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How to use the "deque::rbegin" STL function, the "deque::rend" STL function, and the "deque::push_back" STL function in Visual C++

Article ID: 156592

Article Last Modified on 1/18/2006

APPLIES TO

The Standard C++ Library, when used with:
- Microsoft Visual C++ 4.2 Enterprise Edition
- Microsoft Visual C++ 5.0 Enterprise Edition
- Microsoft Visual C++ 6.0 Enterprise Edition
- Microsoft Visual C++ 4.2 Professional Edition
- Microsoft Visual C++ 5.0 Professional Edition
- Microsoft Visual C++ 6.0 Professional Edition
- Microsoft Visual C++ 6.0 Standard Edition
- Microsoft Visual C++ 2005 Express Edition
- Microsoft Visual C++ .NET 2003 Standard Edition
- Microsoft Visual C++ .NET 2002 Standard Edition

This article was previously published under Q156592

SUMMARY

The following sample code illustrates how to use the deque::rbegin STL function, the deque::rend STL function, and the deque::push_back STL function in Visual C++.

MORE INFORMATION

Required Header

   < deque>

Prototype

   const_reverse_iterator rbegin() const;
   reverse_iterator rbegin();

   const_reverse_iterator rend() const;
   reverse_iterator rend();

NOTE: The class/parameter names in the prototype may not match the version in the header file. Some have been modified to improve readability.

Description

The rbegin member function returns a reverse iterator that points just beyond the end of the controlled sequence. Therefore, it designates the beginning of the reverse sequence.

The rend member function returns a reverse iterator that points at the first element of the sequence, or just beyond the end of an empty sequence. Therefore, it designates the end of the reverse sequence.

Sample Code

NOTE: In the first line of the sample code section, /GX is equivalent to /EHsc in Visual C++ .NET and in Visual C++ 2005 and is set by default.

////////////////////////////////////////////////////////////////////// 
// 
// Compile options needed: -GX
// 
// deque.cpp :
// 
// Functions:
// 
//    rbegin
//    rend
//    push_back
// 
// Written by Bobby Mattappally
// of Microsoft Product Support Services,
// Copyright (c) 1996 Microsoft Corporation. All rights reserved.
////////////////////////////////////////////////////////////////////// 

/* Compile options needed:-GX
*/ 
#include <iostream>
#include <deque>

#if _MSC_VER > 1020   // if VC++ version is > 4.2
   using namespace std;  // std c++ libs implemented in std
   #endif

typedef deque<int, allocator<int> >  INTDEQUE;

void main()

{

    // Create A and fill it with elements 1,2,3,4 and 5
    // using push_back function

    INTDEQUE  A;
    A.push_back(1);
    A.push_back(2);
    A.push_back(3);
    A.push_back(4);
    A.push_back(5);

    // Now print the contents in reverse order using reverse_iterator
    // and functions rbegin() and rend()

    INTDEQUE::reverse_iterator rpi;

    for(rpi= A.rbegin();  rpi !=A.rend(); rpi++)
    {
        cout << *rpi <<" " ;
    }
        cout<<endl;

}

Program Output is:

5 4 3 2 1

REFERENCES

For more information about deque::push_back, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcstdlib/html/vcsampsampledequeccpushbackanddequeccpopbackstlsample.asp

For more information about deque::rbegin and deque::rend, visit the following MSDN Web site:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcstdlib/html/vcsampsampledequeccrbeginanddequeccrendstlsample.asp

Additional query words: STL STLSample rbegin rend reverse_iterator push_back

Keywords: kbhowto kbinfo kbsample kbcode KB156592

Microsoft KB Archive/156592

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