#include <iostream>
#include <cstdlib>
using namespace std;
 
class CWin
{
private:
    char id;
    int width, height;
 
public:
    int area()
    {
        return width*height;
    }
    void show_area()
    {
        cout << "window " << id << ", area= " << area() << endl;
    }
 
    void set_data(char &i, int &w, int &h)
    {
        id = i;
        width = w;
        height = h;
    }
 
    void set_data(char &i)
    {
        id = i;
    }
 
    void set_data(int &w, int &h)
    {
        width = w;
        height = h;
    }
};
 
int main(void)
{
    CWin winA, winB;
 
    char a1 = 'A';
    int a2 = 50, a3 = 40;
    winA.set_data (a1,a2,a3);
    char b1 = 'B';
    winB.set_data (b1);
    int c1 = 80, c2 = 120;
    winB.set_data (c1,c2);
 
    winA.show_area();
    winB.show_area();
 
    system("pause");
    return 0;
}