No characters in the alpha or print classes are included. Includes all characters in the digit and punct classes. No characters in cntrl , digit , punct , or space are included. All characters in the graph class are included, but no characters in cntrl are included. No characters in the alpha , digit , or cntrl classes, or the space character are included.
Parameters WC Specifies a wide character for testing.
The iswctype subroutine, setlocale subroutine, towlower subroutine, towupper subroutine wctype subroutine.