{"id":15713,"date":"2024-03-15T11:37:23","date_gmt":"2024-03-15T11:37:23","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-the-rounding-of-a-number-to-one-decimal-place-in-the-c-language\/"},"modified":"2025-08-06T20:56:02","modified_gmt":"2025-08-06T20:56:02","slug":"how-to-achieve-the-rounding-of-a-number-to-one-decimal-place-in-the-c-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-achieve-the-rounding-of-a-number-to-one-decimal-place-in-the-c-language\/","title":{"rendered":"How to achieve the rounding of a number to one decimal &#8230;"},"content":{"rendered":"<p>In the C language, you can use the standard library function round() to achieve rounding to the nearest whole number while preserving one decimal point. The prototype of the round() function is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">double<\/span> <span class=\"hljs-title function_\">round<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">double<\/span> x)<\/span>;\r\n<\/code><\/pre>\n<p>The round() function rounds the parameter x to the nearest integer and returns the result. To keep one decimal place, you can multiply the number by 10, pass the result to the round() function for rounding, and then divide by 10 to get the result with one decimal place.<\/p>\n<p>Here is an example code:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;math.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-type\">double<\/span> num = <span class=\"hljs-number\">3.14<\/span>; <span class=\"hljs-comment\">\/\/ \u8981\u56db\u820d\u4e94\u5165\u7684\u6570<\/span>\r\n    <span class=\"hljs-type\">double<\/span> result = round(num * <span class=\"hljs-number\">10<\/span>) \/ <span class=\"hljs-number\">10<\/span>; <span class=\"hljs-comment\">\/\/ \u56db\u820d\u4e94\u5165\u5e76\u4fdd\u7559\u4e00\u4f4d\u5c0f\u6570<\/span>\r\n\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u539f\u59cb\u6570\uff1a%.2f\\n\"<\/span>, num);\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u56db\u820d\u4e94\u5165\u4fdd\u7559\u4e00\u4f4d\u5c0f\u6570\uff1a%.1f\\n\"<\/span>, result);\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>The output\/result of the operation is:<\/p>\n<pre class=\"post-pre\"><code>\u539f\u59cb\u6570\uff1a3.14\r\n\u56db\u820d\u4e94\u5165\u4fdd\u7559\u4e00\u4f4d\u5c0f\u6570\uff1a3.1\r\n<\/code><\/pre>\n<p>In this example, the original number is 3.14, and after rounding to one decimal place, it becomes 3.1.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the C language, you can use the standard library function round() to achieve rounding to the nearest whole number while preserving one decimal point. The prototype of the round() function is as follows: double round(double x); The round() function rounds the parameter x to the nearest integer and returns the result. To keep one [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[453,1402,299,1404,1403],"class_list":["post-15713","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-development","tag-guide","tag-programming","tag-technology","tag-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to achieve the rounding of a number to one decimal ... - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn about how to achieve the rounding of a number to one decimal place in the c language?. 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