◐ Shell
clean mode source ↗

std::iswcntrl – cppreference.com

Aus cppreference.com

<metanoindex/>

<tbody> </tbody>

definiert in Header

<cwctype>

int iswcntrl( std::wint_t ch );

Prüft, ob ein breites Charakter ist ein Steuerzeichen, dh Codes 0x00-0x1F und 0x7F und alle Steuerzeichen spezifisch für den aktuellen locale .

Original:

Checks if the given wide character is a control character, i.e. codes 0x00-0x1F and 0x7F and any control characters specific to the current locale.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Parameter

ch -

Wide-Character

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.

Rückgabewert

Nicht-Null-Wert (true), wenn die Wide Zeichen ein Steuerzeichen ist, 0 (false) ansonsten .

Original:

Non-zero value (true) if the wide character is a control 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.

Beispiel

#include <iostream>
#include <cwctype>
#include <clocale>

int main()
{
    wchar_t c = L'\u2028'; // the Unicode character "line separator" 

    std::cout << std::hex << std::showbase << std::boolalpha;
    std::cout << "in the default locale, iswcntrl(" << (std::wint_t)c << ") = "
              << (bool)std::iswcntrl(c) << '\n';
    std::setlocale(LC_ALL, "en_US.utf8");
    std::cout << "in Unicode locale, iswcntrl(" << (std::wint_t)c << ") = "
              << (bool)std::iswcntrl(c) << '\n';
}

Output: 

in the default locale, iswcntrl(0x2028) = false
in Unicode locale, iswcntrl(0x2028) = true

Siehe auch

prüft, ob ein Zeichen als Steuerzeichen durch eine locale eingestuft

Original:

checks if a character is classified as a control character 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.


(Funktions-Template) [edit]

prüft, ob ein Zeichen ein Steuerzeichen ist

Original:

checks if a character is a control character

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.


(Funktion) [edit]

C documentation for iswcntrl

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