/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Swap two references.
using System;
class RefSwap {
int a, b;
public RefSwap(int i, int j) {
a = i;
b = j;
}
public void show() {
Console.WriteLine("a: {0}, b: {1}", a, b);
}
// This method now changes its arguments.
public void swap(ref RefSwap ob1, ref RefSwap ob2) {
RefSwap t;
t = ob1;
ob1 = ob2;
ob2 = t;
}
}
public class RefSwapDemo {
public static void Main() {
RefSwap x = new RefSwap(1, 2);
RefSwap y = new RefSwap(3, 4);
Console.Write("x before call: ");
x.show();
Console.Write("y before call: ");
y.show();
Console.WriteLine();
// exchange the objects to which x and y refer
x.swap(ref x, ref y);
Console.Write("x after call: ");
x.show();
Console.Write("y after call: ");
y.show();
}
}
