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)). isspace : whitespace character predicate

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**Authoritative source**: BUSMASTER DITA help source `ispunct.dita`, compiled into `BUSMASTER.CHM` with the application.