How to divide by zero without error

Question

i need to obtain float NaN and infinity, but i can't use such constructions

0. / 0.
1. / 0.

because it cause compile time

error C2124: divide or mod by zero

EDIT, it is cool to have answers for where i can get this numbers (+1 for every), but is it possible to divide by zero?

Answer 1

You can simply return a NaN or an infinity, for example:

return std::numeric_limits<float>::quiet_NaN();

or

return std::numeric_limits<float>::infinity();

See std::numeric_limits , from header <limits> .

Answer 2

从<limits>使用std :: numeric_limits :: infinity（）和std :: numeric_limits :: quiet_NaN（）或std :: numeric_limits :: signaling_NaN（） 。