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std::isdigit

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< cpp‎ | string‎ | byte

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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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Cordas de terminação nula de bytes
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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Exame String
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String examination
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Manipulação de memória
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Memory manipulation
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Diversos
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Miscellaneous
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Definido no cabeçalho <cctype>
int isdigit( int ch );
Verifica se o caráter dado é um dos 10 dígitos decimais: 0123456789.
Original:
Checks if the given character is one of the 10 decimal digits: 0123456789.
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Índice

[editar] Parâmetros

ch -
personagem
Original:
character
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[editar] Valor de retorno

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

isdigit e isxdigit são as únicas funções padrão de caracteres estreitas de classificação que não são afetados pela localidade C instalado atualmente. apesar de algumas implementações (por exemplo, Microsoft em 1252 codepage) podem classificar adicionais caracteres de byte único como dígitos.
Original:
isdigit and isxdigit are the only standard narrow character classification functions that are not affected by the currently installed C locale. although some implementations (e.g. Microsoft in 1252 codepage) may classify additional single-byte characters as digits.
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[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 largo é um dígito
Original:
checks if a wide character is a digit
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(função) [edit]
Documentação C para isdigit
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
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