{"id":20774,"date":"2022-11-10T21:34:08","date_gmt":"2022-11-10T16:04:08","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-using-fuctions-in-c\/"},"modified":"2022-11-10T21:34:08","modified_gmt":"2022-11-10T16:04:08","slug":"solved-using-fuctions-in-c","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-using-fuctions-in-c\/","title":{"rendered":"[Solved] Using fuctions in C"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-26691183\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"26691183\" data-parentid=\"26690914\" data-score=\"2\" 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>If you simply want to call the <code>IsRectangle()<\/code> function, just add the following code between the <code>next:<\/code> and <code>}<\/code> lines:<\/p>\n<pre><code>if (IsRectangle(x1, y1, x2, y2, x3, y3, x4, y4))\n{\n  printf(\"The points define a rectangle.\\n\");\n}\nelse\n{\n  printf(\"The points do NOT define a rectangle.\\n\");\n}\n<\/code><\/pre>\n<p>However, as others have pointed out, there are a few other problems with your code:<\/p>\n<ul>\n<li>There is no <code>return<\/code> statement in your <code>main()<\/code> function &#8211; it should return an <code>int<\/code> as specifed in the declaration. More specifically, it should return zero to indicate that the program ended without problems.<\/li>\n<li>The <code>goto<\/code> statements aren&#8217;t doing anything to protect against invalid entries. The <code>else<\/code> code sections will cause <code>printf(\"Invalid Entry\\n\");<\/code> to be triggered, but the code will then continue on to the next section anyway. Also, <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.u.arizona.edu\/~rubinson\/copyright_violations\/Go_To_Considered_Harmful.html\">GOTO statements make Edsger W. Dijkstra sad<\/a>.<\/li>\n<li>You&#8217;ve got almost the exact same code copy-pasted four times, one for each point. <\/li>\n<\/ul>\n<p>I&#8217;d recommend re-factoring your &#8220;point input&#8221; code into a <code>for<\/code> loop, with the x\/y values stored in arrays for simplicity:<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n\nint main(int argc, char *argv[])\n{\n\n    int x[4];\n    int y[4];\n    int i;\n\n    for (i = 0; i &lt; 4; ++i)\n    {\n        printf(\"Please enter point %d: \", i+1);\n        while (scanf(\"%d %d\", &amp;x[i], &amp;y[i]) != 2)\n        {\n            printf(\"Invalid point, try again: \");\n            while (getchar() != '\\n') { \/* Wait until RETURN is pressed. *\/ }\n        }\n    }\n\n    return 0;\n\n}\n<\/code><\/pre>\n<p>Alternatively, you could move the input logic into a separate function that is then called four times by <code>main()<\/code> to get each point.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Using fuctions in C <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] If you simply want to call the IsRectangle() function, just add the following code between the next: and } lines: if (IsRectangle(x1, y1, x2, y2, x3, y3, x4, y4)) { printf(&#8220;The points define a rectangle.\\n&#8221;); } else { printf(&#8220;The points do NOT define a rectangle.\\n&#8221;); } However, as others have pointed out, there are &#8230; <a title=\"[Solved] Using fuctions in C\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-using-fuctions-in-c\/\" aria-label=\"More on [Solved] Using fuctions in 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],"class_list":["post-20774","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Using fuctions in 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-using-fuctions-in-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Using fuctions in C - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] If you simply want to call the IsRectangle() function, just add the following code between the next: and } lines: if (IsRectangle(x1, y1, x2, y2, x3, y3, x4, y4)) { printf(&quot;The points define a rectangle.n&quot;); } else { printf(&quot;The points do NOT define a rectangle.n&quot;); } However, as others have pointed out, there are ... 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