std::iswdigit
De cppreference.com
 [] |
This page has been machine-translated from the English version of the wiki using Google Translate.
The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here. |
![[]](https://upload.cppreference.com/mwiki/images/3/31/Imbox_notice.png){kind=link}
<metanoindex/>
<tbody> </tbody>| Dclar dans l'en-tte <cwctype>
|
||
int iswdigit( wint_t ch ); |
||
Vrifie si les donnes correspondent caractres larges (si rduit) l'un des dix dcimales caractres numriques
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.
You can help to correct and verify the translation. Click here for instructions.
Paramtres
| ch | - | caractre 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 caractre large est un caractre numrique, 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.
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 personnalit ne sont pas affects par les paramtres rgionaux actuellement install 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.
You can help to correct and verify the translation. Click here for instructions.
Exemple
Certains endroits offrent des classes de personnages supplmentaires qui dtectent 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.
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''; // the CJK numeral 3
wchar_t j3 = L''; // 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);
}
Rsultat :
In american locale:
'3' '' ''
iswdigit true false false
jdigit: false false false
In japanese locale:
'3' '' ''
iswdigit true false false
jdigit: false false true
Voir aussi
vrifie si un caractre est considr comme un chiffre par un paramtre rgional 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 gnrique) | |
vrifie si un caractre 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) | |
C documentation for iswdigit
| |
| ASCII values (hex) |
characters | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
|