The header file provides the following functionality:

Macros

int isdigit( int c );
int isgraph( int c );
int islower( int c );
int isprint( int c );
int isupper( int c );

Functions

int isalnum( int c );
int isalpha( int c );
int iscntrl( int c );
int ispunct( int c );
int isspace( int c );
int isxdigit( int c );

int tolower( int c );
int toupper( int c );

Limitations

Only single-byte ASCII characters are supported.

Missing

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Additions

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Notes

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