Microsoft KB Archive/156741

= How to use the replace Standard Template Library (STL) function in Visual C++ =

Article ID: 156741

Article Last Modified on 7/13/2005

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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</li></ul>

 Microsoft Visual C++ 5.0 Professional Edition</li></ul>

 Microsoft Visual C++ 6.0 Professional Edition</li></ul>

 Microsoft Visual C++ 6.0 Standard Edition</li></ul>

 Microsoft Visual C++ .NET 2003 Standard Edition</li></ul>

 Microsoft Visual C++ .NET 2002 Standard Edition</li></ul> </li></ul>

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This article was previously published under Q156741

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

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Prototype
template<class ForwardIterator, class Type> inline void remove(ForwardIterator first,

ForwardIterator last, const T& old_value, const T& new_value) Note The class/parameter names in the prototype do not match the version in the header file. Some have been modified to improve readability.

Description
The replace algorithm replaces all elements that match old_value from the range [first, last) with new_value.

Sample code
Note In the first line of the sample code section, /GX is equivalent to /EHsc in VC++ .NET and is set by default. ////////////////////////////////////////////////////////////////////// // // Compile options needed: /GX // // replace.cpp : Illustrates how to use the replace function. // // Functions: // //   replace - Replace all elements from the sequence that match value //             with another value. // // 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


 * 1) pragma warning(disable: 4786)


 * 1) include
 * 2) include
 * 3) include
 * 4) include

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

void main

{

const int VECTOR_SIZE = 8 ;

// Define a template class vector of integers typedef vector<int, allocator > IntVector ;

//Define an iterator for template class vector of integer typedef IntVector::iterator IntVectorIt ;

IntVector Numbers(VECTOR_SIZE) ;  //vector containing numbers

IntVectorIt start, end, it ;

start = Numbers.begin ;  // location of first // element of Numbers

end = Numbers.end ;      // one past the location // last element of Numbers

//Initialize vector Numbers Numbers[0] = 10 ; Numbers[1] = 20 ; Numbers[2] = 10 ; Numbers[3] = 15 ; Numbers[4] = 12 ; Numbers[5] = 7 ; Numbers[6] = 9 ; Numbers[7] = 10 ;

cout << "Before calling replace" << endl ;

// print content of Numbers cout << "Numbers { " ; for(it = start; it != end; it++) cout << *it << " " ; cout << " }\n" << endl ;

// remove all elements from Numbers that match 10 replace(start, end, 10, 35) ;

cout << "After calling replace, to replace all 10's with 35" << endl ;

// print content of Numbers cout << "Numbers { " ; for(it = start; it != end; it++) cout << *it << " " ; cout << " }\n" << endl ;

} Program Output is: <pre class="fixed_text">Before calling replace Numbers { 10 20 10 15 12 7 9 10 }

After calling replace, to replace all 10's with 35 Numbers { 35 20 35 15 12 7 9 35 }

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