C++ Programming Code Examples
C++ > Visual C++ 5.0 Standard C++ Library Code Examples
The replace algorithm replaces all elements that match old value from the range
The replace algorithm replaces all elements that match old value from the range
replace
Header
<algorithm>
template<class ForwardIterator, class Type> inline
void remove(ForwardIterator first, ForwardIterator last, const T& old_value, const T& new_value)
The replace algorithm replaces all elements that match old_value from the range [first, last) with new_value.
Sample
// disable warning C4786: symbol greater than 255 characters,
// okay to ignore
#pragma warning(disable: 4786)
#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
using namespace std;
void main()
{
const int VECTOR_SIZE = 8 ;
// Define a template class vector of integers
typedef vector<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
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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