Declaring Arrays

Arrays occupy space in memory. The programmer specifies the type of the elements and the number of elements required by an array as follows:

type arrayName [ arraySize ];

and the compiler reserves the appropriate amount of memory. The arraySize must be an integer constant greater than zero. For example, to tell the compiler to reserve 12 elements for integer array c, use the declaration

int c[ 12 ]; // c is an array of 12 integers

Memory can be reserved for several arrays with a single declaration. The following declaration reserves 100 elements for the integer array b and 27 elements for the integer array x.

int b[ 100 ], // b is an array of 100 integers
 x[ 27 ]; // x is an array of 27 integers

Good Programming Practice 7.1

We prefer to declare one array per declaration for readability, modifiability and ease of commenting.

Arrays can be declared to contain values of any non-reference data type. For example, an array of type char can be used to store a character string. Until now, we have used string objects to store character strings. Section 7.4 introduces using character arrays to store strings. Character strings and their similarity to arrays (a relationship C++ inherited from C), and the relationship between pointers and arrays, are discussed in Chapter 8.

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


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


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