// more "pass by reference" DIS
// what happens if you make an alias?
// modified by Kiri Wagstaff, wkiri@cs.cornell.edu
// Hint: draw boxes and arrows to figure out what's happening

class Data3 
{
    int k = 0;
}

public class Pass3 
{
    public static void change(Data3 x, Data3 y) 
    {
	y = x;
	System.out.println("Before change (x): " + x.k);
	System.out.println("Before change (y): " + y.k);
	y.k++;
	System.out.println("After change (x): " + x.k);
	System.out.println("After change (y): " + y.k);
    }
    
    public static void main(String[] args) 
    {
	Data3 d1 = new Data3();
	Data3 d2 = new Data3();
	
	d1.k = 1;
	d2.k = 3;
	
	System.out.println("Before passing (x): " + d1.k);
	System.out.println("Before passing (y): " + d2.k);
	
	change(d1,d2);
	
	System.out.println("After passing (x): " + d1.k);
	System.out.println("After passing (y): " + d2.k);
    }
}