{"id":6349,"date":"2022-09-02T21:36:01","date_gmt":"2022-09-02T16:06:01","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-is-this-a-constructor-c\/"},"modified":"2022-09-02T21:36:01","modified_gmt":"2022-09-02T16:06:01","slug":"solved-is-this-a-constructor-c","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-is-this-a-constructor-c\/","title":{"rendered":"[Solved] Is this a constructor (C++)"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

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The class has only one constructor<\/p>\n

Test (int x = 0, int y = 0) { this->x = x; this->y = y; }\n<\/code><\/pre>\n
that is the default constructor because it can be called withoit arguments..<\/p>\n
The constructor name is the same as the class.name.<\/p>\n
So these<\/p>\n
  Test setX(int a) { x = a; return *this; }\n  Test setY(int b) { y = b; return *this; }\n<\/code><\/pre>\n
are two non-static member functions named setX and setY that have one argument of the type int and the return type Test. The functions return copies of the object for which the functions are applied.<\/p>\n
So for example this statement<\/p>\n
obj1.setX(10).setY(20);\n<\/code><\/pre>\n
does not make sense because the call setY is applied to the temporary object returned by the call objq.setX( 10 ).<\/p>\n
The methods should be declared at least like<\/p>\n
  Test & setX(int a) { x = a; return *this; }\n  Test & setY(int b) { y = b; return *this; }\n<\/code><\/pre>\n
If the functions have the return type Test then this statement<\/p>\n
  obj1.setX(10).setY(20);\n  obj1.print();\n<\/code><\/pre>\n
produce output<\/p>\n
x = 10 y = 0\n<\/code><\/pre>\n
If to declare the functions with the return type Test & then the output of the above statements will be<\/p>\n
x = 10 y = 20\n<\/code><\/pre>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            <\/span> <\/p><\/div>\n<\/div>\n
[ad_2]<\/p>\n
solved Is this a constructor (C++) <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] The class has only one constructor Test (int x = 0, int y = 0) { this->x = x; this->y = y; } that is the default constructor because it can be called withoit arguments.. The constructor name is the same as the class.name. So these Test setX(int a) { x = a; return … 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":[324,1745,904],"class_list":["post-6349","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-construct","tag-declaration"],"yoast_head":"\n[Solved] Is this a constructor (C++) - 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-is-this-a-constructor-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Is this a constructor (C++) - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] The class has only one constructor Test (int x = 0, int y = 0) { this->x = x; this->y = y; } that is the default constructor because it can be called withoit arguments.. 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