{"id":15595,"date":"2024-03-15T11:26:47","date_gmt":"2024-03-15T11:26:47","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-you-convert-date-formats-in-the-c-programming-language\/"},"modified":"2025-08-06T19:56:35","modified_gmt":"2025-08-06T19:56:35","slug":"how-can-you-convert-date-formats-in-the-c-programming-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-you-convert-date-formats-in-the-c-programming-language\/","title":{"rendered":"How can you convert date formats in the C programming l&#8230;"},"content":{"rendered":"<p>In C language, you can use the strftime function to convert date formats. The prototype of the strftime function is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">size_t<\/span> <span class=\"hljs-title function_\">strftime<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">char<\/span> *str, <span class=\"hljs-type\">size_t<\/span> maxsize, <span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span> *format, <span class=\"hljs-type\">const<\/span> <span class=\"hljs-keyword\">struct<\/span> tm *timeptr)<\/span>;\r\n<\/code><\/pre>\n<p>Explanation of parameters:<\/p>\n<ol>\n<li>str: pointer to a string for storing the conversion result.<\/li>\n<li>maximum size: the maximum length of the string pointed to by str.<\/li>\n<li>String for changing format.<\/li>\n<li>timeptr: pointer to a tm structure, indicating the date and time to be converted.<\/li>\n<\/ol>\n<p>Below is an example of converting the current date and time into a specified format string:<\/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;stdlib.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;time.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\">time_t<\/span> rawtime;\r\n    <span class=\"hljs-class\"><span class=\"hljs-keyword\">struct<\/span> <span class=\"hljs-title\">tm<\/span> *<span class=\"hljs-title\">timeinfo<\/span>;<\/span>\r\n    <span class=\"hljs-type\">char<\/span> buffer[<span class=\"hljs-number\">80<\/span>];\r\n\r\n    time(&amp;rawtime);\r\n    timeinfo = localtime(&amp;rawtime);\r\n\r\n    strftime(buffer, <span class=\"hljs-keyword\">sizeof<\/span>(buffer), <span class=\"hljs-string\">\"%Y-%m-%d %H:%M:%S\"<\/span>, timeinfo);\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Formatted date and time: %s\\n\"<\/span>, buffer);\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>Output: result<\/p>\n<pre class=\"post-pre\"><code>Formatted date and time: 2022-01-01 12:34:56\r\n<\/code><\/pre>\n<p>Different format specifiers can be used in the third parameter of the strftime function to define various date and time formats. For example, %Y represents a four-digit year, %m represents a two-digit month, %d represents a two-digit day, %H represents hours in 24-hour format, %M represents minutes, %S represents seconds. More detailed format specifiers can be found in the relevant documentation for the C language.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In C language, you can use the strftime function to convert date formats. The prototype of the strftime function is as follows: size_t strftime(char *str, size_t maxsize, const char *format, const struct tm *timeptr); Explanation of parameters: str: pointer to a string for storing the conversion result. maximum size: the maximum length of the string [&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-15595","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 can you convert date formats in the C programming l... - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn about how can you convert date formats in the c programming language?. 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