std::iswdigit

 

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Null-terminierte Strings Original: Null-terminated strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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

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Nullterminierten Wide Strings

Funktionen Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Character Manipulation Original: Character manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
iswalnum iswalpha iswlower iswupper iswdigit iswxdigit iswblank (C++11) wctype iswctype	iswcntrl iswgraph iswspace iswprint iswpunct towlower towupper wctrans towctrans
Umwandlungen in numerische Formate Original: Conversions to numeric formats The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
wcstol wcstoll wcstoul wcstoull	wcstof wcstod wcstold
String-Manipulation Original: String manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
wcslen wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp	wcsxfrm wcschr wcsrchr wcspbrk wcsspn wcscspn wcsstr wcstok
Array-Manipulation Original: Array manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
wmemcpy
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definiert in Header <cwctype>
int iswdigit( wint_t ch );

Prüft, ob die gegebenen-Zeichen entspricht (wenn verengt) zu einem der zehn Dezimalziffer Zeichen 0123456789 .

Original:

Checks if the given wide character corresponds (if narrowed) to one of the ten decimal digit characters 0123456789.

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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 breite Zeichen ein numerisches Zeichen ist, 0 (false) ansonsten .

Original:

Non-zero value (true) if the wide character is an numeric character, 0 (false) otherwise.

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Notes

iswdigit und iswxdigit sind die einzigen Standard-Zeichen Klassifizierung Funktionen, die nicht von der aktuell installierten C locale betroffen sind .

Original:

iswdigit and iswxdigit are the only standard wide character classification functions that are not affected by the currently installed C locale.

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Beispiel

Einige Schauplätze bieten zusätzliche Charakter-Klassen, die Nicht-ASCII-Zeichen zu erkennen

Original:

Some locales offer additional character classes that detect non-ASCII digits

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#include <iostream>#include <cwctype>#include <clocale>void test(wchar_t a3, wchar_t u3, wchar_t j3){std::wcout<<std::boolalpha<<" '"<< a3 <<"' '"<< u3 <<"' '"<< j3 <<"'\n"<<"iswdigit "<<(bool)std::iswdigit(a3)<<" "<<(bool)std::iswdigit(u3)<<" "<<(bool)std::iswdigit(j3)<<'\n'<<"jdigit: "<<(bool)std::iswctype(a3, std::wctype("jdigit"))<<' '<<(bool)std::iswctype(u3, std::wctype("jdigit"))<<' '<<(bool)std::iswctype(j3, std::wctype("jdigit"))<<'\n';}int main(){wchar_t a3 = L'3';// the ASCII digit 3wchar_t u3 = L'三';// the CJK numeral 3wchar_t j3 = L'３';// the fullwidth digit 3   std::setlocale(LC_ALL, "en_US.utf8");std::wcout<<"In american locale:\n"; test(a3, u3, j3);   std::wcout<<"\nIn japanese locale:\n";std::setlocale(LC_ALL, "ja_JP.utf8"); test(a3, u3, j3);}

Output:

In american locale: '3' '三' '３' iswdigit true false false jdigit: false false false   In japanese locale: '3' '三' '３' iswdigit true false false jdigit: false false true

Siehe auch

isdigit(std::locale)	prüft, ob ein Zeichen als einer Ziffer von einem locale eingestuft Original: checks if a character is classified as a digit 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)
isdigit	prüft, ob ein Zeichen eine Ziffer ist Original: checks if a character is a digit The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktion)
C documentation for iswdigit

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