iswalpha - test for alphabetic wide character

Syntax

#include <wchar.h> int iswalpha(wint_t wc);

Description iswalpha tests whether the wide character wc is alphabetic, i.e. a letter.

	In all cases, wc is an argument of type wint_t, the value of which must be a wide character code corresponding to a valid character in the current locale or must equal the value of the macro WEOF. If the argument wc has any other value, the behavior is undefined.
Return val.	!= 0 0	Alphabetic Not alphabetic
Notes	iswalpha() is implemented both as a function and as a macro. To generate a function call, the definition of the macro name must be first undefined (#undef iswalpha). The behavior of iswalpha() is determined by the class alpha of the current locale. The current locale is the C locale, unless it was explicitly changed using setlocale(). Restriction This version of the C runtime system only supports 1-byte characters as wide character codes. They are of type wchar_t (see stddef.h). (End)
See also	iswalnum(), iswcntrl(), iswdigit(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(), iswxdigit(), setlocale(), wchar.h, stdio.h.