The sample code below illustrates how to use the remove STL
function in Visual C++.
Required header
Prototype
template<class ForwardIterator, class Type> inline
void remove(ForwardIterator first,
ForwardIterator last,
const T& old_value,
const T& new_value)
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
#pragma warning(disable: 4786)
#include <iostream>
#include <vector>
#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 integers
typedef vector<int, allocator<int> > 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:
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 }
For more information about the replace algorithm, visit the
following Microsoft Developer Network (MSDN) Web site:
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