{"id":14378,"date":"2022-10-07T15:06:05","date_gmt":"2022-10-07T09:36:05","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-recursion-doesnt-do-what-its-supposed-to-be-doing\/"},"modified":"2022-10-07T15:06:05","modified_gmt":"2022-10-07T09:36:05","slug":"solved-recursion-doesnt-do-what-its-supposed-to-be-doing","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-recursion-doesnt-do-what-its-supposed-to-be-doing\/","title":{"rendered":"[Solved] Recursion doesn&#8217;t do what its supposed to be doing"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-38282600\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"38282600\" data-parentid=\"38282376\" 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<p>Let&#8217;s step through your code<\/p>\n<pre><code>static void Main(string[] args)\n    {\n        int input = 7;\n        int zeroes = 0;\n\n        List&lt;int&gt; myList = ATM(input);\n<\/code><\/pre>\n<blockquote>\n<p>mylist =&gt; <code>[3,2,1]<\/code><\/p>\n<\/blockquote>\n<pre><code>        foreach(var number in myList.ToArray())\n        {\n            if (number != 0)\n            {\n                myList.AddRange(ATM(number));\n            }\n            else\n            {\n                continue;\n            }\n<\/code><\/pre>\n<blockquote>\n<ul>\n<li>after 3 mylist =&gt; <code>[3,2,1,1,1,0]<\/code><\/li>\n<li>after 2 mylist =&gt; <code>[3,2,1,1,1,0,1,0,0]<\/code><\/li>\n<li>after 1 mylist =&gt; <code>[3,2,1,1,1,0,1,0,0,0,0,0]<\/code><\/li>\n<\/ul>\n<\/blockquote>\n<pre><code>        }\n<\/code><\/pre>\n<blockquote>\n<p>count the zeros by hand &#8230; and you see 6 zeros<\/p>\n<\/blockquote>\n<pre><code>        foreach (var zero in myList)\n        {\n            if (zero == 0)\n            {\n                zeroes += 1;\n            }\n        }\n\n        Console.WriteLine(zeroes);\n        Console.ReadKey();\n\n\n        Console.ReadKey();\n    }\n\n    static List&lt;int&gt; ATM(int value)\n    {\n        List&lt;int&gt; exchangeCoins = new List&lt;int&gt;();\n\n        if (value != 0)\n        {                                 \/\/ 7 3 2 1\n            exchangeCoins.Add(value \/ 2); \/\/ 3 1 1 0\n            exchangeCoins.Add(value \/ 3); \/\/ 2 1 0 0\n            exchangeCoins.Add(value \/ 4); \/\/ 1 0 0 0\n        }\n       else\n        {\n            throw new Exception(\"Value can't be zero!\");\n        }\n\n        return exchangeCoins;\n\n    }\n}\n<\/code><\/pre>\n<p>Thats why your code returns 6 <\/p>\n<hr>\n<p>If your goal is to get 15 zeros then you have to design ATM being recursive:<\/p>\n<pre><code>static void Main( string[ ] args )\n{\n    int input = int.Parse( Console.ReadLine() );\n    int zeroes = 0;\n\n    List&lt;int&gt; myList = ATM( input );\n\n    foreach ( var zero in myList )\n    {\n        if ( zero == 0 )\n        {\n            zeroes += 1;\n        }\n    }\n\n    Console.WriteLine( zeroes );\n    Console.ReadKey();\n\n\n    Console.ReadKey();\n}\n<\/code><\/pre>\n<p>Recursive call in ATM<\/p>\n<pre><code>static List&lt;int&gt; ATM( int value )\n{\n    List&lt;int&gt; exchangeCoins = new List&lt;int&gt;();\n\n    if ( value != 0 )\n    {\n        exchangeCoins.Add( value \/ 2 );\n        exchangeCoins.Add( value \/ 3 );\n        exchangeCoins.Add( value \/ 4 );\n\n        \/\/ recursive call on the three items\n        foreach ( var item in exchangeCoins.ToArray() )\n        {\n            exchangeCoins.AddRange( ATM( item ) );\n        }\n    }\n\n    return exchangeCoins;\n\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">1<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Recursion doesn&#8217;t do what its supposed to be doing <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Let&#8217;s step through your code static void Main(string[] args) { int input = 7; int zeroes = 0; List&lt;int&gt; myList = ATM(input); mylist =&gt; [3,2,1] foreach(var number in myList.ToArray()) { if (number != 0) { myList.AddRange(ATM(number)); } else { continue; } after 3 mylist =&gt; [3,2,1,1,1,0] after 2 mylist =&gt; [3,2,1,1,1,0,1,0,0] after 1 mylist &#8230; <a title=\"[Solved] Recursion doesn&#8217;t do what its supposed to be doing\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-recursion-doesnt-do-what-its-supposed-to-be-doing\/\" aria-label=\"More on [Solved] Recursion doesn&#8217;t do what its supposed to be doing\">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":[324,494],"class_list":["post-14378","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-recursion"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Recursion doesn&#039;t do what its supposed to be doing - 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-recursion-doesnt-do-what-its-supposed-to-be-doing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Recursion doesn&#039;t do what its supposed to be doing - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Let&#8217;s step through your code static void Main(string[] args) { int input = 7; 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