#include <stdio.h>
main()
{  int i, *p, x[5]={10,20,30,40,50};
   p=x;                /* the address of x[0] is copied to p  */

   p++;                /* p holds the address of x[1] */

   printf("%d\n\n", *p); /* prints 20 */

   *p=25;                 /* x[1]=25 */

   printf("%d\n\n", x[1]);  /* prints 25 */

   x[2]=*(--p)+3;         /*p points to x[0] and x[2]=13 */

   for (i=0; i<5; i++)      /* prints all elements and */
     printf("%d  ",*(p+i)); /* keep p as it is-pointing to x[0]  */
   printf("\n\n");

   for (i=0; i<5; i++)      /* prints all elements and */
     printf("%d  ", *p++);  /* change p along */
   printf("\n\n");


   for (p=x; p<&x[5]; p++)  /* prints all elements and */
     printf("%d  ", *p);    /* change p along */
   printf("\n\n");
 
   return 0;
}