#include <iostream>
int main( void )
{
   int num = 12;
   int *numPtr;

   numPtr = &num; /* Now numPtr points to num. */
   std::cout << "num = " << num
        << ", value of num using indirection is "
        << *numPtr << '\n';
   std::cout << "address of num = " << &num
        << ", address held in numPtr = " << numPtr << '\n';
   std::cout << "The address of the pointer variable itself is "
        << &numPtr << '\n';
   *numPtr = *numPtr + 1; /* now num holds 13 */
   std::cout << "*numPtr = " << *numPtr << ", num = " << num << '\n';
}