int _ismbcalnum( unsigned int c );
int _ismbcalpha( unsigned int c );
int _ismbcdigit( unsigned int c );
| Routine | Required Header | Compatibility |
| _ismbcalnum | <mbstring.h> | Win 95, Win NT |
| _ismbcalpha | <mbstring.h> | Win 95, Win NT |
| _ismbcdigit | <mbstring.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
Each of these routines returns a nonzero value if the character satisfies the test condition or 0 if it does not. If c<= 255 and there is a corresponding _ismbb routine (for example, _ismbcalnum corresponds to _ismbbalnum), the result is the return value of the corresponding _ismbb routine.
Parameter
c
Character to be tested
Remarks
Each of these routines tests a given multibyte character for a given condition.
| Routine | Test Condition | Code Page 932 Example |
| _ismbcalnum | Alphanumeric | Returns true if and only if c is a single-byte representation of an ASCII English letter: See examples for _ismbcdigit and _ismbcalpha. |
| _ismbcalpha | Alphabetic | Returns true if and only if c is a single-byte representation of an ASCII English letter: 0x41<=c<=0x5A or 0x61<=c<=0x7A; or a Katakana letter: 0xA6<=c<=0xDF. |
| _ismbcdigit | Digit | Returns true if and only if c is a single-byte representation of an ASCII digit: 0x30<=c<=0x39. |
Character Classification Routines | _ismbc Function Overview
See Also is, isw Function Overview, _ismbb Function Overview