Constructor

*
Constructors

Class constructors are special member functions of a class. They are executed whenever new objects are created within that class.

The constructor's name is identical to that of the class. It has no return type, not even void.
*/
class myClass {
  public:
    myClass() {
      cout <<"Hey";
    }
    void setName(string x) {
      name = x;
    }
    string getName() {
      return name;
    }
  private:
    string name;
};

int main() {
  myClass myObj;

  return 0;
}

//Outputs "Hey"

//Now, upon the creation of an object of type myClass, the constructor is automatically called.

////////////////////////////////
#include <iostream>
using namespace std;

class Rectangle
 {
     double mHeight, mWidth;
public:
      Rectangle() :mHeight(1),mWidth(1){}
      Rectangle(double height, double width) :mHeight (height), mWidth(width) {}
      void setRectangle(double x, double y)
 { 
     mHeight =x;
     mWidth=y;
}
   double getHeight() { return mHeight ;}
   double getWidth() { return mWidth ;}
} ;

int main () {
Rectangle first(5,6);
first.setRectangle(5, 6);

return 0;
}