{"id":8795,"date":"2024-03-14T08:40:39","date_gmt":"2024-03-14T08:40:39","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-do-you-declare-a-global-variable-in-c-language\/"},"modified":"2025-08-03T09:44:08","modified_gmt":"2025-08-03T09:44:08","slug":"how-do-you-declare-a-global-variable-in-c-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-do-you-declare-a-global-variable-in-c-language\/","title":{"rendered":"C Global Variable Declaration"},"content":{"rendered":"<p>In C language, global variables can be defined at any position outside of functions, as shown below:<\/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\r\n<span class=\"hljs-type\">int<\/span> globalVariable; <span class=\"hljs-comment\">\/\/ \u5b9a\u4e49\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf<\/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    globalVariable = <span class=\"hljs-number\">10<\/span>; <span class=\"hljs-comment\">\/\/ \u5168\u5c40\u53d8\u91cf\u8d4b\u503c<\/span>\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Global variable value: %d\\n\"<\/span>, globalVariable); <span class=\"hljs-comment\">\/\/ \u8f93\u51fa\u5168\u5c40\u53d8\u91cf\u7684\u503c<\/span>\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>In the example above, globalVariable is defined as a global variable, which can be accessed and assigned values at any location in the program. Generally, global variables are defined outside of functions and can be accessed by any function within the program.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In C language, global variables can be defined at any position outside of functions, as shown below: #include &lt;stdio.h&gt; int globalVariable; \/\/ \u5b9a\u4e49\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf int main() { globalVariable = 10; \/\/ \u5168\u5c40\u53d8\u91cf\u8d4b\u503c printf(&#8220;Global variable value: %d\\n&#8221;, globalVariable); \/\/ \u8f93\u51fa\u5168\u5c40\u53d8\u91cf\u7684\u503c return 0; } In the example above, globalVariable is defined as a global variable, which can be [&hellip;]<\/p>\n","protected":false},"author":6,"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":[331,381,5246,9733,2020],"class_list":["post-8795","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-language","tag-c-programming","tag-coding-basics","tag-global-variables","tag-variable-declaration"],"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>C Global Variable Declaration - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to declare global variables in C programming. 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