what is a domain error

Question

in c++, has a base class for \'domain errors\', std::domain_error. i don\'t understand under what circumstances i should throw a domain error in my code. all

Answer 1

Well, this is all the guidance you get from the C++ standard:

The class domain_error defines the type of objects thrown as exceptions by the implementation to report domain errors.

Domain here means "problem domain", nothing to do with the internet. For example, a square root function might throw a domain error if passed a negative number.