isspace - C ctype.h

Type

function

From

<cctype> 
<ctype.h>

Description

Check if character is a white-space

For the C locale, white-space characters are any of:

Char	Value	Meaning
' '	(0x20)	space (SPC)
'\t'	(0x09)	horizontal tab (TAB)
'\n'	(0x0a)	newline (LF)
'\v'	(0x0b)	vertical tab (VT)
'\f'	(0x0c)	feed (FF)
'\r'	(0x0d)	carriage return (CR)

Prototype

int isspace ( int c );

Parameters

Parameter	Description
c	Character to be checked, casted to an int, or EOF.

Return Value

A non zero value (i.e., true) if indeed c is a white-space character. Zero (i.e., false) otherwise.

Example

The following code prints out the C string character by character, replacing any white-space character by a newline character.

Demo Code

#include <stdio.h>
#include <ctype.h>
int main ()/*  www  . j  a va 2  s. c  o m*/
{
  char c;
  int i=0;
  char str[]="this is a test. Example \tsentence to test isspace\n";
  while (str[i])
  {
    c=str[i];
    if (isspace(c)) 
       c='\n';
    putchar (c);
    i++;
  }
  return 0;
}