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std::iscntrl

De cppreference.com
< cpp‎ | string‎ | byte

 
 
Strings biblioteca
Terminadas en nulo
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Null-terminated strings
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Classes
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basic_string
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Functions
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De manipulación de caracteres
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Character manipulation
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Las conversiones a formatos numéricos
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Conversions to numeric formats
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String manipulation
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String examination
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Memory manipulation
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Miscellaneous
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Defined in header <cctype>
int iscntrl( int ch );
Comprueba si el carácter dado se clasifica como un carácter de control por el locale C instalado actualmente. En la localidad por defecto C, los caracteres de control son los personajes con los códigos y 0x00-0x1F 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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Contenido

[editar] Parámetros

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

Valor distinto de cero (true) si el carácter es un carácter de control, 0 (false) de otra manera .
Original:
Non-zero value (true) if the character is a control character, 0 (false) otherwise.
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[editar] Ejemplo

#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] Ver también

Comprueba si un carácter está clasificado como un carácter de control por una configuración regional
Original:
checks if a character is classified as a control character by a locale
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(función de plantilla) [edit]
comprueba si un carácter ancho es un carácter de control
Original:
checks if a wide character is a control character
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(función) [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