int __iscsym( int c );
int __iscsymf( int c );
| Routine | Required Header | Compatibility |
| __iscsym | <ctype.h> | Win 95, Win NT |
| __iscsymf | <ctype.h> | Win 95, Win NT |
For additional compatibility information, see Compatibility in the Introduction.
Libraries
| LIBC.LIB | Single thread static library, retail version |
| LIBCMT.LIB | Multithread static library, retail version |
| MSVCRT.LIB | Import library for MSVCRT.DLL, retail version |
Return Value
__iscsym returns a non-zero value if c is a letter, underscore, or digit. __iscsymf returns a non-zero value if c is a letter or an underscore. Each of these routines returns 0 if c does not satisfy the test condition.
The result of the test condition for the __iscsym function depends on the LC_CTYPE category setting of the current locale; see setlocale for more information. For __iscsymf, the result of the test condition is independent of locale.
Parameter
c
Integer to test
Character Classification Routines | Locale Routines | is, isw Function Overview