fill_n

Header

template<class OutputIterator, class Size, class T>
void fill_n(OutputIterator first, Size n, const T& value)

Assign n items to value, starting at position first.

Sample

#pragma warning (disable:4786)

#include <algorithm>
#include <iostream>

int main()
{

	int ai[10] = {10, 20, 30, 40, 50, 60, 70, 80, 90, 100} ;

	std::ostream_iterator<int> intOstreamIt(std::cout, ", ") ;
	
	std::cout << "ai = " ;
	std::copy(ai, ai+10, intOstreamIt ) ;
	std::cout << std::endl ;

	//fill first 5 elements of ai with value 25
	std::fill_n(ai, 5, 25) ;

	std::cout << "ai, after calling fill_n = " ;
	std::copy(ai, ai+10, intOstreamIt ) ;
	std::cout << std::endl ;

	return 0 ;
}

Program Output

ai = 10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
ai, after calling fill_n = 25, 25, 25, 25, 25, 60, 70, 80, 90, 100,