int __iscsym( int c ); int __iscsymf( int c );
- Integer to test. c should be in the range of 0-127.
__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.
|__iscsym||<ctype.h>||Win 98, Win Me, Win NT, Win 2000, Win XP|
|__iscsymf||<ctype.h>||Win 98, Win Me, Win NT, Win 2000, Win XP|
For additional compatibility information, see Compatibility in the Introduction.
All versions of the C run-time libraries.