//
//   This file contains the C# code from Program 2.6 of
//   "Data Structures and Algorithms
//    with Object-Oriented Design Patterns in C#"
//   by Bruno R. Preiss.
//
//   Copyright (c) 2001--2002 by Bruno R. Preiss, P.Eng.  All rights reserved.
//
//   http://www.brpreiss.com/books/opus6/programs/pgm02_06.txt
//
public class Example
{
    public static int GeometricSeriesSum(int x, int n)
    {
	int sum = 0;
	for (int i = 0; i <= n; ++i)
	{
	    int prod = 1;
	    for (int j = 0; j < i; ++j)
		prod *= x;
	    sum += prod;
	}
	return sum;
    }
}