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[Page 480]

Chapter 9. Classes: A Deeper Look, Part 1

My object all sublime I shall achieve in time.

W. S. Gilbert

Is it a world to hide virtues in?

William Shakespeare

Don't be "consistent," but be simply true.

Oliver Wendell Holmes, Jr.

This above all: to thine own self be true.

William Shakespeare


In this chapter you will learn:

  • How to use a preprocessor wrapper to prevent multiple definition errors caused by including more than one copy of a header file in a source-code file.

  • To understand class scope and accessing class members via the name of an object, a reference to an object or a pointer to an object.

  • To define constructors with default arguments.

  • How destructors are used to perform "termination housekeeping" on an object before it is destroyed.

  • When constructors and destructors are called and the order in which they are called.

  • The logic errors that may occur when a public member function of a class returns a reference to private data.

  • To assign the data members of one object to those of another object by default memberwise assignment.

[Page 481]


9.1 Introduction

9.2 Time Class Case Study

9.3 Class Scope and Accessing Class Members

9.4 Separating Interface from Implementation

9.5 Access Functions and Utility Functions

9.6 Time Class Case Study: Constructors with Default Arguments

9.7 Destructors

9.8 When Constructors and Destructors Are Called

9.9 Time Class Case Study: A Subtle TrapReturning a Reference to a private Data Member

9.10 Default Memberwise Assignment

9.11 Software Reusability

9.12 (Optional) Software Engineering Case Study: Starting to Program the Classes of the ATM System

9.13 Wrap-Up



Self-Review Exercises

Answers to Self-Review Exercises


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