using namespace std; // note use of namespace
int main()
{
  int var;
  int *p;
  p = &var;
  var  = 421;
  printf("Address of integer variable var : %p\n",&var);
  printf("Its value: %d\n", var);
  printf("Value of integer pointer p : %p\n",p);
  printf("The value p points at :  %d\n",*p);
  printf("Address of the pointer p : %p\n",&p);
  return 0;
}