Engineering Problem Solving with C++

Transcription

1 INTERNATIONAL EDITION Engineering Problem Solving with C++ Third Edition Delores M. Etter Jeanine A. Ingber

2 Vice President and Editorial Director, ECS: Marcia Horton Editor-in-Chief: Michael Hirsch Executive Editor: Tracy Dunkelberger Editorial Assistant: Stephanie Sellinger Vice President, Marketing: Patrice Jones Marketing Manager: Yezan Alayan Marketing Coordinator: Kathryn Ferranti Marketing Assistant: Emma Snider Vice President, Production: Vince O Brien Managing Editor: Jeff Holcomb Production Project Manager: Kayla Smith-Tarbox Publisher, International Edition: Angshuman Chakraborty Acquisitions Editor, International Edition: Somnath Basu Publishing Assistant, International Edition: Shokhi Shah Print and Media Editor, International Edition: Ashwitha Jayakumar Project Editor, International Edition: Jayashree Arunachalam Senior Operations Supervisor: Alan Fischer Manufacturing Buyer: Lisa McDowell Art Director: Anthony Gemmellaro Cover Designer: Anthony Gemmellaro Manager, Visual Research: Karen Sanatar Photo Researcher: Lily Ferguson, Bill Smith Group Cover Art: Mars: U.S. Geological Survey/Photo Researchers, Inc. Arabia Dunes: NASA/ JPL-Caltech/ASU Media Editor: Daniel Sandin Media Project Manager: John Cassar Full-Service Project Management: Integra Cover Printer: Lehigh-Phoenix Color/Hagerstown Pearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world VisitusontheWorldWideWebat: c Pearson Education Limited 2012 The rights of Delores M. Etter and Jeanine A. Ingber to be identified as authors of this work have been asserted by them in accordance with the Copyright, Designs and Patents Act Authorized adaptation from the United States edition, entitled Engineering Problem Solving with C++, 3rd edition, ISBN by Delores M. Etter and Jeanine A. Ingber published by Pearson Education c All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without either the prior written permission of the publisher or a licence permitting restricted copying in the United Kingdom issued by the Copyright Licensing Agency Ltd, Saffron House, 6-10 Kirby Street, London EC1N 8TS. All trademarks used herein are the property of their respective owners. The use of any trademark in this text does not vest in the author or publisher any trademark ownership rights in such trademarks, nor does the use of such trademarks imply any affiliation with or endorsement of this book by such owners. Microsoft R and Windows R are registered trademarks of the Microsoft Corporation in the U.S.A. and other countries. Screen shots and icons reprinted with permission from the Microsoft Corporation. This book is not sponsored or endorsed by or affiliated with the Microsoft Corporation. ISBN 10: ISBN 13: ISBN 13: (Print) (PDF) British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library Typeset in 10/12, TimesNewRoman by Integra Printed and bound by Edwards Brothers in The United States of America The publisher s policy is to use paper manufactured from sustainable forests.

3 Section 4.7 Building C++ Solutions with IDEs: Microsoft Visual C For this example we will select Win32 Console Application. We name the filechapter4_8 and click the OK...button at the bottom of the window. A new Win32 Application Wizard window will appear, as shown below. If the Finish button is selected at this time, a new project will be created with a precompiled header. For simplicity, in this example we want to create an empty project with no added header files, so we click the Next > button at the bottom of the window. The following Finish screen will appear.

4 188 Chapter 4 Control Structures: Repetition From this screen we select Console application and Empty project, then click the Finish button. A new empty project namedchapter4_8 is created, as shown below in the left window of thechapter4_8 Visual C++ project screen.

5 Section 4.7 Building C++ Solutions with IDEs: Microsoft Visual C To add a new file to a project, select Add New Item from the Project menu at the top of the window. The following Add New Item window will appear. Select Code from the left window and C++ file (.cpp) from the right window. Name the file main and click the Add button. The Editor window will open. Enter the code for program chapter4_9, as shown below.

6 190 Chapter 4 Control Structures: Repetition Select Build Solution from the Build menu. If the build is successful, choose Start without Debugging from the Debug menu to execute the program. A Console window will appear, and all standard I/O can be viewed from this window. Results from a run of our program are provided in the screen image below. The number 7 was guessed in only three tries. Are there any numbers that require more than three tries to guess? Modify! Visual C++ and Visual Studio are powerful IDEs with many tools that facilitate the development of large software projects. If you will be working in a Windows environment, we recommend that you view the help materials and tutorials that are provided as part of the Microsoft Visual environment. These problems relate to the programchapter4_9 developed in this section. 1. Modify the program by replacing allswitch statements with if statements. 2. Modify the program by replacing thewhile loop with ado/while loop. 3. Modify the program by having it guess a number between 1 and 100. SUMMARY In this chapter, we have presented techniques for repeating sets of statements that used loops. These loops can be implemented aswhile loopsdo/while loops or asfor loops. These repetition structures are used in most programs.

7 Summary 191 Key Terms counter-controlled loop divide and conquer end-of-data loop flowchart for loop iteration loop loop-control variable pseudocode repetition sentinel-controlled loop while loop C++ Statement Summary while loop: while (degrees <= 360) { radians = degrees*pi/180; cout << degrees << '\t' << radians << endl; degrees += 10; } do/while loop: do { radians = degrees*pi/180; cout << degrees << '\t' << radians << endl; degrees += 10; } while (degrees <= 360); for loop: for (int degrees=0; degrees<=360; degrees+=10) { radians = degrees*pi/180; cout << degrees << '\t' << radians << endl; } break; break statement: continue statement; continue; Notes 1. Indent the statements within a statement block or inside a loop. If loops or compound statements are nested, indent each nested set of statements from the previous statement. 2. Use braces to identify the body of every loop; put each brace on a line by itself so that the body of the loop is easily identified.