{"id":2006,"date":"2024-03-12T09:03:58","date_gmt":"2024-03-12T09:03:58","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-retain-significant-figures-in-c\/"},"modified":"2024-03-25T14:29:40","modified_gmt":"2024-03-25T14:29:40","slug":"how-to-retain-significant-figures-in-c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-retain-significant-figures-in-c\/","title":{"rendered":"How to retain significant figures in C++?"},"content":{"rendered":"<p>One way to preserve the significant digits in <a href=\"https:\/\/en.wikipedia.org\/wiki\/C%2B%2B\">C++<\/a> is to use the std::setprecision() function. This function is defined in the header file and is used to set the significant digits of floating-point numbers.<\/p>\n<p>Here is a sample code:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iomanip&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    <span class=\"hljs-type\">double<\/span> number = <span class=\"hljs-number\">12.3456789<\/span>;\r\n    \r\n    std::cout &lt;&lt; std::<span class=\"hljs-built_in\">setprecision<\/span>(<span class=\"hljs-number\">4<\/span>) &lt;&lt; number &lt;&lt; std::endl;\r\n    \r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>In the above code, std::setprecision(4) sets the number of significant figures to 4, resulting in an output of 12.35. You can modify the parameter in the setprecision() function to set a different number of significant figures as needed.<\/p>\n<p>&nbsp;<\/p>\n<p>More tutorials<\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-is-the-string-format-used-in-c\/\" target=\"_blank\" rel=\"noopener\">How is the string format used in C++?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/c-implementation-of-a-2d-array\/\" target=\"_blank\" rel=\"noopener\">2D array for C++ implementation<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/converting-a-c-string-to-uppercase-and-lowercase\/\" target=\"_blank\" rel=\"noopener\">Converting a C++ string to uppercase and lowercase.<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-include-items-to-a-list-in-python\/\" target=\"_blank\" rel=\"noopener\">How to include items to a list in Python<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/spring-rest-xml-and-json\/\" target=\"_blank\" rel=\"noopener\">One example of Spring REST XML and JSON<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/interview-questions-and-answers-specifically-about-android\/\" target=\"_blank\" rel=\"noopener\">Interview Questions and Answers specifically about Android<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n<p><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 cLBplk\" href=\"https:\/\/www.silicloud.com\/blog\/what-is-the-difference-between-closures-and-anonymous-functions-in-python\/\" target=\"_blank\" rel=\"noopener\">What is the difference between closures and anonymous functions in Python?<span class=\"sc-gswNZR eASTkv\">(Opens in a new browser tab)<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>One way to preserve the significant digits in C++ is to use the std::setprecision() function. This function is defined in the header file and is used to set the significant digits of floating-point numbers. Here is a sample code: #include &lt;iostream&gt; #include &lt;iomanip&gt; int main() { double number = 12.3456789; std::cout &lt;&lt; std::setprecision(4) &lt;&lt; number [&hellip;]<\/p>\n","protected":false},"author":10,"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-2006","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 retain significant figures in C++? - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"One way to preserve the significant digits in C++ is to use the std::setprecision() function. 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