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std::iswalnum

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< cpp‎ | string‎ | wide

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C++
 
Strings Bibliothek
Null-terminierte Strings
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Null-terminated strings
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Byte-Strings
Multibyte-Strings
Wide Strings
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Classes
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basic_string
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Nullterminierten Wide Strings
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Functions
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Character manipulation
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Umwandlungen in numerische Formate
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Conversions to numeric formats
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wmemcpy
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definiert in Header <cwctype>
int iswalnum( std::wint_t ch );
Prüft, ob die angegebene wide character ist ein alphanumerisches Zeichen, dh entweder eine Zahl (0123456789), ein Großbuchstabe (ABCDEFGHIJKLMNOPQRSTUVWXYZ), ein Kleinbuchstabe (abcdefghijklmnopqrstuvwxyz) oder alphanumerischen Zeichen spezifisch für den aktuellen locale .
Original:
Checks if the given wide character is an alphanumeric character, i.e. either a number (0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz) or any alphanumeric character specific to the current locale.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

ch -
Wide-Character
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wide character
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[Bearbeiten] Rückgabewert

Nicht-Null-Wert (true), wenn die Wide Zeichen ein alphanumerisches Zeichen ist, 0 (false) ansonsten .
Original:
Non-zero value (true) if the wide character is a alphanumeric character, 0 (false) otherwise.
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[Bearbeiten] Beispiel

#include <iostream>
#include <cwctype>
#include <clocale>
 
int main()
{
    wchar_t c = L'\u13ad'; // the Cherokee letter HA ('Ꭽ')
 
    std::cout << std::hex << std::showbase << std::boolalpha;
    std::cout << "in the default locale, iswalnum(" << (std::wint_t)c << ") = "
              << (bool)std::iswalnum(c) << '\n';
    std::setlocale(LC_ALL, "en_US.utf8");
    std::cout << "in Unicode locale, iswalnum(" << (std::wint_t)c << ") = "
              << (bool)std::iswalnum(c) << '\n';
}

Output: 

in the default locale, iswalnum(0x13ad) = false
in Unicode locale, iswalnum(0x13ad) = true

[Bearbeiten] Siehe auch
prüft, ob ein Zeichen als alphanumerische durch eine locale eingestuft
Original:
checks if a character is classified as alphanumeric by a locale
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(Funktions-Template) [edit]
prüft, ob ein Zeichen ist alphanumerisch
Original:
checks if a character is alphanumeric
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(Funktion) [edit]
C documentation for iswalnum
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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