/* CpSc 215 Example: Illustrate pointer basics */

/*
** This program illustrates some introductory concepts of
** pointers in C.
*/

#include <stdio.h>
#include <stdlib.h>

int main(void) {

   int n = 10;
   int *p;
   int a[5];
   int i;

   /* Initialize a to {0, 2, 4, 6, 8}. */
   for (i=0; i<5; i++)  a[i] = 2*i;

   p = &n;
   printf("\np is %d, *p is %d, n is %d\n", p, *p, n);

   *p = *p + 7;
   printf("\nAfter *p += 7, n is %d\n", n);

   p = &a[0];
   printf("\nStarting p at a[0] and incrementing:\n");
   for (i=1; i<6; i++) {
      printf("  %d", *p);
      p++;
   }
   printf("\n");

   printf("\nChecking the elements of a:\n");
   for (i=0; i<5; i++)
      printf("  %d", a[i]);
   printf("\n");

  return EXIT_SUCCESS;
}