#include <iostream>
using namespace std;

class Rectangle {
    int width, height;
  public:
    void set_values (int &a,int &b);
    int area () {return width*height;}
};

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

int main () {
  Rectangle rect, rectb;
	int x;
	int y;
	x =10 ;
	y = 4;
rect.set_values (x,y);
//  rectb.set_values (5,6);
  cout << "rect area: " << rect.area() << endl;
//  cout << "rectb area: " << rectb.area() << endl;
  return 0;
}