// Example showing a base class (Shape) and a derived 
// class Rectangle. Notice how Rectangle inherits Shape's
// display function.

#include <iostream>

using namespace std;

class Shape {
  protected:
    int width, height;
  public:
    Shape() { width = height = 0; }
    Shape(int w, int h) { width = w; height = h; }
    void display() const;
};

void Shape::display() const {
  cout << width << " " << height << endl; 
}


class Rectangle : public Shape {
  public:
    Rectangle() {}
    Rectangle(int w, int h) : Shape(w, h) {}
};

int main() {
  Rectangle r;
  Rectangle q(4,5);
  r.display();
  q.display();
  return 0;
}