Answer P24

#include  <stdio.h> 

void main ( void )
{
  int value;
  int *pv;
  int **ppv;
  int **ppw;

  value = 32;
  pv =  &value;
  ppv = &pv;
  ppw = &pv;

  printf("value = %d\n", value );
  printf("**ppv = %d\n", **ppv );
  printf("**ppw = %d\n", **ppw );

}

There is no problem setting ppv and ppw to point to the same thing.