// this file is a header file, typically it would be
// called circle.h
class Circle
{ 
   public:
     Circle(int x, int y, int r);  // x,y is location, r is radius
     double calcArea();
     double calcCircumference();
     int getX();
     int getY();
   private:
     const double pi = 3.141592;
     int x,y;     // center of the circle
     int radius;  // radius of the circle
};