Software Design 2e - DIM

Pearson Education LimitedEdinburgh GateHarlowEssex CM20 2JEEnglandand Associated Companies throughout the worldVisit us on the World Wide Web at:www.pearsoned.co.ukFirst published 1993Second edition 2003© Addison-Wesley Publishers Limited 1993© Pearson Education Limited 2003The right of David Budgen to be identified as the author of this work has been asserted byhim in accordance with the Copyright, Designs and Patents Act 1988.All rights reserved. No part of this publication may be reproduced, stored in aretrieval system, or transmitted in any form or by any means, electronic, mechanical,photocopying, recording or otherwise, without either the prior written permission of thepublisher or a licence permitting restricted copying in the United Kingdom issued by theCopyright Licensing Agency Ltd, 90 Tottenham Court Road, London W1T 4LP.The programs in this book have been included for their instructional value. They have beentested with care but are not guaranteed for any particular purpose. The publisher does notoffer any warranties or representations nor does it accept any liabilities with respect to theprograms.All trademarks used herein are the property of their respective owners. The use of anytrademark in this text does not vest in the author or publisher any trademark ownershiprights in such trademarks, nor does the use of such trademarks imply any affiliation withor endorsement of this book by such owners.ISBN 0 201 72219 4British Library Cataloguing-in-Publication DataA catalogue record for this book is available from the British LibraryLibrary of Congress Cataloging-in-Publication DataBudgen, D. (David)Software design / David Budgen.—2nd ed.p. cm.Includes bibliographical references and index.ISBN 0–201–72219–4 (alk. paper)1. Computer software—Development. I. Title.QA76.76.D47B83 2003005.1′2—dc21 200304185910 9 8 7 6 5 4 3 2 108 07 06 05 04 03Typeset in 10/12pt Sabon by 35Printed and bound in Great Britain by Biddles Ltd., Guildford and King’s LynnThe publisher’s policy is to use paper manufactured from sustainable forests.