// example on constructors and destructors

#include <iostream>
using namespace std;

class Rectangle {
    int *width, *height;
  public:
    Rectangle (int,int);
    ~Rectangle ();
    int area () {return (*width * *height);}
};

Rectangle::Rectangle (int a, int b) {
  width = new int;
  height = new int;
  *width = a;
  *height = b;
}

Rectangle::~Rectangle () {
  delete width;
  delete height;
}

int main () {
  Rectangle rect (3,4), rectb (5,6);
  cout << "rect area: " << rect.area() << endl;
  cout << "rectb area: " << rectb.area() << endl;
  getchar();
  return 0;
}