When do I use fabs and when is it sufficient to use std::abs?
c++, cmath, math.h
Solution
In C++, it's always sufficient to use `std::abs`; it's overloaded for all the numerical types.
In C, `abs` only works on integers, and you need `fabs` for floating point values. These are available in C++ (along with all of the C library), but there's no need to use them.
Problem
I assume that `abs` and `fabs` are behaving different when using `math.h`. But when I use just `cmath` and `std::abs`, do I have to use `std::fabs` or `fabs`? Or isn't this defined?