{"id":233233,"date":"2023-02-09T11:55:00","date_gmt":"2023-02-09T08:55:00","guid":{"rendered":"https:\/\/wordpress.mediadoma.com\/?p=233233"},"modified":"2023-02-09T11:58:16","modified_gmt":"2023-02-09T08:58:16","slug":"c-valutanummerformatsfunktion","status":"publish","type":"post","link":"https:\/\/wordpress.mediadoma.com\/sv\/c-valutanummerformatsfunktion\/","title":{"rendered":"C++ Valutanummerformatsfunktion"},"content":{"rendered":"<blockquote>\n<p>En peng f\u00f6r dina tankar<\/p>\n<p>Givet ett positivt heltal n som representerar m\u00e4ngden cent du har, returnera det formaterade valutabeloppet. Till exempel, givet n = 123456, returnera &quot;1 234,56&quot;.<\/p>\n<p>Exempel 1<br \/>\nIng\u00e5ng<br \/>\nn = 132<br \/>\nUtg\u00e5ng<br \/>\n&quot;1.32&quot;<\/p>\n<p>Exempel 2<br \/>\nIng\u00e5ng<br \/>\nn = 2<br \/>\nUtg\u00e5ng<br \/>\n&quot;0,02&quot;<\/p>\n<p>Exempel 3<br \/>\nIng\u00e5ng<br \/>\nn = 100000000<br \/>\nUtdata<br \/>\n&quot;1 000 000,00&quot;<\/p>\n<\/blockquote>\n<h3>Formatera ett valutanummer med C++<\/h3>\n<p>\u00c4ven om den h\u00e4r uppgiften kan verka enkel med den <a href=\"https:\/\/wordpress.mediadoma.com\/sv\/ersaett-wordpress-inbyggda-soekruta-med-google-customize-search\/\" title=\"inbyggda\">inbyggda<\/a> funktionen s\u00e5som printf eller String-formatet (i Python), verkar det inte vara en trivial uppgift att implementera denna siffer-\/valutaformatering. F\u00f6rst skulle vi beh\u00f6va f\u00e5 penny-delen (br\u00e5k) genom att ber\u00e4kna de tv\u00e5 sista siffrorna (\u00e5terstoden med 100). Sedan m\u00e5ste vi gruppera de <a href=\"https:\/\/helloacm.com\/power-digit-sum-what-is-the-sum-of-the-digits-of-the-number-21000\/\" target=\"_blank\" rel=\"noopener nofollow\" class=\"external external_icon\">andra siffrorna<\/a> i tre.<\/p>\n<p>Vi beh\u00f6ver en string pad-funktion f\u00f6r att l\u00e4gga till de inledande nollorna f\u00f6r de mittersta grupperna och \u00e4ven penny (upp till 2 siffror som 0,01). Den mest signifikanta gruppen ska inte l\u00e4gga till <a href=\"https:\/\/helloacm.com\/how-to-compute-the-number-complement-for-integers\/\" target=\"_blank\" rel=\"noopener nofollow\" class=\"external external_icon\">inledande nollor.<\/a> Siffrorna \u00e4r \u00e5tskilda med kommatecken.<\/p>\n<pre><code>string solve(int n) {\n\u00a0 \u00a0 auto pad = [](int v, int d) {\n\u00a0 \u00a0 \u00a0 \u00a0 string ans = std::to_string(v);\n\u00a0 \u00a0 \u00a0 \u00a0 if (ans.size() &lt; d) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ans = string(d - (int)ans.size(), '0') + ans;\n\u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 \u00a0 \u00a0 return ans;\n\u00a0 \u00a0 };\n\u00a0 \u00a0 int cents = n % 100;\n\u00a0 \u00a0 n \/= 100;\n\u00a0 \u00a0 vector&lt;int&gt; groups;\n\u00a0 \u00a0 while (n &gt; 0) {\n\u00a0 \u00a0 \u00a0 \u00a0 groups.insert(begin(groups), n % 1000);\n\u00a0 \u00a0 \u00a0 \u00a0 n \/= 1000;\n\u00a0 \u00a0 }\n\u00a0 \u00a0 string ans = \"\";\n\u00a0 \u00a0 if (!groups.empty()) {\n\u00a0 \u00a0 \u00a0 \u00a0 ans += std::to_string(groups[0]);\n\u00a0 \u00a0 \u00a0 \u00a0 if (groups.size() &gt; 1) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ans += \",\";\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 for (int i = 1; i + 1 &lt; groups.size(); ++ i) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ans += pad(groups[i], 3) + \",\";\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 } \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ans += pad(groups.back(), 3);\n\u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 } else {\n\u00a0 \u00a0 \u00a0 \u00a0 ans += \"0\";\n\u00a0 \u00a0 }\n\u00a0 \u00a0 ans += \".\";\n\u00a0 \u00a0 ans += pad(cents, 2);\n\u00a0 \u00a0 return ans;\n}<\/code><\/pre>\n<p>Ovanst\u00e5ende C++-funktion deklarerar en lokal <a href=\"https:\/\/helloacm.com\/how-to-define-lambda-functions-in-c11\/\" target=\"_blank\" rel=\"noopener nofollow\" class=\"external external_icon\">lambda-<\/a> funktion med den funktionella syntaxen. Sedan grupperar vi siffrorna i tre och l\u00e4gger dem i vektorn. Sedan stoppar vi varje grupp inklusive pennydelen.<\/p>\n<p><div id=\"PostUnique_PostSource\" style=\"padding-top: 50px\">Inspelningsk\u00e4lla:  <a target=\"_blank\" rel=\"noopener nofollow\" href=\"\/\/helloacm.com\" class=\"external external_icon\">helloacm.com<\/a><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++ Valutanummerformatsfunktion<\/p>\n","protected":false},"author":1,"featured_media":224867,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wp_rev_ctl_limit":""},"categories":[1070,1070,724,848,1110,848,724],"tags":[1173],"class_list":["post-233233","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-en-dator","category-utvecklaren","category-handledningar","category-n-a","tag-affiai-sv"],"_links":{"self":[{"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/posts\/233233","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/comments?post=233233"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/posts\/233233\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/media\/224867"}],"wp:attachment":[{"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/media?parent=233233"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/categories?post=233233"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.mediadoma.com\/sv\/wp-json\/wp\/v2\/tags?post=233233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}