std::towlower – cppreference.com

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definiert in Header `<cwctype>`

`std::wint_t towlower( std::wint_t ch );`

Konvertiert das angegebene wide character in Kleinbuchstaben, wenn möglich .

Original:

Converts the given wide character to lowercase, if possible.

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Parameter

breites Zeichen umgewandelt werden

Original:

wide character to be converted

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Rückgabewert

Kleinbuchstaben Version ch oder unmodifizierte ch wenn keine Kleinbuchstaben Version wird in der aktuellen C locale aufgeführt .

Original:

Lowercase version of ch or unmodified ch if no lowercase version is listed in the current C locale.

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Notes

Nur 1:1 Zeichenzuordnung kann durch diese Funktion durchgeführt werden, zB der griechische Großbuchstabe 'Σ' hat zwei Kleinbuchstaben Formen, abhängig von der Position in einem Wort: "σ" und "ς". Ein Aufruf std::towlower kann nicht verwendet werden, um die korrekte Kleinbuchstaben Form in diesem Fall zu erhalten .

Original:

Only 1:1 character mapping can be performed by this function, e.g. the Greek uppercase letter 'Σ' has two lowercase forms, depending on the position in a word: 'σ' and 'ς'. A call to std::towlower cannot be used to obtain the correct lowercase form in this case.

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Beispiel

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

int main()
{
    wchar_t c = L'\u0190'; // Latin capital open E ('Ɛ')

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

Output:

in the default locale, towlower(0x190) = 0x190
in Unicode locale, towlower(0x190) = 0x25b

Siehe auch


towupper	wandelt eine weite Zeichen in Großbuchstaben Original: converts a wide character to uppercase The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktion) [edit]

tolower(std::locale)	converts a character to lowercase using the ctype facet of a locale (Funktions-Template) [edit]

tolower	wandelt ein Zeichen in Kleinbuchstaben Original: converts a character to lowercase 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 towlower