{"id":65911,"date":"2023-12-14T09:33:08","date_gmt":"2023-12-14T01:33:08","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=65911"},"modified":"2023-12-14T09:33:21","modified_gmt":"2023-12-14T01:33:21","slug":"double%e5%92%8cfloat%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/65911.html","title":{"rendered":"double\u548cfloat\u7684\u533a\u522b"},"content":{"rendered":"\n
\n

\u5728\u8ba1\u7b97\u673a\u7f16\u7a0b\u4e2d\uff0cdouble\u548cfloat\u662f\u4e24\u79cd\u7528\u4e8e\u8868\u793a\u6d6e\u70b9\u6570\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f46\u5b83\u4eec\u5728\u7cbe\u5ea6\u3001\u5185\u5b58\u5360\u7528\u548c\u9002\u7528\u573a\u666f\u7b49\u65b9\u9762\u5b58\u5728\u663e\u8457\u7684\u533a\u522b\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8double\u548cfloat\u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u4ee5\u5e2e\u52a9\u7a0b\u5e8f\u5458\u66f4\u597d\u5730\u7406\u89e3\u4f55\u65f6\u4f7f\u7528\u54ea\u79cd\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<\/blockquote>\n\n\n\n

1.<\/strong>\u4ec0\u4e48\u662fdouble\u548cfloat\uff1f<\/strong><\/h2>\n\n\n\n

double\u548cfloat\u90fd\u662f\u7528\u4e8e\u5b58\u50a8\u6d6e\u70b9\u6570\uff08\u5e26\u6709\u5c0f\u6570\u70b9\u7684\u6570\u5b57\uff09\u7684\u6570\u636e\u7c7b\u578b\u3002<\/p>\n\n\n\n

double\u662f\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u7684\u7f29\u5199\uff0c\u5360\u752864\u4f4d\uff0c\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\u3002<\/p>\n\n\n\n

float\u662f\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u7684\u7f29\u5199\uff0c\u5360\u752832\u4f4d\uff0c\u7cbe\u5ea6\u8f83\u4f4e\u3002<\/p>\n\n\n\n

2.<\/strong>\u7cbe\u5ea6\u4e0d\u540c<\/strong><\/h2>\n\n\n\n

double\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\uff0c\u901a\u5e38\u7528\u4e8e\u9700\u8981\u9ad8\u5ea6\u7cbe\u786e\u8ba1\u7b97\u7684\u60c5\u51b5\uff0c\u5982\u79d1\u5b66\u8ba1\u7b97\u3001\u91d1\u878d\u5e94\u7528\u548c\u5de5\u7a0b\u8ba1\u7b97\u3002<\/p>\n\n\n\n

float\u7684\u7cbe\u5ea6\u8f83\u4f4e\uff0c\u9002\u7528\u4e8e\u4e0d\u8981\u6c42\u6781\u9ad8\u7cbe\u5ea6\u7684\u5e94\u7528\uff0c\u5982\u6e38\u620f\u5f00\u53d1\u548c\u56fe\u5f62\u5904\u7406\u3002<\/p>\n\n\n\n

3.<\/strong>\u5185\u5b58\u5360\u7528\u4e0d\u540c<\/strong><\/h2>\n\n\n\n

double\u5360\u7528\u66f4\u591a\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u56e0\u4e3a\u5b83\u9700\u898164\u4f4d\u6765\u5b58\u50a8\u6570\u636e\u3002<\/p>\n\n\n\n

float\u5360\u7528\u8f83\u5c11\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u56e0\u4e3a\u5b83\u53ea\u9700\u898132\u4f4d\u3002<\/p>\n\n\n\n

4.<\/strong>\u8fd0\u7b97\u901f\u5ea6\u4e0d\u540c<\/strong><\/h2>\n\n\n\n

\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0cfloat\u53ef\u80fd\u6bd4double\u66f4\u5feb\uff0c\u56e0\u4e3a\u5b83\u5360\u7528\u66f4\u5c11\u7684\u5185\u5b58\u548c\u5904\u7406\u5668\u8d44\u6e90\u3002<\/p>\n\n\n\n

\u4f46\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u7684\u60c5\u51b5\u4e0b\uff0cdouble\u901a\u5e38\u66f4\u53ef\u9760\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u5904\u7406\u66f4\u5927\u8303\u56f4\u7684\u6570\u5b57\u548c\u66f4\u590d\u6742\u7684\u8ba1\u7b97\u3002<\/p>\n\n\n\n

5.<\/strong>\u9002\u7528\u573a\u666f\u4e0d\u540c<\/strong><\/h2>\n\n\n\n

\u5982\u679c\u60a8\u9700\u8981\u8fdb\u884c\u79d1\u5b66\u7814\u7a76\u3001\u91d1\u878d\u5efa\u6a21\u6216\u5176\u4ed6\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u7684\u4efb\u52a1\uff0c\u5e94\u9009\u62e9double\u3002<\/p>\n\n\n\n

\u5982\u679c\u60a8\u5728\u5f00\u53d1\u56fe\u5f62\u5e94\u7528\u7a0b\u5e8f\u3001\u6e38\u620f\u6216\u5176\u4ed6\u4e0d\u592a\u4f9d\u8d56\u7cbe\u786e\u6d6e\u70b9\u8ba1\u7b97\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528float\u4ee5\u51cf\u5c11\u5185\u5b58\u5360\u7528\u3002<\/p>\n\n\n\n

\"double\u548cfloat\u7684\u533a\u522b\"<\/p>\n\n\n\n

\u5e38\u89c1\u95ee\u7b54<\/strong><\/h2>\n\n\n\n

1.double<\/strong>\u548cfloat\u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n\n\n\n

\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u5b83\u4eec\u7684\u7cbe\u5ea6\u548c\u5b58\u50a8\u7a7a\u95f4\u3002double\u662f\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff0c\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\u548c\u5b58\u50a8\u7a7a\u95f4\uff0c\u901a\u5e38\u4f7f\u752864\u4f4d\u6765\u8868\u793a\uff0c\u800cfloat\u662f\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff0c\u63d0\u4f9b\u8f83\u4f4e\u7684\u7cbe\u5ea6\u548c\u5b58\u50a8\u7a7a\u95f4\uff0c\u901a\u5e38\u4f7f\u752832\u4f4d\u8868\u793a\u3002<\/p>\n\n\n\n

2.<\/strong>\u4ec0\u4e48\u65f6\u5019\u5e94\u8be5\u4f7f\u7528double\uff0c\u800c\u4e0d\u662ffloat\uff1f<\/strong><\/p>\n\n\n\n

\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u7684\u6570\u503c\u7cbe\u5ea6\uff0c\u6216\u8005\u5904\u7406\u7684\u6570\u5b57\u9700\u8981\u66f4\u5927\u7684\u8303\u56f4\uff0c\u901a\u5e38\u5e94\u8be5\u4f7f\u7528double\u3002\u4f8b\u5982\uff0c\u5728\u79d1\u5b66\u8ba1\u7b97\u3001\u5de5\u7a0b\u5e94\u7528\u548c\u91d1\u878d\u9886\u57df\uff0c\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u901a\u5e38\u66f4\u4e3a\u9002\u7528\u3002<\/p>\n\n\n\n

3.<\/strong>\u4ec0\u4e48\u65f6\u5019\u5e94\u8be5\u4f7f\u7528float\uff1f<\/strong><\/p>\n\n\n\n

\u5982\u679c\u5185\u5b58\u5360\u7528\u548c\u6027\u80fd\u662f\u5173\u952e\u56e0\u7d20\uff0c\u800c\u7cbe\u5ea6\u8981\u6c42\u76f8\u5bf9\u8f83\u4f4e\uff0c\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528float\u3002\u5728\u56fe\u5f62\u5904\u7406\u548c\u5d4c\u5165\u5f0f\u7cfb\u7edf\u7b49\u9886\u57df\uff0cfloat\u901a\u5e38\u8db3\u591f\u6ee1\u8db3\u9700\u6c42\u3002<\/p>\n\n\n\n

4.double<\/strong>\u548cfloat\u5728\u8ba1\u7b97\u673a\u5185\u90e8\u5982\u4f55\u8868\u793a\uff1f<\/strong><\/p>\n\n\n\n

double\u4f7f\u752864\u4f4d\u6765\u8868\u793a\u6d6e\u70b9\u6570\uff0c\u5176\u4e2d\u4e00\u90e8\u5206\u7528\u4e8e\u6307\u6570\u90e8\u5206\uff0c\u4e00\u90e8\u5206\u7528\u4e8e\u5c0f\u6570\u90e8\u5206\u3002float\u4f7f\u752832\u4f4d\u8868\u793a\uff0c\u540c\u6837\u5305\u542b\u6307\u6570\u548c\u5c0f\u6570\u90e8\u5206\u3002\u8fd9\u79cd\u4e8c\u8fdb\u5236\u8868\u793a\u5141\u8bb8\u8ba1\u7b97\u673a\u5728\u786c\u4ef6\u5c42\u9762\u6267\u884c\u6d6e\u70b9\u6570\u8fd0\u7b97\u3002<\/p>\n\n\n\n

5.<\/strong>\u662f\u5426\u53ef\u4ee5\u968f\u610f\u5728double\u548cfloat\u4e4b\u95f4\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\uff1f<\/strong><\/p>\n\n\n\n

\u53ef\u4ee5\u8fdb\u884cdouble\u5230float\u7684\u7c7b\u578b\u8f6c\u6362\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u7cbe\u5ea6\u4e22\u5931\u7684\u95ee\u9898\u3002\u5c06double\u8f6c\u6362\u4e3afloat\u53ef\u80fd\u4f1a\u5bfc\u81f4\u820d\u5165\u8bef\u5dee\u548c\u7cbe\u5ea6\u635f\u5931\u3002\u53cd\u4e4b\u4ea6\u7136\uff0c\u5c06float\u8f6c\u6362\u4e3adouble\u4e0d\u4f1a\u5f15\u5165\u989d\u5916\u7684\u7cbe\u5ea6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728\u8ba1\u7b97\u673a\u7f16\u7a0b\u4e2d\uff0cdouble\u548cfloat\u662f\u4e24\u79cd\u7528\u4e8e\u8868\u793a\u6d6e\u70b9\u6570\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f46\u5b83\u4eec\u5728\u7cbe\u5ea6\u3001\u5185\u5b58\u5360\u7528\u548c\u9002\u7528\u573a\u666f\u7b49\u65b9\u9762 […]","protected":false},"author":5,"featured_media":65916,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/65911"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=65911"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/65911\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/65916"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=65911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=65911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=65911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}