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std::iswxdigit cppreference.com
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std::iswxdigit

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C++
(C++20)
(C++20)
(C++11)
(C++20)
/
(C++11)
(C++11)
(C++11)
(C++17)
 
 
 
<tbody> </tbody>
int iswxdigit( wint_t ch );

, ( ) , .. 0123456789abcdefABCDEF.

ch wchar_t WEOF, .

ch

, , .

std::iswdigit std::iswxdigit , C. 

#include <cwctype>
#include <iostream>

int main()
{
    std::cout << std::boolalpha
              << (std::iswxdigit(L'a') != 0) << ' '
              << (std::iswxdigit(L'') != 0) << '\n';
}

: 

true false

,
( ) []
,
() []
C iswxdigit
ASCII

iscntrl
iswcntrl

isprint
iswprint

isspace
iswspace

isblank
iswblank

isgraph
iswgraph

ispunct
iswpunct

isalnum
iswalnum

isalpha
iswalpha

isupper
iswupper

islower
iswlower

isdigit
iswdigit

isxdigit
iswxdigit

- -- -
08 \x0\x8 \0\10 (NUL, ..) 0 0 0 0 0 0 0 0 0 0 0 0
9 \x9 \11 (\t) 0 0 0 0 0 0 0 0 0 0 0 0
1013 \xA\xD \12\15 (\n, \v, \f, \r) 0 0 0 0 0 0 0 0 0 0 0 0
1431 \xE\x1F \16\37 0 0 0 0 0 0 0 0 0 0 0 0
32 \x20 \40 0 0 0 0 0 0 0 0 0 0 0 0
3347 \x21\x2F \41\57 !"#$%&'()*+,-./ 0 0 0 0 0 0 0 0 0 0 0 0
4857 \x30\x39 \60\71 0123456789 0 0 0 0 0 0 0 0 0 0 0 0
5864 \x3A\x40 \72\100 :;<=>?@ 0 0 0 0 0 0 0 0 0 0 0 0
6570 \x41\x46 \101\106 ABCDEF 0 0 0 0 0 0 0 0 0 0 0 0
7190 \x47\x5A \107\132 GHIJKLMNOP
QRSTUVWXYZ 		0 0 0 0 0 0 0 0 0 0 0 0
9196 \x5B\x60 \133\140 [\]^_` 0 0 0 0 0 0 0 0 0 0 0 0
97102 \x61\x66 \141\146 abcdef 0 0 0 0 0 0 0 0 0 0 0 0
103122 \x67\x7A \147\172 ghijklmnop
qrstuvwxyz 		0 0 0 0 0 0 0 0 0 0 0 0
123126 \x7B\x7E \172\176 {|}~ 0 0 0 0 0 0 0 0 0 0 0 0
127 \x7F \177 (DEL) 0 0 0 0 0 0 0 0 0 0 0 0
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