Borland C++ reference
Borland C++ 3.1 › <ctype.h>

isspace

raw OCR

Character classification macro.

Defined in header <ctype.h>

Syntax

#include <ctype.h>
int isspace(int c);

Portability

DOSUNIXWindowsANSI CC++ only
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Remarks

isspace is a macro that classifies ASCII-coded integer values by table lookup. It is a predicate returning nonzero for true and 0 for false. It is defined only when isascii(c) is true or c is EOF.

You can make this macro available as a function by undefining (#undef) it.

Return value

isspace returns nonzero if c is a space, tab, carriage return, new line, vertical tab, or formfeed (0x09 to OxOD, 0x20).

Example

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

int main(void)
{
   char c = 'C ';
   if (isspace(c))
      printf("%c is white  space\n",c);
   else
      printf("%c isn't white  space\n",c);
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

These are search links, not yet checked by hand.

Stable link: /3.1/ctype.h/isspace/ · short form /3.1/isspace/