{"id":10649,"date":"2024-03-14T12:29:19","date_gmt":"2024-03-14T12:29:19","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-implement-a-program-in-c-language-to-find-the-roots-of-a-quadratic-equation\/"},"modified":"2025-08-04T02:09:24","modified_gmt":"2025-08-04T02:09:24","slug":"how-to-implement-a-program-in-c-language-to-find-the-roots-of-a-quadratic-equation","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-implement-a-program-in-c-language-to-find-the-roots-of-a-quadratic-equation\/","title":{"rendered":"C Program: Quadratic Equation Roots"},"content":{"rendered":"<p>Here is a C program for finding the roots of a quadratic equation.<\/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> a, b, c;\r\n    <span class=\"hljs-type\">double<\/span> discriminant, root1, root2;\r\n\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u8bf7\u8f93\u5165\u4e00\u5143\u4e8c\u6b21\u65b9\u7a0b\u7684\u7cfb\u6570 a, b, c: \"<\/span>);\r\n    <span class=\"hljs-built_in\">scanf<\/span>(<span class=\"hljs-string\">\"%lf %lf %lf\"<\/span>, &amp;a, &amp;b, &amp;c);\r\n\r\n    discriminant = b * b - <span class=\"hljs-number\">4<\/span> * a * c;\r\n\r\n    <span class=\"hljs-keyword\">if<\/span> (discriminant &gt; <span class=\"hljs-number\">0<\/span>) {\r\n        root1 = (-b + <span class=\"hljs-built_in\">sqrt<\/span>(discriminant)) \/ (<span class=\"hljs-number\">2<\/span> * a);\r\n        root2 = (-b - <span class=\"hljs-built_in\">sqrt<\/span>(discriminant)) \/ (<span class=\"hljs-number\">2<\/span> * a);\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u65b9\u7a0b\u7684\u4e24\u4e2a\u5b9e\u6839\u5206\u522b\u4e3a: %.2f \u548c %.2f\\n\"<\/span>, root1, root2);\r\n    } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span> (discriminant == <span class=\"hljs-number\">0<\/span>) {\r\n        root1 = -b \/ (<span class=\"hljs-number\">2<\/span> * a);\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u65b9\u7a0b\u6709\u4e00\u4e2a\u91cd\u6839: %.2f\\n\"<\/span>, root1);\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        <span class=\"hljs-type\">double<\/span> realPart = -b \/ (<span class=\"hljs-number\">2<\/span> * a);\r\n        <span class=\"hljs-type\">double<\/span> imaginaryPart = <span class=\"hljs-built_in\">sqrt<\/span>(-discriminant) \/ (<span class=\"hljs-number\">2<\/span> * a);\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u65b9\u7a0b\u6709\u4e24\u4e2a\u865a\u6839: %.2f + %.2fi \u548c %.2f - %.2fi\\n\"<\/span>, realPart, imaginaryPart, realPart, imaginaryPart);\r\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>Users can input the coefficients of a quadratic equation, and the program will calculate the roots of the equation based on the input coefficients and output them to the console.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here is a C program for finding the roots of a quadratic equation. #include &lt;stdio.h&gt; #include &lt;math.h&gt; int main() { double a, b, c; double discriminant, root1, root2; printf(&#8220;\u8bf7\u8f93\u5165\u4e00\u5143\u4e8c\u6b21\u65b9\u7a0b\u7684\u7cfb\u6570 a, b, c: &#8220;); scanf(&#8220;%lf %lf %lf&#8221;, &amp;a, &amp;b, &amp;c); discriminant = b * b &#8211; 4 * a * c; if (discriminant &gt; 0) { [&hellip;]<\/p>\n","protected":false},"author":14,"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":[381,13398,799,13396,13397],"class_list":["post-10649","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-programming","tag-math-in-c","tag-programming-tutorial","tag-quadratic-equation","tag-roots-calculation"],"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 Program: Quadratic Equation Roots - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to write a C program to find roots of quadratic equations. 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