{"id":23693,"date":"2024-03-16T01:51:11","date_gmt":"2024-03-16T01:51:11","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-assign-and-output-values-in-a-c-language-union\/"},"modified":"2024-03-22T01:53:23","modified_gmt":"2024-03-22T01:53:23","slug":"how-to-assign-and-output-values-in-a-c-language-union","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-assign-and-output-values-in-a-c-language-union\/","title":{"rendered":"How to assign and output values in a C language union?"},"content":{"rendered":"<p> In C language, you can use the assignment operator (=) to assign values to union variables. The members of a union can be accessed using the dot operator (.).<\/p>\n<p>Here is an example demonstrating how to assign values and output a shared variable in the C language.<\/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-class\"><span class=\"hljs-keyword\">union<\/span> <span class=\"hljs-title\">MyUnion<\/span> {<\/span>\r\n    <span class=\"hljs-type\">int<\/span> num;\r\n    <span class=\"hljs-type\">char<\/span> ch;\r\n};\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-class\"><span class=\"hljs-keyword\">union<\/span> <span class=\"hljs-title\">MyUnion<\/span> <span class=\"hljs-title\">u<\/span>;<\/span>\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u7ed9\u5171\u7528\u4f53\u53d8\u91cf\u8d4b\u503c<\/span>\r\n    u.num = <span class=\"hljs-number\">65<\/span>;\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u8f93\u51fa\u5171\u7528\u4f53\u7684\u6210\u5458<\/span>\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"num = %d\\n\"<\/span>, u.num);\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"ch = %c\\n\"<\/span>, u.ch);\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>num = 65\r\nch = A\r\n<\/code><\/pre>\n<p>In this example, the union MyUnion has two members: num and ch. When we assign a value of 65 to num, the member ch in the union will also be assigned the corresponding ASCII character (in this case, the uppercase letter &#8220;A&#8221;). Because the members of the union share the same memory space, assigning a value to one member will affect the value of the other member.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In C language, you can use the assignment operator (=) to assign values to union variables. The members of a union can be accessed using the dot operator (.). Here is an example demonstrating how to assign values and output a shared variable in the C language. #include &lt;stdio.h&gt; union MyUnion { int num; char [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-23693","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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 assign and output values in a C language union? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-assign-and-output-values-in-a-c-language-union\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to assign and output values in a C language union?\" \/>\n<meta property=\"og:description\" content=\"In C language, you can use the assignment operator (=) to assign values to union variables. The members of a union can be accessed using the dot operator (.). 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