////   This file contains the C++ code from Program 12.18 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/pgm12_18.cpp//PartitionTree::PartitionTree (unsigned int i, unsigned int n) :    Set (n),    item (i),    parent (0),    rank (0)    { count = 1; }PartitionAsForest::PartitionAsForest (unsigned int n) :    Partition (n),    array (n){    for (unsigned int item = 0; item < universeSize; ++item)	array [item] = new PartitionTree (item, universeSize);    count = n;}PartitionAsForest::~PartitionAsForest (){    for (unsigned int item = 0; item < universeSize; ++item)	delete array [item];}