const int MAX_LENGTH = 30;
typedef char stringType[MAX_LENGTH+1];

void WriteBackward(stringType S, int Size)
// ---------------------------------------------------
// Writes a character string backward.
// Precondition: The string S contains Size 
// characters, where Size >= 0.
// Postcondition: S is written backward, but remains
// unchanged.
// ---------------------------------------------------
{
   if (Size > 0)
   {  // write the last character
      cout << S[Size-1];

      // write the rest of the string backward
      WriteBackward(S, Size-1);  // Point A
   }  // end if

   // Size == 0 is the base case - do nothing
}  // end WriteBackward