{"id":29092,"date":"2023-01-05T10:00:08","date_gmt":"2023-01-05T04:30:08","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-repeating-an-input-till-it-is-answered-correct\/"},"modified":"2023-01-05T10:00:08","modified_gmt":"2023-01-05T04:30:08","slug":"solved-repeating-an-input-till-it-is-answered-correct","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-repeating-an-input-till-it-is-answered-correct\/","title":{"rendered":"[Solved] Repeating an Input till it is answered Correct"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-38409473\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"38409473\" data-parentid=\"38409402\" data-score=\"1\" 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<blockquote>\n<ul>\n<li>The computer must repeat the question till it recieves a valid response.<\/li>\n<li>It <em>(output)<\/em> goes like this indefinitely. <\/li>\n<\/ul>\n<\/blockquote>\n<p><strong>Reason :<\/strong><\/p>\n<ul>\n<li>The problem is that <strong>you are receiving input only once in your code<\/strong> and then entering into loop to check for the <code>age<\/code>. <\/li>\n<li>\n<p>since age value is not re-assigned after every iteration, if the first intput is <code>!=32767<\/code> it&#8217;s always wrong and <strong>enters into an infinite loop<\/strong> or also known as the <strong>odd loop<\/strong>.<\/p>\n<pre><code>scanf(\"%d\", &amp;age); \/\/scans only once\n\ndo \/\/enters loop\n{\n    if (age == 32767)\n    {\n        printf(\"Error, retry: \\n\");\n    }\n\n    else\n    {\n        printf(\"Cool.\");\n    }\n} while(age!=32767);\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<hr>\n<blockquote>\n<p>The if else statement is to catch the exception incase the user types something that is not an integer.<\/p>\n<\/blockquote>\n<ul>\n<li>\n<p><strong>No<\/strong>, <code>if (age == 32767)<\/code> would only check if the entered response was equal to <code>32767<\/code> or not.<\/p>\n<\/li>\n<li>\n<p>From <strong>@davmac<\/strong> &#8216;s comment , you can never check for an input value greater than the maximum value of the <code>int<\/code> variable.<\/p>\n<\/li>\n<li>\n<p>Instead it&#8217;d be better if you would assign a range this way<\/p>\n<pre><code> `if (age &gt; 100 || age &lt;0 )`\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<hr>\n<p><strong>Solution :<\/strong><\/p>\n<p>to avoid this scan <code>age<\/code> for every iteration and also see the changes I&#8217;ve done :<\/p>\n<pre><code>do{\n\n    printf(\"How old are you?\\n\");\n\n    if(scanf(\"%d\", &amp;age)==1) \/\/checking if scanf is successful or not\n    {\n\n        if (age &gt; 100 || age &lt;0 )\n        {\n            printf(\"Error, retry: \\n\");\n        }\n\n        else\n        {\n            printf(\"Cool.\");\n            break; \/\/break loop when correct value is entered\n        }\n    }\n\n    else \/\/if scanf is unsuccessful \n    {\n        char c;\n        printf(\"enter only integers\\n\");\n\n        do\n        {\n            scanf(\"%c\",&amp;c);\n        }while( c !='\\n' &amp;&amp; c!= EOF ); \/\/consuming characters\n    }\n\n}while(1); \/\/always true\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">8<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Repeating an Input till it is answered Correct <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] The computer must repeat the question till it recieves a valid response. It (output) goes like this indefinitely. Reason : The problem is that you are receiving input only once in your code and then entering into loop to check for the age. since age value is not re-assigned after every iteration, if the &#8230; <a title=\"[Solved] Repeating an Input till it is answered Correct\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-repeating-an-input-till-it-is-answered-correct\/\" aria-label=\"More on [Solved] Repeating an Input till it is answered Correct\">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":[324,1544,391],"class_list":["post-29092","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-conditional-statements","tag-loops"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Repeating an Input till it is answered Correct - 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-repeating-an-input-till-it-is-answered-correct\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Repeating an Input till it is answered Correct - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] The computer must repeat the question till it recieves a valid response. 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