Zilog ZUSBOPTS - Manual (Page 449)

UM017105-0511 Standard Functions
Zilog Developer Studio II – ZNEO™
User Manual
421
isgraph
Tests for any printing character except space (' ').
Synopsis
#include <ctype.h>

int isgraph(int c);
Example
int r;

char c='';

r=isgraph(c);
islower
Tests for any lowercase letter 'a' to 'z'.
Synopsis
#include <ctype.h>

int islower(int c);
Example
int r;

char c='a';

r=islower(c);
isprint
Tests for any printing character including space (' ').
Synopsis
#include <ctype.h>

int isprint(int c);
Example
int r;

char c='1';

r=isprint(c);