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

Pretty good explanation form cplusplus.com:

Generally, the domain of a mathematical function is the subset of values that it is defined for. For example, the square root function is only defined for non-negative numbers. Thus, a negative number for such a function would be a domain error.