#include <stdio.h>

int
main ()
{
    int  first[10];   /* an array of 10 integers   */
    char second[10];  /* an array of 10 characters */
    int  idx;         /* loop index variable       */

    /* Print array starting addresses. */
    printf (" first starts at memory address %p\n", first);
    printf ("second starts at memory address %p\n\n", second);

    /* Print header for table. */
    printf ("                                       &first[idx] -   ");
    printf ("&second[idx] -\n");
    printf ("idx    &first[idx]     &second[idx]      &first[0]     ");
    printf ("  &second[0]\n");

    /* Print table of array indices. */
    for (idx = 0; 10 > idx; idx++) {
        /* Array indices in C run from 0 to ((length of array) - 1). */

	printf ("%2d%17p%17p%10ld%16ld\n", idx, &first[idx], &second[idx], 
		(&first[idx]) - (&first[0]),
		(&second[idx]) - (&second[0]));
    }

    /* C does not check array bounds for you.  Calculating addresses
     * is safe, but using non-existent array entries (not done here)
     * is not safe.
     */
    printf ("\n&first[-2] = %p\n", &first[-2]);
    printf ("&first[12] = %p\n", &first[12]);

    return 0;
}