std::plus is a functor that encapsulates operator+.


#include  <vector>

#include <algorithm>

#include <numeric>



const std::vector<int> AddTwo(const std::vector<int>& v)

{

  std::vector<int> v_new;

  std::transform(v.begin(),v.end(),std::back_inserter(v_new),

    std::bind2nd(std::plus<int>(),2));

  return v_new;

}

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(C++) std::plus