isgraph() -- ctype Function (libc)

Check if a character is printable
#include <ctype.h>
int isgraph(int c);

isgraph() tests whether c is  a printable letter within the ASCII character
set,  but  excluding the  space  character.  The  ANSI  Standard defines  a
printable character as any character that occupies one printing position on
an output device.   c must be a value that  is representable as an unsigned
char or EOF.

isgraph() returns nonzero if c is a printable character (except for space),
and zero if it is not.

See Also

ASCII,
libc
ANSI Standard, 7.3.1.5
POSIX Standard, §8.1

© 2012 by Stephen A. Ness