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std::iswdigit

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< cpp‎ | string‎ | wide

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C++
 
Biblioteca cordas
Strings terminadas
Original:
Null-terminated strings
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Cadeias de bytes
Multibyte cordas
Cordas de largura
Classes
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Classes
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Strings terminadas largura
Funções
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Functions
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Manipulação personagem
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Character manipulation
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Conversões para formatos numéricos
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Conversions to numeric formats
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Manipulação de cadeia
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String manipulation
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Manipulação matriz
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Array manipulation
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Definido no cabeçalho <cwctype>
int iswdigit( wint_t ch );
Verifica se os dados de largura corresponde caracteres (se estreitaram) para uma das dez dígitos decimais caracteres 0123456789.
Original:
Checks if the given wide character corresponds (if narrowed) to one of the ten decimal digit characters 0123456789.
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Índice

[editar] Parâmetros

ch -
caráter de largura
Original:
wide character
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[editar] Valor de retorno

Valor diferente de zero (true) se o personagem de largura é um caractere numérico, 0 (false) de outra forma.
Original:
Non-zero value (true) if the wide character is an numeric character, 0 (false) otherwise.
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[editar] Notas

iswdigit e iswxdigit são as únicas funções padrão de caracteres de largura de classificação que não são afetados pela localidade C atualmente instalado.
Original:
iswdigit and iswxdigit are the only standard wide character classification functions that are not affected by the currently installed C locale.
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[editar] Exemplo

Alguns locais oferecem aulas de caracteres adicionais que detectam não-ASCII dígitos
Original:
Some locales offer additional character classes that detect non-ASCII digits
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#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);
}

Saída: 

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

[editar] Veja também
checa se o caractere é classificado como um dígito pela localidade
Original:
checks if a character is classified as a digit by a locale
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(modelo de função) [edit]
verifica se um caractere é um dígito
Original:
checks if a character is a digit
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(função) [edit]
Documentação C para 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
Obtida de "https://pt.cppreference.com/mwiki/index.php?title=cpp/string/wide/iswdigit&oldid=21788"