use Inline "C";

print is_alpha("foo");
__END__
__C__
int is_alpha( char * str ) 
{
    while ( *str != '\0' ) {
        if ( ((*str >= 97) && (*str <=122)) || ((*str >= 65) && (*str <=90)) )
            return 1;
        str++;
    }
    return 0;
}