This documentation is copyright © 1998-2001 Sandro Sigala <sandro@sigala.it>.
All rights reserved.
Released under the GNU General Public License.
isspace
Prototype
#include <ctype.h>
int isspace(int c);
Description
In the ``C'' locale, returns a true value if the c
character is a
standard white-space character
(space ' '
, form feed '\f'
, new line '\n'
, carriage return
'\r'
, horizontal tab '\t'
, and vertical tab '\v'
). In other
implementation-defined set of characters returns true
for the characters for which isalnum
is false.
Example
#include <ctype.h>
#include <stdio.h>
/*
* Get the next token separated by white spaces from the
* standard input.
*/
char *gettoken(char *buf)
{
char *dp = buf;
int c;
while (isspace(c = getchar()))
; /* Skip white spaces. */
if (c == EOF)
return NULL;
do
*dp++ = c;
while (!isspace(c = getchar()));
*dp = '\0';
return buf;
}
References
ISO C 9899:1990 7.3.1.9