#include <stdio.h>

int f( short x ) ;               // Function DECLARATION (no function body !!)
int f( short x ) ;               // Function DECLARATION (no function body !!)

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

   y = f(x);		// C compiler will assume:   int f(int x)
			// C compiler will convert short x -> int and pass x

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


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