std::exception::what

From Cppreference

C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Utilities library
Error handling
std::exception
Member functions exception::exception exception::~exception exception::operator= exception::what

virtual const char* what() const;

Returns the explanatory string.

[edit] Parameters

(none)

[edit] Return value

Pointer to a null-terminated string with explanatory information.

[edit] Exceptions