Ispunct, Isspace, Isupper – Zilog ZUSBOPTS User Manual
Page 450: Ispunct isspace isupper, Synopsis, Example

Standard Functions
UM017105-0511
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Zilog Developer Studio II – ZNEO™
User Manual
ispunct
Tests for any printing character except space (' ') or a character for which
isalnum
is true.
Synopsis
#include
int ispunct(int c);
Example
int r;
char c='a';
r=ispunct(c);
isspace
Tests for the following white-space characters: space (' '), form feed ('\f'), new line ('\n'),
carriage return ('\r'), horizontal tab ('\t'), or vertical tab ('\v').
Synopsis
#include
int isspace(int c);
Example
int r;
char c='';
r=isspace(c);
isupper
Tests for any uppercase letter 'A' to 'Z'.
Synopsis
#include
int isupper(int c);
Example
int r;
char c='a';
r=isupper(c);