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std::wctob – cppreference.com

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definiert in Header `<cwchar>`

`int wctob( std::wint_t c );`

Narrows eine breite Charakter c wenn seine Multibyte-Zeichen entspricht in der ersten Schaltzustand ist ein Single-Byte .

Original:

Narrows a wide character c if its multibyte character equivalent in the initial shift state is a single byte.

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Dieser ist in der Regel für die Zeichen aus dem ASCII-Zeichensatz möglich, da die meisten Multibyte-Kodierungen (wie UTF-8) verwenden einzelnen Bytes, um diese Zeichen zu kodieren .

Original:

This is typically possible for the characters from the ASCII character set, since most multibyte encodings (such as UTF-8) use single bytes to encode those characters.

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Parameter

c

-

Breitzeichen einzuengen

Original:

wide character to narrow

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Rückgabewert

EOF wenn c stellen keine Multibyte-Zeichen mit einer Länge 1 in ersten Schaltzustand .

Original:

EOF if c does not represent a multibyte character with length 1 in initial shift state.

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Andernfalls wird die Single-Byte-Darstellung c als unsigned char um int

Original:

Otherwise, the single-byte representation of c as unsigned char converted to int

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Beispiel

#include <cwchar>
#include <cstdio>
#include <clocale>

int main()
{
    std::setlocale(LC_ALL, "");
    std::printf("narrow: %c\nnarrowed from wide: %c\n", 'a', std::wctob(L'a'));
}

Output:

narrow: a
narrowed from wide: a

Siehe auch


btowc	weitet sich ein Single-Byte engen Charakter-Zeichen, wenn möglich Original: widens a single-byte narrow character to wide character, if possible The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktion) [edit]

do_narrow [virtuell]	wandelt ein Zeichen oder Zeichen aus `charT` um `char` Original: converts a character or characters from `charT` to `char` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (virtuellen geschützten Member-Funktion of `std::ctype`) [edit]

C documentation for wctob