:\/\/9iwd.top\/?p=290"},"modified":"2023-01-10T10:58:17","modified_gmt":"2023-01-10T02:58:17","slug":"02-3-%e6%b5%ae%e7%82%b9%e5%9e%8b","status":"publish","type":"post","link":"http:\/\/9iwd.top\/?p=290","title":{"rendered":"02.3 C++\u6d6e\u70b9\u578b"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>#include &lt;iostream>\/\/ \u8f93\u51fa\u6d41\u5e93\r\nusing namespace std;\/\/\u4f7f\u7528\u6807\u51c6\u547d\u540d\u7a7a\u95f4\r\n\r\n\/\/\u8bfe\u7a0b\uff1a2.3 \u6d6e\u70b9\u578b\r\n\/*\r\n\u7528\u4e8e\u8868\u793a\u5c0f\u6570\uff0c\u6d6e\u70b9\u578b\u53d8\u91cf\u5206\u4e3a\u4e24\u79cd\uff1a\r\n1\u3001\u5355\u7cbe\u5ea6 float  4\u5b57\u8282  7\u4f4d\u6709\u6548\u6570\u5b57\r\n2\u3001\u53cc\u7cbe\u5ea6 double  8\u5b57\u8282  15~16\u4f4d\u6709\u6548\u6570\u5b57\r\n\r\n*\/\r\n\r\nint main()\r\n{\r\n\tfloat f1 = 3.14f;\/\/\u5982\u679c\u540e\u9762\u6ca1\u52a0f \u9ed8\u8ba4\u4e3adouble\u518d\u8f6c\u6362\u4e3afloat\r\n\tdouble d1 = 3.14;\r\n\tcout &lt;&lt; \"f1\u7684\u5c0f\u6570\u4e3a\uff1a\" &lt;&lt; f1 &lt;&lt; endl;\r\n\tcout &lt;&lt; \"d1\u7684\u5c0f\u6570\u4e3a\uff1a\" &lt;&lt; d1 &lt;&lt; endl;\r\n\r\n\t\/\/\u53d6\u51fa\u7c7b\u578b\u957f\u5ea6\r\n\tcout &lt;&lt; \"f1\u957f\u5ea6\u4e3a\uff1a\" &lt;&lt; sizeof(f1) &lt;&lt; endl;\r\n\tcout &lt;&lt; \"d1\u957f\u5ea6\u4e3a\uff1a\" &lt;&lt; sizeof(d1) &lt;&lt; endl;\r\n\r\n\t\/\/\u79d1\u5b66\u8ba1\u7b97\r\n\tfloat f2 = 3e2;\r\n\tfloat f3 = 3e-2;\r\n\tcout &lt;&lt; \"f2\u7684\u5c0f\u6570\u4e3a\uff1a\" &lt;&lt; f2 &lt;&lt; endl;\r\n\tcout &lt;&lt; \"f3\u7684\u5c0f\u6570\u4e3a\uff1a\" &lt;&lt; f3 &lt;&lt; endl;\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;\/\/ \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\/290"}],"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=290"}],"version-history":[{"count":0,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/290\/revisions"}],"wp:attachment":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=290"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}