{"id":12959,"date":"2022-10-02T13:55:36","date_gmt":"2022-10-02T08:25:36","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-working-of-function-pointers-closed\/"},"modified":"2022-10-02T13:55:36","modified_gmt":"2022-10-02T08:25:36","slug":"solved-working-of-function-pointers-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-working-of-function-pointers-closed\/","title":{"rendered":"[Solved] Working of function pointers [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-46748586\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"46748586\" data-parentid=\"46748216\" data-score=\"0\" data-position-on-page=\"2\" data-highest-scored=\"0\" data-question-has-accepted-highest-score=\"0\" itemprop=\"suggestedAnswer\" 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>This is the reason why some people does not like pointers in C and C++. See my explanation below in your program:-<\/p>\n<pre><code>#include&lt;iostream.h&gt;\n# include &lt;conio.h&gt;\nvoid main()\n{\n    clrscr();\n    int sum(int(*)(int),int);\/\/ Here first parameter in `sum` is a pointer to a function which return type is int.  `int(*)(int)` here int(*) is function pointer and (int) is its parameter type. \n    int square(int);\n    int cube(int);\n    cout&lt;&lt;sum(square,4)&lt;&lt;endl;\/\/ Now you are passing address of function  `square` as first parameter and its parameter 4, like square(4)\n    cout&lt;&lt;sum(cube,4)&lt;&lt;endl; \/\/ Here you are passing address of function `cube` as parameter and 4 as parameter to cube function\n    getch();\n}\n\nint sum(int(*ptr)(int k),int n)\n{\n     int s=0;\n     for(int i=1;i&lt;=n;i++)\n     {\n         s+=(*ptr)(i); \/\/This `ptr` is nothing but the address of function passed to sum\n    \/\/hence it execute like below\n    \/\/When you are calling function `sum` with function pointer `square` as first parameter  \n        \/\/it execute like `s = s + square(i);`\n        \/\/Now at the second call to `sum` it execute like `s = s + cube(i);`\n     }\n     return s;\n}\n<\/code><\/pre>\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 Working of function pointers [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] This is the reason why some people does not like pointers in C and C++. See my explanation below in your program:- #include&lt;iostream.h&gt; # include &lt;conio.h&gt; void main() { clrscr(); int sum(int(*)(int),int);\/\/ Here first parameter in `sum` is a pointer to a function which return type is int. `int(*)(int)` here int(*) is function pointer &#8230; <a title=\"[Solved] Working of function pointers [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-working-of-function-pointers-closed\/\" aria-label=\"More on [Solved] Working of function pointers [closed]\">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-12959","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] Working of function pointers [closed] - 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-working-of-function-pointers-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Working of function pointers [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] This is the reason why some people does not like pointers in C and C++. See my explanation below in your program:- #include&lt;iostream.h&gt; # include &lt;conio.h&gt; void main() { clrscr(); int sum(int(*)(int),int);\/\/ Here first parameter in `sum` is a pointer to a function which return type is int. `int(*)(int)` here int(*) is function pointer ... 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