{"id":310,"date":"2021-01-27T20:08:25","date_gmt":"2021-01-27T14:38:25","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=310"},"modified":"2021-06-21T11:07:55","modified_gmt":"2021-06-21T05:37:55","slug":"pointers-in-cpp-hackerrank-solution","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/pointers-in-cpp-hackerrank-solution\/","title":{"rendered":"Pointer in C++ | HackerRank Solution"},"content":{"rendered":"\n<p>Today we are going to solve <strong>Pointers in C++ HackerRank Solution<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1167\" height=\"679\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution-codingbroz.png\" alt=\"Pointers in C++ HackerRank Solution\" class=\"wp-image-314\" srcset=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution-codingbroz.png 1167w, https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution-codingbroz-768x447.png 768w\" sizes=\"(max-width: 1167px) 100vw, 1167px\" \/><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-662e76ec2bce0\" class=\"ez-toc-cssicon-toggle-label\"><label class=\"ez-toc-title\">Table of Contents<\/label>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0090ff;color:#0090ff\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0090ff;color:#0090ff\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-662e76ec2bce0\" checked \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.codingbroz.com\/pointers-in-cpp-hackerrank-solution\/#Objective\" title=\"Objective\">Objective<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.codingbroz.com\/pointers-in-cpp-hackerrank-solution\/#Task\" title=\"Task\">Task<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.codingbroz.com\/pointers-in-cpp-hackerrank-solution\/#Input_Format\" title=\"Input Format\">Input Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.codingbroz.com\/pointers-in-cpp-hackerrank-solution\/#Output_Format\" title=\"Output Format\">Output Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.codingbroz.com\/pointers-in-cpp-hackerrank-solution\/#Explanation\" title=\"Explanation\">Explanation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.codingbroz.com\/pointers-in-cpp-hackerrank-solution\/#Solution_%E2%80%93_Pointers_in_C_HackerRank_Solution\" title=\"Solution &#8211; Pointers in C++ HackerRank Solution\">Solution &#8211; Pointers in C++ HackerRank Solution<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Objective\"><\/span><strong>Objective<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In this challenge, you will learn to implement the basic functionalities of pointers in C++. A pointer in C++ is a way to share a memory address among different contexts (primarily functions). They are primarily used whenever a function needs to modify the content of a variable that it does not own.<\/p>\n\n\n\n<p>In order to access the memory address of a variable, val, prepend it with &amp; sign. For example, &amp;val returns the memory address of val.<\/p>\n\n\n\n<p>This memory address is assigned to a pointer and can be shared among various functions. For example, int *p = &amp;val will assign the memory address of val to pointer p. To access the content of the memory to which the pointer points, prepend it with a *. For example, *p will return the value reflected by val and any modification to it will be reflected at the source (val).<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">void increment(int *v) {\n        (*v)++; \n    }\n      \tint main() {\n        int a;\n        scanf(\"%d\", &amp;a);\n        increment(&amp;a);\n        printf(\"%d\", a);\n    \treturn 0;      \n    }   \n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Task\"><\/span><strong>Task<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Complete the function void update(int *a,int *b). It receives two integer pointers, int* a and int* b. Set the value of a to their sum, b and to their absolute difference. There is no return value, and no return statement is needed.<\/p>\n\n\n\n<ul><li><strong>a\u2019 = a+b<\/strong><\/li><li><strong>b\u2019 = |a-b|<\/strong><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Input_Format\"><\/span><strong>Input Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The input will contain two integers, a and b, separated by a newline.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Output_Format\"><\/span><strong>Output Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Modify the two values in place and the code stub main() will print their values.<\/p>\n\n\n\n<p><strong>Note:<\/strong> Input\/output will be automatically handled. You only have to complete the function described in the &#8216;task&#8217; section.<\/p>\n\n\n\n<p><strong>Sample Input<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>4\n5\n<\/code><\/pre>\n\n\n\n<p><strong>Sample Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>9\n1\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Explanation\"><\/span><strong>Explanation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul><li>a\u2019 = 4 + 5 = 9<\/li><li>b\u2019 = | 4 &#8211; 5 | = 1<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_%E2%80%93_Pointers_in_C_HackerRank_Solution\"><\/span><strong>Solution &#8211; Pointers in C++ HackerRank Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;stdio.h>\n\nvoid update(int *a,int *b) {\n    \/\/ Complete this function  \n    int sum = *a+*b;\n    int mult;\n    if(*a>*b)\n    {\n         mult = *a-*b;\n    }  \n    else\n    {\n        mult = *b-*a;\n    }\n     *a = sum;\n   *b = mult;\n}\n\nint main() {\n    int a, b;\n    int *pa = &amp;a, *pb = &amp;b;\n    \n    scanf(\"%d %d\", &amp;a, &amp;b);\n    update(pa, pb);\n    printf(\"%d\\n%d\", a, b);\n\n    return 0;\n}\n<\/pre>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-5246141430412355\"\n     data-ad-slot=\"8798433565\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1303\" height=\"861\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution.png\" alt=\"Pointers in C++ HackerRank Solution\" class=\"wp-image-311\" srcset=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution.png 1303w, https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution-768x507.png 768w\" sizes=\"(max-width: 1303px) 100vw, 1303px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1291\" height=\"824\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution-result.png\" alt=\"Pointers in C++ HackerRank Solution\" class=\"wp-image-312\" srcset=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution-result.png 1291w, https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution-result-768x490.png 768w\" sizes=\"(max-width: 1291px) 100vw, 1291px\" \/><\/figure>\n\n\n\n<p><strong>Disclaimer: <\/strong>The above Problem (<strong><a href=\"https:\/\/www.hackerrank.com\/challenges\/c-tutorial-pointer\/problem\" target=\"_blank\" aria-label=\"Pointers in C++ (opens in a new tab)\" rel=\"noreferrer noopener nofollow\" class=\"rank-math-link\">Pointers in C++<\/a><\/strong>) is generated by <strong><a href=\"https:\/\/www.hackerrank.com\/\" target=\"_blank\" aria-label=\"Hacker Rank (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"rank-math-link\">Hacker Rank<\/a><\/strong> but the Solution is provided by <strong><a href=\"https:\/\/www.codingbroz.com\/\" class=\"rank-math-link\">CodingBroz<\/a><\/strong>.<\/p>\n\n\n\n<p><strong>Broz Who Code<\/strong><\/p>\n\n\n\n<p><strong>CodingBroz<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Today we are going to solve Pointers in C++ HackerRank Solution. Objective In this challenge, you will learn to implement the basic functionalities of pointers in C++. A pointer in C++ is a way to share a memory address among different contexts (primarily functions). They are primarily used whenever a function needs to modify the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":314,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[9,159],"tags":[22,80,81,18],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/01\/pointers-in-c-hackerrank-solution-codingbroz.png","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/310"}],"collection":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/comments?post=310"}],"version-history":[{"count":5,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/310\/revisions"}],"predecessor-version":[{"id":3551,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/310\/revisions\/3551"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media\/314"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}