13_6.cpp

//pointer to class
#include <iostream>
using namespace std;

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

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

int main()
{
    CRectangle a, *b, *c;
    CRectangle *d = new CRectangle[2];
    b = new CRectangle;
    c = &a;
    a.set_values(1,2);
    b->set_values(3,4);
    d->set_values(5,6);
    d[1].set_values(7,8);
    cout << "a area: " << a.area() << endl;
    cout << "b area: " << b->area() << endl;
    cout << "*c area: " << c->area() << endl;
    cout << "d[0] area: " << d[0].area() << endl;
    cout << "d[1] area: " << d[1].area() << endl;
    delete[] d;
    delete b;
    getchar();
    return 0;
}