INFO: STL Sample for the reverse Function

• The Standard C++ Library, used with:
  • Microsoft Visual C++, 32-bit Editions, versions 4.2, 5.0, 6.0

SUMMARY

The sample code below illustrates how to use the reverse STL function in Visual C++.

MORE INFORMATION

Required Header

   <algorithm> 

Prototype

   template<class BidirectionalIterator> inline
   void reverse(BidirectionalIterator first,

                      BidirectionalIterator last) 

Description

Sample Code

////////////////////////////////////////////////////////////////////// 
// 
// Compile options needed: /GX
// 
// reverse.cpp : Illustrates how to use the reverse function.
// 
// Functions:
// 
//    reverse - Reverse the items in a sequence.
// 
// Written by Kalindi Sanghrajka
// of Microsoft Product Support Services,
// Software Core Developer Support.
// Copyright (c) 1996 Microsoft Corporation. All rights reserved.
////////////////////////////////////////////////////////////////////// 

// disable warning C4786: symbol greater than 255 character,
// okay to ignore

#pragma warning(disable: 4786)

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <functional>

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

void main()

{

    const int VECTOR_SIZE = 8 ;

    // Define a template class vector of strings
    typedef vector<string, allocator<string> > StrVector ;

    //Define an iterator for template class vector of strings
    typedef StrVector::iterator StrVectorIt ;

    StrVector Tongue_Twister(VECTOR_SIZE) ;

    StrVectorIt start, end, it ;

    start = Tongue_Twister.begin() ;   // location of first
                                      // element of Tongue_Twister

    end = Tongue_Twister.end() ;       // one past the location last
                                       // element of Tongue_Twister

    //Initialize vector Tongue_Twister
    Tongue_Twister[0] = "she" ;
    Tongue_Twister[1] = "sells" ;
    Tongue_Twister[2] = "sea" ;
    Tongue_Twister[3] = "shells" ;
    Tongue_Twister[4] = "by";
    Tongue_Twister[5] = "the";
    Tongue_Twister[6] = "sea" ;
    Tongue_Twister[7] = "shore" ;

    cout << "Before calling reverse \n" << endl ;

    // print content of Tongue_Twister
    cout << "Try this Tongue Twister: " ;
    for(it = start; it != end; it++)
        cout << *it << " " ;
    cout << "\n\n" ;

    // reverse the items in the vector Tongue_Twister
     reverse(start, end) ;

     cout << "After calling reverse \n" << endl ;

    // print content of Tongue_Twister
    cout << "Now try the reversed Tongue Twister: " ;
    for(it = start; it != end; it++)
        cout << *it << " " ;
    cout << "\n\n" ;

} 

Before calling reverse

Try this Tongue Twister: she sells sea shells by the sea shore

After calling reverse

Now try the reversed Tongue Twister: shore sea the by shells sea sells she 

REFERENCES

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

Additional query words: STL STLSample reverse

Keywords : kbcode kbVC420 kbVC500 kbVC600 kbDSupport STLIss
Version : winnt:4.2,5.0,6.0
Platform : winnt
Issue type : kbinfo