◐ Shell
clean mode source ↗

std::iswdigit — cppreference.com

De cppreference.com

<metanoindex/>

<tbody> </tbody>

Déclaré dans l'en-tête

<cwctype>

int iswdigit( wint_t ch );

Vérifie si les données correspondent caractères larges (si réduit) à l'un des dix décimales caractères numériques 0123456789 .

Original:

Checks if the given wide character corresponds (if narrowed) to one of the ten decimal digit characters 0123456789.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Paramètres

ch -

caractère large

Original:

wide character

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Retourne la valeur

Valeur non nulle (true) si le caractère large est un caractère numérique, 0 (false) autrement .

Original:

Non-zero value (true) if the wide character is an numeric character, 0 (false) otherwise.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Notes

iswdigit et iswxdigit sont les seuls standards de larges fonctions de classification de personnalité ne sont pas affectés par les paramètres régionaux actuellement installé C .

Original:

iswdigit and iswxdigit are the only standard wide character classification functions that are not affected by the currently installed C locale.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Exemple

Certains endroits offrent des classes de personnages supplémentaires qui détectent les chiffres non-ASCII

Original:

Some locales offer additional character classes that detect non-ASCII digits

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <iostream>
#include <cwctype>
#include <clocale>
void test(wchar_t a3, wchar_t u3, wchar_t j3)
{
    std::wcout << std::boolalpha
               << "          '" << a3 << "'   '" << u3 << "'  '" << j3  << "'\n"
               << "iswdigit "
               << (bool)std::iswdigit(a3) << "  "
               << (bool)std::iswdigit(u3) << " "
               << (bool)std::iswdigit(j3) << '\n'
               << "jdigit:  "
               << (bool)std::iswctype(a3, std::wctype("jdigit")) << ' '
               << (bool)std::iswctype(u3, std::wctype("jdigit")) << ' '
               << (bool)std::iswctype(j3, std::wctype("jdigit")) << '\n';
}
int main()
{
    wchar_t a3 = L'3';  // the ASCII digit 3
    wchar_t u3 = L'三'; // the CJK numeral 3
    wchar_t j3 = L'３'; // the fullwidth digit 3

    std::setlocale(LC_ALL, "en_US.utf8");
    std::wcout << "In american locale:\n";
    test(a3, u3, j3);

    std::wcout << "\nIn japanese locale:\n";
    std::setlocale(LC_ALL, "ja_JP.utf8");
    test(a3, u3, j3);
}

Résultat : 

In american locale:
          '3'   '三'  '３'
iswdigit true  false false
jdigit:  false false false

In japanese locale:
          '3'   '三'  '３'
iswdigit true  false false
jdigit:  false false true

Voir aussi

vérifie si un caractère est considéré comme un chiffre par un paramètre régional

Original:

checks if a character is classified as a digit by a locale

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.


(fonction générique) [edit]

vérifie si un caractère est un chiffre

Original:

checks if a character is a digit

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.


(fonction) [edit]

C documentation for iswdigit

ASCII values
(hex) 		characters

iscntrl
iswcntrl

isprint
iswprint

isspace
iswspace

isblank
iswblank

isgraph
iswgraph

ispunct
iswpunct

isalnum
iswalnum

isalpha
iswalpha

isupper
iswupper

islower
iswlower

isdigit
iswdigit

isxdigit
iswxdigit

0 - 8 0x00-0x08 control codes (NUL, etc.) ≠0 0 0 0 0 0 0 0 0 0 0 0
9 0x09 tab (\t) ≠0 0 ≠0 ≠0 0 0 0 0 0 0 0 0
10 - 13 0x0A-0x0D whitespaces (\n,\v,\f,\r) ≠0 0 ≠0 0 0 0 0 0 0 0 0 0
14 - 31 0x0E-0x1F control codes ≠0 0 0 0 0 0 0 0 0 0 0 0
32 0x20 space 0 ≠0 ≠0 ≠0 0 0 0 0 0 0 0 0
33 - 47 0x21-0x2F !"#$%&'()*+,-./ 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
48 - 57 0x30-0x39 0123456789 0 ≠0 0 0 ≠0 0 ≠0 0 0 0 ≠0 ≠0
58 - 64 0x3a-0x40 :;<=>?@ 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
65 - 70 0x41-0x46 ABCDEF 0 ≠0 0 0 ≠0 0 ≠0 ≠0 ≠0 0 0 ≠0
71 - 90 0x47-0x5A GHIJKLMNOPQRSTUVWXYZ 0 ≠0 0 0 ≠0 0 ≠0 ≠0 ≠0 0 0 0
91 - 96 0x5B-0x60 [\]^_` 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
97 -102 0x61-0x66 abcdef 0 ≠0 0 0 ≠0 0 ≠0 ≠0 0 ≠0 0 ≠0
103-122 0x67-0x7A ghijklmnopqrstuvwxyz 0 ≠0 0 0 ≠0 0 ≠0 ≠0 0 ≠0 0 0
123-126 0x7B-0x7E {|}~ 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
127 0x7F backspace character (DEL) ≠0 0 0 0 0 0 0 0 0 0 0 0