fill_n

template < class OutputIterator, class Size, class T >
  void fill_n ( OutputIterator first, Size n, const T& value )
{
  for (; n>0; --n)  *first++ = value;
}

// fill_n example
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main () {
  vector<int> myvector (8,10);        // myvector: 10 10 10 10 10 10 10 10
  fill_n (myvector.begin(),4,20);     // myvector: 20 20 20 20 10 10 10 10
  fill_n (myvector.begin()+3,3,33);   // myvector: 20 20 20 33 33 33 10 10
  cout << "myvector contains:";
  for (vector<int>::iterator it=myvector.begin(); it!=myvector.end(); ++it)
    cout << " " << *it;
  cout << endl;
 
  return 0;
}