isprint,
isgraph
[printable character predicates]
SYNOPSIS
#include
<ctype.h>
int isprint(int
c);
int isgraph(int
c);
DESCRIPTION
isprint
is a macro which classifies ASCII integer
values by table lookup. It is a predicate returning non-zero for printable
characters, and 0
for other character arguments. It is defined only when isascii(c)
is true or c
is EOF.
You can use a compiled subroutine instead of the macro definition by undefining either macro, using #undef isprint or #undef isgraph.
RETURNS
isprint
returns non-zero if c
is a printing character, (0x20–0x7E).
isgraph
behaves identically to isprint,
except that the space character (0x20)
is excluded.
COMPLIANCE
isprint
and isgraph
are ANSI C.
No supporting OS subroutines are required.
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