STL Sample for the basic_string::append Functions

• The Standard C++ Library included with: - Microsoft Visual C++, 32-bit Edition, version 4.2

SUMMARY

The sample code below illustrates how to use the basic_string::append STL functions in Visual C++.

MORE INFORMATION

Required Header

  <xstring>

Prototypes

   basic_string& append(const basic_string& _X);

   basic_string& append(const basic_string& _X, size_type pos,
                        size_type count);

   basic_string& append(const element_type *_S, size_type count);

   basic_string& append(const element_type *_S);

   basic_string& append(size_type count, element_type _C);

   basic_string& append(Iterator first, Iterator last);

Description

The append member functions of the basic_string append elements to the end of the string. The different forms of the function provide alternate ways to specify the source of the elements that will be appended.

The append functions return a reference to the string to which the elements were appended.

Sample Code

//////////////////////////////////////////////////////////////////////
//
// Compile options needed: /GX
//
// bsappend.cpp : Illustrates how to use the basic_string append member
//                function.
//
// Functions:
//
//    basic_string::append - appends a sequence of elements to the
//                           current string.
//
// Written by Michael Reeves
// of Microsoft Product Support Services,
// Copyright (c) 1996 Microsoft Corporation. All rights reserved.
//////////////////////////////////////////////////////////////////////

#include <xstring>
#include <iostream>

                     allocator<char> > test_string;

void main()

    test_string str1("012");
    test_string str2("345");

    cout << "str1 = " << str1.c_str() << endl;

    // append str2 to str1
    str1.append(str2);

    cout << "str1 = " << str1.c_str() << endl;

    // append the last 2 items in str2 to str1
    str2 = "567";
    str1.append(str2, 1, 2);    // begin at pos 1, append 2 elements

    cout << "str1 = " << str1.c_str() << endl;

    // append the first 2 items from an array of the element type
    char achTest[] = {'8', '9', 'A'};
    str1.append(achTest, 2);

    cout << "str1 = " << str1.c_str() << endl;

    // append all of a string literal to str1
    char szTest[] = "ABC";
    str1.append(szTest);

    cout << "str1 = " << str1.c_str() << endl;

    // append one item of the element type
    str1.append(1, 'D');

    cout << "str1 = " << str1.c_str() << endl;

    // append str2 to str1 using iterators
    str2 = "EF";
    str1.append (str2.begin(), str2.end());

    cout << "str1 = " << str1.c_str() << endl;

Program Output is:

str1 = 012 str1 = 012345 str1 = 01234567 str1 = 0123456789 str1 = 0123456789ABC str1 = 0123456789ABCD str1 = 0123456789ABCDEF

REFERENCES

Visual C++ Books On Line: Visual C++ Books:C/C++:Standard C++ Library Reference.