////   This file contains the C++ code from Program 3.2 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/pgm03_02.cpp//void PrefixSums (int a [], unsigned int n){    for (int j = n - 1; j >= 0; --j)    {	int sum = 0;	for (unsigned int i = 0; i <= j; ++i)	    sum += a[i];	a [j] = sum;    }}