#include <vector>
#include <algorithm>
#include <numeric>

//From http://www.richelbilderbeek.nl/CppReciprocal.htm
void Reciprocal(std::vector<double>& v)
{
  std::transform(v.begin(),v.end(),v.begin(),
    std::bind1st(std::divides<double>(),1.0));    
}