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ispunct
[punctuation character predicate]

SYNOPSIS
#include <ctype.h>
int ispunct(int c);

DESCRIPTION
ispunct is a macro which classifies ASCII integer values by table lookup. It is a predicate returning non-zero for printable punctuation characters, and 0 for other characters. 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 the macro using #undef ispunct.

RETURNS
ispunct returns non-zero if c is a printable punctuation character (isgraph(c) && !isalnum(c)).

COMPLIANCE
ispunct is ANSI C.

No supporting OS subroutines are required.