std::fill_n
From Cppreference
| Defined in header
<algorithm> | ||
| template< class OutputIterator, class Size, class T >
void fill( OutputIterator first, Size count, const T& value ); | ||
Assigns the given value value to the first count elements in the range beginning at first.
Contents |
Parameters
| first | - | the beginning of the range of elements to modify |
| count | - | number of elements to modify |
| value | - | the value to be assigned |
Return value
(none)
Complexity
linear in count
Equivalent function
template<class OutputIterator, class Size, class T> void fill(OutputIterator first, Size count, const T& value) { for (Size i = 0; i < count; i++) { *first++ = value; } }
Example
The following code uses fill_n() to assign -1 to the first half of a vector of integers:
#include <algorithm> #include <vector> #include <iostream> int main() { int data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 } std::vector<int> v1(data, data+10); std::fill_n(v1.begin(), 5, -1); for (vector<int>::iterator it = v1.begin(); it != v1.end(); ++it) { std::cout << *it << " "; } return 0; }
Output:
-1 -1 -1 -1 -1 5 6 7 8 9
See also
| assigns a range of elements a certain value (function template) | |
