void SolveTowers(int Count, char Source, char Destination, 
                 char Spare)
{
   if (Count == 1)
   {  cout << "Move top disk from pole " << Source
           << " to pole " << Destination << endl;
   }
   else
   {  SolveTowers(Count-1, Source, Spare, Destination); // X
      SolveTowers(1, Source, Destination, Spare);       // Y
      SolveTowers(Count-1, Spare, Destination, Source); // Z
   }  // end if
}  // end SolveTowers