{"id":208347,"date":"2025-07-08T15:41:38","date_gmt":"2025-07-08T07:41:38","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208347\/"},"modified":"2025-07-08T15:41:38","modified_gmt":"2025-07-08T07:41:38","slug":"%e5%a6%82%e4%bd%95%e7%94%a8golang%e8%8e%b7%e5%be%97%e5%b0%8f%e6%95%b0%e7%82%b9%e4%bb%a5%e4%b8%8b%e4%b8%a4%e4%bd%8d%e9%95%bf%e5%ba%a6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208347\/","title":{"rendered":"\u5982\u4f55\u7528golang\u83b7\u5f97\u5c0f\u6570\u70b9\u4ee5\u4e0b\u4e24\u4f4d\u957f\u5ea6\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u5982\u4f55\u7528golang\u83b7\u5f97\u5c0f\u6570\u70b9\u4ee5\u4e0b\u4e24\u4f4d\u957f\u5ea6\uff1f<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-05-02 08:54:31<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u76ee\u524d\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5982\u4f55\u7528golang\u83b7\u5f97\u5c0f\u6570\u70b9\u4ee5\u4e0b\u4e24\u4f4d\u957f\u5ea6\uff1f\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u4ece\u4e0b\u9762\u7684\u6e90\u4ee3\u7801\u4e2d\uff0c\u6211\u60f3\u83b7\u5f97\u6d6e\u70b9\u7c7b\u578b\u7ed3\u679c<code>33.33<\/code>\u3002 \u5982\u679c\u4f7f\u7528 <code>fmt.sprintf(\"%.2f\", v)<\/code> \u53ef\u4ee5\u5f88\u597d\u5730\u5de5\u4f5c\u3002\u4f46\u60f3\u5728<code>floattest<\/code>\u51fd\u6570\u4e2d\u5f97\u5230\u7ed3\u679c\u3002\u600e\u4e48\u529e\uff1f<\/p>\n<pre>func main() {\n        v := floatTest(30, 90)\n        fmt.Println(v)\n        \/\/ 33.33333333333333\n        vv := fmt.Sprintf(\"%.2f\", v)\n        fmt.Println(vv)\n        \/\/ 33.33\n}\n\nfunc floatTest(count float64, total float64) float64 {\n        return (count \/ total * 100)\n}<\/pre>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u4e58\u4ee5 100\uff1b\u901a\u8fc7 <code>int<\/code> \u8f6c\u6362\u622a\u65ad\uff1b\u8f6c\u6362\u56de float32 \u5e76\u9664\u4ee5 100\uff1a<\/p>\n<pre>func precision2(f float64) float64 {\n    return float64(int(f*100)) \/ 100\n}<\/pre>\n<\/p>\n<p>\u6b64 \u6709\u4f7f\u7528 <code>math<\/code> \u5305\u7684\u793a\u4f8b &#8211; \u4f46\u6211\u901a\u5e38\u4f1a\u5c3d\u91cf\u907f\u514d\u5305\u542b\u7528\u4e8e\u7410\u788e\u64cd\u4f5c\u7684\u5305\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208347","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208347"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208347\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}