Name

The iswalnum() function tests whether ’wch’ is a wide alphabet or wide digit i.e. it belongs to class alnum(see defns for definition).

The result of this function is undefined unless the argument is WEOF or a valid wchar_t value.

The functionality of this API is independent of the program’s current locale and so it returns non-zero for all the characters (of various locales supported) that belong to the class alnum, irrespective of the locale they belong to.

#include<wctype.h> //iswalnum()
#include<stdio.h>  //printf()
void test_iswalnum()
{
   int arr[]={’8’,0xe1,’5’,’Z’,0xfd,0xFF12,0xFF19,0xFF71,0x03A3};
   int i = 0;
   int size = 9;
   for( i=0; i<size; i++)
   {
     int ret = iswalnum(arr[i]); //call to the API with chars in the arr[]
     if( (!ret) != 0 )
     {
        printf("\n%lc is not wide alnum", arr[i]);
     }
     else
     {
        printf("\n%lc is a wide alnum ", arr[i]);
     }
   }
printf("\n");
}

Output

8 is wide alnum
«¡ is wide alnum
5 is wide alnum
Z is wide alnum
«ò is wide alnum
£² is wide alnum
£¹ is wide alnum
± is wide alnum
¦² is wide alnum

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