std::fill is an STL algorithm to assign values to a container.


#include <algorithm>

#include <cassert>

#include <numeric>

#include <vector>



int main()

{

  //Create a std::vector storing '1' 10x

  std::vector<int> v(10,1);

  //10 x 1 = 10

  assert(std::accumulate(v.begin(),v.end(),0)==10);

  //Fill the std::vector with '2'

  std::fill(v.begin(),v.end(),2);

  //10 x 2 = 20

  assert(std::accumulate(v.begin(),v.end(),0)==20);

}

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(C++) std::fill