Rectangle Area

#include <iostream>
using namespace std;
class Rectangle
 {
     protected:
        int width;
        int height;
     
     public:
        Rectangle() : width(0), height(0) {}
        Rectangle(const int w, const int h) : width(w), height(h) {}
        
        virtual void display() const
        {
            cout << width << " " << height << endl;
        }
 };
 
 class RectangleArea : public Rectangle
 {
     public:
        RectangleArea() : Rectangle() {}
        RectangleArea(const int w, const int h) : Rectangle(w, h) {}
                
        void read_input()
        {
            char ch;
            cin >> width >> height;
        }
        
        virtual void display() const
        {
            cout << width * height << endl;
        }
        
 };


int main()
{
    RectangleArea r_area;
    r_area.read_input();
    r_area.Rectangle::display();
    r_area.display(); 
    return 0;
}