#include <stdio.h>

int main(void)
{
   int v=2, w;
   int *pv;

   pv = &v;
   w = pv;

   printf("%d %d %p\n", *pv, w, pv);

   *pv = 42;

   printf("%d %d %p\n", *pv, w, pv);

   return 0;
}