{"id":20515,"date":"2024-03-15T20:35:45","date_gmt":"2024-03-15T20:35:45","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-determine-prime-numbers-in-the-c-programming-language\/"},"modified":"2024-03-21T18:16:32","modified_gmt":"2024-03-21T18:16:32","slug":"how-to-determine-prime-numbers-in-the-c-programming-language","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-determine-prime-numbers-in-the-c-programming-language\/","title":{"rendered":"How to determine prime numbers in the C programming language?"},"content":{"rendered":"<p>The common method of determining whether a number is a prime number is trial division. This involves dividing the number n by all integers from 2 to the square root of n. If n is evenly divisible by any of these numbers, then it is not a prime number; if n is not divisible by any of them, then it is a prime number.<\/p>\n<p>The specific implementation is as follows:<\/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-comment\">\/\/ \u5224\u65ad\u4e00\u4e2a\u6570\u662f\u5426\u4e3a\u7d20\u6570<\/span>\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">isPrime<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> n)<\/span> {\r\n    <span class=\"hljs-keyword\">if<\/span> (n &lt;= <span class=\"hljs-number\">1<\/span>) {\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n    }\r\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> i = <span class=\"hljs-number\">2<\/span>; i &lt;= <span class=\"hljs-built_in\">sqrt<\/span>(n); i++) {\r\n        <span class=\"hljs-keyword\">if<\/span> (n % i == <span class=\"hljs-number\">0<\/span>) {\r\n            <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n        }\r\n    }\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">1<\/span>;\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-type\">int<\/span> n;\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\uff1a\"<\/span>);\r\n    <span class=\"hljs-built_in\">scanf<\/span>(<span class=\"hljs-string\">\"%d\"<\/span>, &amp;n);\r\n    <span class=\"hljs-keyword\">if<\/span> (isPrime(n)) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"%d\u662f\u7d20\u6570\\n\"<\/span>, n);\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"%d\u4e0d\u662f\u7d20\u6570\\n\"<\/span>, n);\r\n    }\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>After running the program, input a number, and the program will determine if the number is a prime number and output the result.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The common method of determining whether a number is a prime number is trial division. This involves dividing the number n by all integers from 2 to the square root of n. If n is evenly divisible by any of these numbers, then it is not a prime number; if n is not divisible by [&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-20515","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 determine prime numbers in the C programming language? - 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-determine-prime-numbers-in-the-c-programming-language\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to determine prime numbers in the C programming language?\" \/>\n<meta property=\"og:description\" content=\"The common method of determining whether a number is a prime number is trial division. 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