13_5.cpp

//overloading class constructors
#include <iostream>
using namespace std;

class CRectangle
{
      int width, height;
      public:
             CRectangle(void);
             CRectangle(int,int);
             int area(void)
             {
                 return (width*height);
             }
};

CRectangle::CRectangle()
{
                        width = 5;
                        height = 5;
}

CRectangle::CRectangle(int a, int b)
{
                           width = a;
                           height = b;
}

int main()
{
    CRectangle rect(6,9);
    CRectangle rectb;
    cout << "rect area: " << rect.area() << endl;
    cout << "rectb area: " << rectb.area() << endl;
    getchar();
    return 0;
}