CHAPTER 13

image

Constructor

In addition to fields and methods, a class can contain a constructor. This is a special kind of method used to construct, or instantiate , the object. It always has the same name as the class and does not have a return type. To be accessible from another class the constructor needs to be declared in a section marked with the public access modifier.

class MyRectangle{ public:  int x, y;  MyRectangle();};MyRectangle::MyRectangle() { x = 10; y = 5; }

When a new instance of this class is created the constructor method will be called, which in this case assigns default values to the fields.

int main(){  MyRectangle s;}

Get C++ Quick Syntax Reference now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.