////   This file contains the C++ code from Program 2.8 of//   "Data Structures and Algorithms//    with Object-Oriented Design Patterns in C++"//   by Bruno R. Preiss.////   Copyright (c) 1998 by Bruno R. Preiss, P.Eng.  All rights reserved.////   http://www.pads.uwaterloo.ca/Bruno.Preiss/books/opus4/programs/pgm02_08.cpp//int Power (int x, unsigned int n){    if (n == 0)	return 1;    else if (n % 2 == 0) // n is even	return Power (x * x, n / 2);    else // n is odd	return x * Power (x * x, n / 2);}