// Client program that utilizes the Point class.
public class PointClient {
   public static void main(String[] args) {
//       // old approach
//       int x1 = 2;
//       int y1 = 6;
//       int x2 = 4;
//       int y2 = 9;
//       System.out.println("Point 1 from origin: " + distanceFromOrigin(x1, y1));
//       System.out.println("Point 2 from origin: " + distanceFromOrigin(x2, y2));
//       System.out.println("Distance between points: " + distanceBetween(x1, y1, x2, y2));
//       System.out.println();
      
//       // encapsulated approach
//       Point p1 = new Point();
//       p1.x = 2;
//       p1.y = 6;
//       Point p2 = new Point();
//       p2.x = 4;
//       p2.y = 9;
//       System.out.println("Point 1 from origin: " + distanceFromOrigin(p1));
//       System.out.println("Point 2 from origin: " + distanceFromOrigin(p2));
//       System.out.println("Distance between points: " + distanceBetween(p1, p2));
//       System.out.println();
//       
//       translate(p1, 5, -7);
//       System.out.println("Point 1 from origin: " + distanceFromOrigin(p1));
//       System.out.println("Point 2 from origin: " + distanceFromOrigin(p2));
//       System.out.println("Distance between points: " + distanceBetween(p1, p2));
//       System.out.println();
      
      // object-oriented approach
      Point p3 = new Point(2, 6);
      Point p4 = new Point(4, 9);
      System.out.println("Point 3: " + p3);
      System.out.println("Point 4: " + p4);
      System.out.println("Point 3 from origin: " + p3.distanceFromOrigin());
      System.out.println("Point 4 from origin: " + p4.distanceFromOrigin());
      System.out.println("Distance between points: " + p3.distanceTo(p4));
      System.out.println();
      
      p3.translate(5, -7);
      System.out.println("Point 3 from origin: " + p3.distanceFromOrigin());
      System.out.println("Point 4 from origin: " + p4.distanceFromOrigin());
      System.out.println("Distance between points: " + p3.distanceTo(p4));
      System.out.println();
   }
   
//    public static double distanceFromOrigin(int x, int y) {
//       return Math.sqrt(x * x + y * y);
//    }
//    
//    public static double distanceBetween(int x1, int y1, int x2, int y2) {
//       return Math.sqrt(Math.pow(x1 - x2, 2) + Math.pow(y1 - y2, 2));
//    }
//    
//    public static double distanceFromOrigin(Point p) {
//       return Math.sqrt(p.x * p.x + p.y * p.y);
//    }
//    
//    public static double distanceBetween(Point p1, Point p2) {
//       return Math.sqrt(Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2));
//    }
//    
//    public static void translate(Point p, int dx, int dy) {
//       p.x += dx;
//       p.y += dy;
//    }
}