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std::iscntrl

Da cppreference.com
< cpp‎ | string‎ | byte

 
 
Biblioteca cordas
Strings terminadas
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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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basic_string
char_traits
 
Cordas de terminação nula de bytes
Funções
Original:
Functions
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Manipulação personagem
Original:
Character manipulation
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Conversões para formatos numéricos
Original:
Conversions to numeric formats
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Manipulação de cadeia
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
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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memchr
memcmp
memset
memcpy
memmove
Diversos
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Miscellaneous
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strerror
 
Defined in header <cctype>
int iscntrl( int ch );
Verifica se o caráter dado é classificado como um caractere de controle pela localidade C instalado atualmente. No local padrão C, os caracteres de controle são os personagens com os códigos de 0x00-0x1F e 0x7F.
Original:
Checks if the given character is classified as a control character by the currently installed C locale. In the default C locale, the control characters are the characters with the codes 0x00-0x1F and 0x7F.
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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 de controle, 0 (false) de outra forma.
Original:
Non-zero value (true) if the character is a control character, 0 (false) otherwise.
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[editar] Exemplo

#include <iostream>
#include <cctype>
#include <clocale>
 
int main()
{
    char c = '\x94'; // the control code CCH in ISO-8859-1
 
    std::cout << "iscntrl(\'\\x94\', default C locale) returned "
               << std::boolalpha << (bool)std::iscntrl(c) << '\n';
 
    std::setlocale(LC_ALL, "en_GB.iso88591");
    std::cout << "iscntrl(\'\\x94\', ISO-8859-1 locale) returned "
              << std::boolalpha << (bool)std::iscntrl(c) << '\n';
 
}

Output:

iscntrl('\x94', default C locale) returned false
iscntrl('\x94', ISO-8859-1 locale) returned true

[editar] Veja também

checa se o personagem é classificado como um caractere de controle de uma localidade
Original:
checks if a character is classified as a control character by a locale
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(modelo de função) [edit]
checa se o personagem de largura é um caractere de controle
Original:
checks if a wide character is a control character
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(função) [edit]
C documentation for iscntrl
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