STL Sample for deque::rbegin and deque::rend 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 deque::rbegin, deque::rend, and deque::push_back STL functions 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();

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

//////////////////////////////////////////////////////////////////////
//
// 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>

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;
}

5 4 3 2 1

REFERENCES

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