/**
 * instructor: Ray Ortigas
 * Date: Summer 2000
 * http://www.dgp.toronto.edu/~rayo/tutorials/108/2000summer/
 */

// A shape.
abstract public class Shape {
    
    // The x-coordinate of this shape.
    public int x = 0;
    
    // The y-coordinate of this shape.
    public int y = 0;
    
    // Returns the area of this shape.
    abstract public int getArea();
    
    // Moves this shape by 'dx' and 'dy'.
    public void move(int dx, int dy) {
        x += dx;
        y += dy;
    }
    
    // Returns a string representation of this shape.
    public String toString() {
        return "x = " + x + "; y = " + y;
    }
}