Function shift_range

Exercises/Modules/Chapter 09/Soln9_03.cpp:60–65

}

std::span<double> shift_range(std::span<double> data, double delta)
{
  for (size_t i {}; i < data.size(); ++i)
    data[i] += delta;
  return data;
}

std::optional<double> largest(std::span<const double> data)
{