A C-Program Question

From: Kotni (mrkotni_at_surffast.com)
Date: 10/31/03 

Date: 31 Oct 2003 02:09:20 -0800

Write a function of type void fn (void)
so that the o/p of the program should be anything other than 20.
(Dont use #define fn()..... )

 main() {
 int i=20;
 fn();
 printf("%d \n",i);
 }