Introduction

This chapter discusses one of the most powerful features of the C++ programming language, the pointer. In Chapter 6, we saw that references can be used to perform pass-by-reference. Pointers also enable pass-by-reference and can be used to create and manipulate dynamic data structures (i.e., data structures that can grow and shrink), such as linked lists, queues, stacks and trees. This chapter explains basic pointer concepts and reinforces the intimate relationship among arrays and pointers. The view of arrays as pointers derives from the C programming language. As we saw in Chapter 7, C++ Standard Library class vector provides an implementation of arrays as full-fledged objects.

Similarly, C++ actually offers two types of stringsstring class objects (which we have been using since Chapter 3) and C-style, char * pointer-based strings. This chapter on pointers discusses char * strings to deepen your knowledge of pointers. In fact, the null-terminated strings that we introduced in Section 7.4 and used in Fig. 7.12 are char * pointer-based strings. This chapter also includes a substantial collection of string-processing exercises that use char *strings. C-style, char * pointer-based strings are widely used in legacy C and C++ systems. So, if you work with legacy C or C++ systems, you may be required to manipulate these char * pointer-based strings.

We will examine the use of pointers with classes in Chapter 13, Object-Oriented Programming: Polymorphism, where we will see that the so-called "polymorphic processing" of object-oriented programming is performed with pointers and references. Chapter 21, Data Structures, presents examples of creating and using dynamic data structures that are implemented with pointers.


Introduction to Computers, the Internet and World Wide Web

Introduction to C++ Programming

Introduction to Classes and Objects

Control Statements: Part 1

Control Statements: Part 2

Functions and an Introduction to Recursion

Arrays and Vectors

Pointers and Pointer-Based Strings

Classes: A Deeper Look, Part 1

Classes: A Deeper Look, Part 2

Operator Overloading; String and Array Objects

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Templates

Stream Input/Output

Exception Handling

File Processing

Class string and String Stream Processing

Web Programming

Searching and Sorting

Data Structures

Bits, Characters, C-Strings and structs

Standard Template Library (STL)

Other Topics

Appendix A. Operator Precedence and Associativity Chart

Appendix B. ASCII Character Set

Appendix C. Fundamental Types

Appendix D. Number Systems

Appendix E. C Legacy Code Topics

Appendix F. Preprocessor

Appendix G. ATM Case Study Code

Appendix H. UML 2: Additional Diagram Types

Appendix I. C++ Internet and Web Resources

Appendix J. Introduction to XHTML

Appendix K. XHTML Special Characters

Appendix L. Using the Visual Studio .NET Debugger

Appendix M. Using the GNU C++ Debugger

Bibliography



C++ How to Program
C++ How to Program (5th Edition)
ISBN: 0131857576
EAN: 2147483647
Year: 2004
Pages: 627

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