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replace_copy
function template
<algorithm>
template < class InputIterator, class OutputIterator, class T >
OutputIterator replace_copy ( InputIterator first, InputIterator last,
OutputIterator result,
const T& old_value, const T& new_value );
Copy range replacing value
Copies the values of the elements in the range [first,last) to the range positions beginning at result, replacing the appearances of old_value by new_value.
The behavior of this function template is equivalent to:
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template < class InputIterator, class OutputIterator, class T >
OutputIterator replace_copy ( InputIterator first, InputIterator last,
OutputIterator result, const T& old_value, const T& new_value )
{
for (; first != last; ++first, ++result)
*result = (*first==old_value)? new_value: *first;
return result;
}
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Parameters
- first, last
- Input iterators to the initial and final positions in a sequence. The range used is [first,last), which contains all the elements between first and last, including the element pointed by first but not the element pointed by last.
- result
- Output iterator to the initial position of the range where the function's results are stored. The range includes as many elements as [first,last).
- old_value
- Value to be replaced.
- new_value
- Replacement value.
Return value
An iterator pointing to the element that follows the last element written in the result sequence.
Example
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// replace_copy example
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main () {
int myints[] = { 10, 20, 30, 30, 20, 10, 10, 20 };
vector<int> myvector (8);
replace_copy (myints, myints+8, myvector.begin(), 20, 99);
cout << "myvector contains:";
for (vector<int>::iterator it=myvector.begin(); it!=myvector.end(); ++it)
cout << " " << *it;
cout << endl;
return 0;
}
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Output:
myvector contains: 10 99 30 30 99 10 10 99
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Complexity
Performs as many comparisons and assignments as the number of elements in the range [first,last).
See also
| remove_copy | Copy range removing value (function template) |
| copy | Copy range of elements (function template) |
| replace | Replace value in range (function template) |
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