#include <stdio.h>

void func( int *p )
{
   printf( " p = %u\n",  p );    // Print the parameter p
                                 // We SHOULD use %p (hex), but I like %u (dec)
				 // I will get a warning and I can live with it

   printf( "*p = %d\n\n", *p );  // Print the variable pointed to by p     
}

int main(int argc, char *argv[])
{
    int x1 = 4, x2 = 88;

    func( &x1 );		// Pass address of x1 to function  

    func( &x2 );		// Pass address of x2 to function
}