This documentation is copyright © 1998-2001 Sandro Sigala <sandro@sigala.it>.
All rights reserved.

Released under the GNU General Public License.

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iscntrl

Prototype

#include <ctype.h>

int iscntrl(int c);

Description

Returns a true value if the c character is a control character.

Example

View source
#include <ctype.h>
#include <stdio.h>

/*
 * Get the next character from the standard input skipping the
 * control characters.
 */
int xgetchar(void)
{
    int c;
    while (iscntrl(c = getchar()))
	;
    return c;
}

References

ISO C 9899:1990 7.3.1.3