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exception
class exception {
public:
exception() throw();
exception(const exception& rhs) throw();
exception& operator=(const exception& rhs) throw();
virtual ~exception() throw();
virtual const char *what() const throw();
};
The class serves as the base class for all exceptions thrown by certain expressions and by the Standard C++ library. The C string value returned by what``() is left unspecified by the default constructor, but may be defined by the constructors for certain derived classes. None of the member functions throw any exceptions.