////   This file contains the C++ code from Program 2.7 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_07.cpp//int GeometricSeriesSum (int x, unsigned int n){    int sum = 0;    for (unsigned int i = 0; i <= n; ++i)	sum = sum * x + 1;    return sum;}