{"id":6392,"date":"2022-09-03T02:24:32","date_gmt":"2022-09-02T20:54:32","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-difference-between-char-char-char-closed\/"},"modified":"2022-09-03T02:24:32","modified_gmt":"2022-09-02T20:54:32","slug":"solved-difference-between-char-char-char-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-difference-between-char-char-char-closed\/","title":{"rendered":"[Solved] Difference between char , char[] , char * [closed]"},"content":{"rendered":"

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char<\/code> represents a character (allocated on the stack). If you want to set it to empty, use char c=\"\\0\"<\/code> or char c = (char) 0<\/code>.<\/p>\n

char* cPtr<\/code> is a pointer to a character. You can allocate an empty character on the heap with char* c = new char('\\0')<\/code>.<\/p>\n

char c[n]<\/code> is a character array of size n<\/code>.<\/p>\n

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Edit<\/strong><\/p>\n

As people have correctly pointed out below, a char<\/code> is never empty, in the same sense as a container such as std::vector<\/code> or std::string<\/code> can be empty. A char<\/code> is not fundamentally different to, say, an int<\/code>, it’s just shorter (1 byte as opposed to 2 or 4 or 8). Can an int<\/code> be empty? Not as such; it can be zero, meaning that all its bits are set to zero in memory, and the same goes for a char. char c=\"\\0\"<\/code> will be represented as “00000000” on the stack.<\/p>\n

A pointer to a char (char* cPtr<\/code>), on the other hand can be ’empty’ in the sense that it can point nowhere, by setting it to NULL<\/code>. In this case, the pointer itself will exist on the stack and will contain a special sequence of 0\/1’s that your system interprets as NULL<\/code>. Once you do cPtr = new char('\\0')<\/code>, a char<\/code> (i.e. a byte) will be allocated on the heap and set to “00000000”, and the value of cPtr<\/code> on the stack will be changed to point to the address of the new character on the heap.<\/p>\n

PS: don’t actually do char* cPtr = new char('\\0')<\/code>, use an std::vector<char><\/code> or an std::string<\/code>. Also, you may want to look into smart pointers.<\/p>\n<\/p><\/div>\n

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3<\/span> <\/p><\/div>\n<\/div>\n

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solved Difference between char , char[] , char * [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"

[ad_1] char represents a character (allocated on the stack). If you want to set it to empty, use char c=”\\0″ or char c = (char) 0. char* cPtr is a pointer to a character. You can allocate an empty character on the heap with char* c = new char(‘\\0’). char c[n] is a character array … 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-6392","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c"],"yoast_head":"\n[Solved] Difference between char , char[] , char * [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-difference-between-char-char-char-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Difference between char , char[] , char * [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] char represents a character (allocated on the stack). If you want to set it to empty, use char c="" or char c = (char) 0. char* cPtr is a pointer to a character. You can allocate an empty character on the heap with char* c = new char(''). char c[n] is a character array ... 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