digittointisalnumisalphaisasciiisblankiscntrlisdigitisgraphishexnumberisideogramislowerisnumberisphonogramisprintispunctisruneisspaceisspecialisupperisxdigittoasciitolowertoupper
- character classification macros
LIBRARY
Lb libc
SYNOPSIS
#include <ctype.h> int
digittoint (int c); int
isalnum (int c); int
isalpha (int c); int
isascii (int c); int
iscntrl (int c); int
isdigit (int c); int
isgraph (int c); int
ishexnumber (int c); int
isideogram (int c); int
islower (int c); int
isnumber (int c); int
isphonogram (int c); int
isspecial (int c); int
isprint (int c); int
ispunct (int c); int
isrune (int c); int
isspace (int c); int
isupper (int c); int
isxdigit (int c); int
toascii (int c); int
tolower (int c); int
toupper (int c);
DESCRIPTION
The above functions perform character tests and conversions on the integer
Fa c .
They are available as macros, defined in the include file
In ctype.h ,
or as true functions in the C library.
See the specific manual pages for more information.
These functions, except for
digittoint (,);
isascii (,);
ishexnumber (,);
isideogram (,);
isnumber (,);
isphonogram (,);
isrune (,);
isspecial ();
and
toascii (,);
conform to
St -isoC .