/*FUNCTION	<<iswupper>>---upper-case wide-character testINDEX	iswupperANSI_SYNOPSIS	#include <wctype.h>	int iswupper(wint_t <[c]>);TRAD_SYNOPSIS	#include <wctype.h>	int iswupper(<[c]>)	wint_t <[c]>;DESCRIPTION<<iswupper>> is a function which classifies wide-character values thathave an upper-case translation.RETURNS<<iswupper>> returns non-zero if <[c]> is a upper-case wide-character.PORTABILITY<<iswupper>> is C99.No supporting OS subroutines are required.*/#include <_ansi.h>#include <wctype.h>int_DEFUN(iswupper,(c),wint_t c){  return (towlower (c) != c);}