Class string provides member function substrm for retrieving a substring from a string. The result is a new string object that is copied from the source string. Figure 18.3 demonstrates substr.

Figure 18.3. Demonstrating string member function substr.

(This item is displayed on pages 890 - 891 in the print version)

 1 // Fig. 18.3: Fig18_03.cpp
 2 // Demonstrating string member function substr.
 3 #include 
 4 using std::cout;
 5 using std::endl;
 7 #include 
 8 using std::string;
10 int main()
11 {
12 string string1( "The airplane landed on time." );
14 // retrieve substring "plane" which
15 // begins at subscript 7 and consists of 5 elements
16 cout << string1.substr( 7, 5 ) << endl;
17 return 0;
18 } // end main

The program declares and initializes a string on line 12. Line 16 uses member function substr to retrieve a substring from string1. The first argument specifies the beginning subscript of the desired substring; the second argument specifies the substring's length.

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


C++ How to Program
C++ How to Program (5th Edition)
ISBN: 0131857576
EAN: 2147483647
Year: 2004
Pages: 627 © 2008-2020.
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