{"id":27954,"date":"2022-12-27T17:25:44","date_gmt":"2022-12-27T11:55:44","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-what-actually-happenes-in-this-code\/"},"modified":"2022-12-27T17:25:44","modified_gmt":"2022-12-27T11:55:44","slug":"solved-what-actually-happenes-in-this-code","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-what-actually-happenes-in-this-code\/","title":{"rendered":"[Solved] What actually happenes in this code?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-25144738\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"25144738\" data-parentid=\"25144149\" data-score=\"0\" 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>Private variables are there to help with the work behind the scenes in a class, work that the creator doesn&#8217;t want you interfering in. Just because you can&#8217;t see or access the private variables, it doesn&#8217;t mean the compiler&#8217;s just going to throw them away. Perhaps it will make more sense to you in this example:<\/p>\n<pre><code>class Animal {\n    int legs;\npublic:\n    Animal(int legs) : legs(legs) {}\n    ~Animal() {}\n    std::string how_fast() {\n        if(legs &gt; 4) {\n            return \"Super fast!\";\n        } else if (legs &gt; 2) {\n            return \"Pretty fast.\";\n        } else {\n            return \"Slow.\";\n        }\n    }\n};\n\nclass Lion: public Animal{\n    int humans_eaten;\npublic:\n    Lion(int eaten) : Animal(4), humans_eaten(eaten) {}\n    ~Lion() {}\n};\n<\/code><\/pre>\n<p>Here <code>legs<\/code> is private in the <code>Animal<\/code> class because this should already be known to the children. If I am doing calculations in <code>Lion<\/code> that require me to use the number of legs, it will always be 4, however, this is not always the case for <code>Animal<\/code>.<\/p>\n<p>Even though Lion can never access Animal&#8217;s <code>legs<\/code>, Animal needs to know that number for its calculations in <code>how_fast<\/code>. Does this make sense?<\/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 What actually happenes in this code? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Private variables are there to help with the work behind the scenes in a class, work that the creator doesn&#8217;t want you interfering in. Just because you can&#8217;t see or access the private variables, it doesn&#8217;t mean the compiler&#8217;s just going to throw them away. Perhaps it will make more sense to you in &#8230; <a title=\"[Solved] What actually happenes in this code?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-what-actually-happenes-in-this-code\/\" aria-label=\"More on [Solved] What actually happenes in this code?\">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":[324,528,527,547],"class_list":["post-27954","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-constructor","tag-inheritance","tag-oop"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] What actually happenes in this code? - 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-what-actually-happenes-in-this-code\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] What actually happenes in this code? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Private variables are there to help with the work behind the scenes in a class, work that the creator doesn&#8217;t want you interfering in. 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