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| Summary | #include <ctype.h> int iscntrl ( int c); /* character to test */ |
| Description | The iscntrl function tests c to determine if it is a control character (0x00-0x1F or 0x7F). |
| Return Value | The iscntrl function returns a value of 1 if c is a control character or a value of 0 if it is not. |
| See Also | isalnum, isalpha, isdigit, isgraph, islower, isprint, ispunct, isspace, isupper, isxdigit |
| Example |
#include <ctype.h>
#include <stdio.h> /* for printf */
void tst_iscntrl (void) {
unsigned char i;
char *p;
for (i = 0; i < 128; i++) {
p = (iscntrl (i) ? "YES" : "NO");
printf ("iscntrl (%c) %s\n", i, p);
}
}
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