Zilog ZUSBOPTS Manuale Utente Pagina 448

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Standard Functions UM017105-0511
420
Zilog Developer Studio II – ZNEO™
User Manual
isalpha
Tests for any character for which isupper or islower is true.
Synopsis
#include <ctype.h>
int isalpha(int c);
Example
int r;
char c='a';
r=isalpha(c);
iscntrl
Tests for any control character.
Synopsis
#include <ctype.h>
int iscntrl(int c);
Example
int r;
char c=NULL;
r=iscntrl(c);
isdigit
Tests for any decimal digit.
Synopsis
#include <ctype.h>
int isdigit(int c);
Example
int r;
char c='4';
r=isdigit(c);
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