Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.
isupper - Determines whether a character is upper case.
#include <locale> template <class charT> bool isupper (charT c, const locale& loc) const;
The isupper_function returns true if the character passed as a parameter is upper case. Otherwise the function returns false. The check is made using the ctype facet from the locale parameter.
Other 'is' functions, locale, ctype