{"id":30005,"date":"2023-01-12T17:38:09","date_gmt":"2023-01-12T12:08:09","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-c-confused-about-bitwise-shift-operation\/"},"modified":"2023-01-12T17:38:09","modified_gmt":"2023-01-12T12:08:09","slug":"solved-c-confused-about-bitwise-shift-operation","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-c-confused-about-bitwise-shift-operation\/","title":{"rendered":"[Solved] C confused about bitwise shift operation"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-44019996\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"44019996\" data-parentid=\"44019819\" 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>This is less to do with C, and more to do with mathematics.<\/p>\n<blockquote>\n<p>The hash &lt;&lt; 5 + hash expression is the same as hash * 32 + hash or just hash * 33.<\/p>\n<\/blockquote>\n<p>Basic algebra states these things are true (these are written in C):<\/p>\n<pre><code>\/* #1 *\/ (a * b + a * c) == (a * (b + c))\n\/* #2 *\/ (a) == (a * 1)\n<\/code><\/pre>\n<p>Applying #2, we can say:<\/p>\n<pre><code>(hash * 32 + hash) == (hash * 32 + hash * 1)\n<\/code><\/pre>\n<p>Now applying #1, we can find:<\/p>\n<pre><code>(hash * 32 + hash * 1) == (hash * (32 + 1))\n<\/code><\/pre>\n<p>This can be reduced to:<\/p>\n<pre><code>hash * 33\n<\/code><\/pre>\n<p>This is basic mathematics, but maybe you are tired or overworked and just can&#8217;t see how this works \ud83d\ude42<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">3<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved C confused about bitwise shift operation <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] This is less to do with C, and more to do with mathematics. The hash &lt;&lt; 5 + hash expression is the same as hash * 32 + hash or just hash * 33. Basic algebra states these things are true (these are written in C): \/* #1 *\/ (a * b + a &#8230; <a title=\"[Solved] C confused about bitwise shift operation\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-c-confused-about-bitwise-shift-operation\/\" aria-label=\"More on [Solved] C confused about bitwise shift operation\">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":[2907,324],"class_list":["post-30005","post","type-post","status-publish","format-standard","hentry","category-solved","tag-bitwise-operators","tag-c"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] C confused about bitwise shift operation - 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-c-confused-about-bitwise-shift-operation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] C confused about bitwise shift operation - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] This is less to do with C, and more to do with mathematics. The hash &lt;&lt; 5 + hash expression is the same as hash * 32 + hash or just hash * 33. Basic algebra states these things are true (these are written in C): \/* #1 *\/ (a * b + a ... 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