////   This file contains the C++ code from Program 4.16 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/pgm04_16.cpp//template <class T>void LinkedList<T>::Append (T const& item){    ListElement<T>* const tmp = new ListElement<T> (item, 0);    if (head == 0)	head = tmp;    else	tail->next = tmp;    tail = tmp;}