#include <stdio.h>

/* ---------------------------------------------------
   Function f( ) is defined BEFORE main's use of f( )
   --------------------------------------------------- */
int f(int x)
{
   return(x*x);                
}

int main(int argc, char *argv[])
{
   short x = 2;   // **** short
   int y = 0;

   y = f(x);	  // Computer must convert short x to int before passing x

   printf("x = %d, y = %d\n", x, y);
}