{"id":4907,"date":"2022-08-25T02:17:17","date_gmt":"2022-08-24T20:47:17","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-comparison-inside-while-loop-c\/"},"modified":"2022-08-25T02:17:17","modified_gmt":"2022-08-24T20:47:17","slug":"solved-comparison-inside-while-loop-c","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-comparison-inside-while-loop-c\/","title":{"rendered":"[Solved] Comparison inside while loop c++"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-50005555\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"50005555\" data-parentid=\"50005390\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Use <code>==<\/code> not <code>=<\/code><\/p>\n<pre><code>if (num == 1) {\n    system(\"start C:\\\\test\\\\vw\");\n    Sleep(2000);\n}\nelse if (num == 2) {\n    system(\"start C:\\\\test\\\\vw2\");\n    Sleep(2300);\n}\nelse if (num == 3) {\n    system(\"start C:\\\\test\\\\vw3\");\n    Sleep(1800);\n}\n<\/code><\/pre>\n<p><code>==<\/code> is for comparison, <code>=<\/code> is for assignment<\/p>\n<hr>\n<p>The reason why it always chooses the first option is because <code>C++<\/code> (and <code>C<\/code>) has the notion of <code>truthy<\/code> values. So any value that is not <code>0<\/code> is considered truthy, whereas values that evaluate to 0 are considered <code>falsy<\/code>.<\/p>\n<p>In your original code, when you assign <code>num<\/code> to <code>1<\/code>, the value of <code>num<\/code> is truthy, therefore that branch is always taken<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">2<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Comparison inside while loop c++ <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Use == not = if (num == 1) { system(&#8220;start C:\\\\test\\\\vw&#8221;); Sleep(2000); } else if (num == 2) { system(&#8220;start C:\\\\test\\\\vw2&#8221;); Sleep(2300); } else if (num == 3) { system(&#8220;start C:\\\\test\\\\vw3&#8221;); Sleep(1800); } == is for comparison, = is for assignment The reason why it always chooses the first option is because C++ (and &#8230; <a title=\"[Solved] Comparison inside while loop c++\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-comparison-inside-while-loop-c\/\" aria-label=\"More on [Solved] Comparison inside while loop c++\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,639,459],"class_list":["post-4907","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-if-statement","tag-while-loop"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Comparison inside while loop c++ - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-comparison-inside-while-loop-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Comparison inside while loop c++ - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Use == not = if (num == 1) { system(&quot;start C:\\test\\vw&quot;); Sleep(2000); } else if (num == 2) { system(&quot;start C:\\test\\vw2&quot;); Sleep(2300); } else if (num == 3) { system(&quot;start C:\\test\\vw3&quot;); Sleep(1800); } == is for comparison, = is for assignment The reason why it always chooses the first option is because C++ (and ... 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