Function hypotenuse

Examples/Modules/Chapter 11/Ex11_08/Ex11_08.cpp:9–16

Make names from the math namespace available locally */ Note: text uses hypot(), but this causes ambiguities with hypot() function of with Visual Studio

// Note: text uses hypot(), but this causes ambiguities with hypot() 
// function of <cmath> with Visual Studio
auto hypotenuse(const auto& x, const auto& y)
{
  using namespace math;
  // Or:
  //   using math::square;
  //   using math::sqrt;    /* Same as, of course: using std::sqrt; */
  return sqrt(square(x) + square(y));
}

int main()
{