#include <stdio.h>


void func( double *p )
{
   printf( " p = %u\n",  p );   // Print the parameter p
   printf( "*p = %lf\n", *p );   // Print the variable pointed to by p     
}

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

    printf("Value of &x1 = %u\n", &x1 );
    printf("Value of  x1 = %lf\n", x1 );

    func( &x1 );

    putchar('\n');

    printf("Value of &x2 = %u\n", &x2 );
    printf("Value of  x2 = %lf\n", x2 );

    func( &x2 );
}