isascii, iswascii

Remonter à Ctype.h - Index

Header File

ctype.h, wctype.h

Category

Classification Routines

Prototype

int isascii(int c);

int iswascii(wint_t c);

Description

Character classification macro.

These functions depend on the LC_CTYPE

isascii is a macro that classifies ASCII-coded integer values by table lookup. It is a predicate returning nonzero for true and 0 for false.

isascii is defined on all integer values.

Return Value

isascii returns nonzero if c is in the range 0 to 127 (0x00-0x7F).

iswascii returns nonzero if c is is a wide-character representation of an ASCII character.

Each of these routines returns 0 if c does not satisfy the test condition.

Example

 #include <stdio.h>
 #include <ctype.h>
 #include <stdio.h>
 int main(void)
 {
   char c = 'C';
   if (isascii(c))
     printf("%c is ascii\n",c);
   else
     printf("%c is not ascii\n",c);
   return 0;
 }

Portability

	POSIX	Win32	ANSI C	ANSI C++
isascii		+
iswascii		+