/* p17.c */

/* Example of a common error: failure to intialize */
/* a pointer before using it                       */

main()
{
   int  a[200];  // force ptr to live down in uninit land
   int  *ptr;

   printf("val of ptr is %p \n", ptr);

   *ptr = 99;

   printf("val of *ptr = %d and ptr is %p \n", *ptr, ptr);
}