#include <assert.h>
#include <stdio.h>

int main (int argc, char** argv) {
   char*        data   = argv[0];  /* Just to get a valid pointer */
   unsigned int offset = 3;

   printf ("Original: %p\n", data);

   data += offset;
   printf ("+3      : %p\n", data);

   data += -offset;
   printf ("-3      : %p\n", data);

   assert (data == argv[0]);    /* Works on 32-bit systems, fails on 64-bit */

   return 0;
}