Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Expand Minimize
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.


Determines a classification rule for wide-character codes.

wctype_t wctype(
   const char * property 


Property string.

If the LC_CTYPE category of the current locale does not define a classification rule whose name matches the property string property, the function returns zero. Otherwise, it returns a nonzero value suitable for use as the second argument to a subsequent call to towctrans.

The function determines a classification rule for wide-character codes. The following pairs of calls have the same behavior in all locales (but an implementation can define additional classification rules even in the "C" locale):


Same as

iswalnum( c )

iswctype( c, wctype( "alnum" ) )

iswalpha( c )

iswctype( c, wctype( "alpha" ) )

iswcntrl( c )

iswctype( c, wctype( "cntrl" ) )

iswdigit( c )

iswctype( c, wctype( "digit" ) )

iswgraph( c )

iswctype( c, wctype( "graph" ) )

iswlower( c )

iswctype( c, wctype( "lower" ) )

iswprint( c )

iswctype( c, wctype( "print" ) )

iswpunct( c )

iswctype( c, wctype( "punct" ) )

iswspace( c )

iswctype( c, wctype( "space" ) )

iswupper( c )

iswctype( c, wctype( "upper" ) )

iswxdigit( c )

iswctype( c, wctype( "xdigit" ) )


Required header



For additional compatibility information, see Compatibility in the Introduction.

Community Additions

© 2015 Microsoft