std::wcstombs

`<cstdlib>`
`std::size_t wcstombs( char* dst, const wchar_t* src, std::size_t len);`

, src, , . , dst. len .

, std::wctomb, , wctomb . , :

.
wchar_t, C.
len.

std::mbstate_t , std::wcsrtombs .

POSIX : dst , , dst . std::wcsrtombs.

dst		,
src
len		, , dst

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( ) static_cast<std::size_t>(-1).

#include <iostream>
#include <clocale>
#include <cstdlib>

int main()
{
    std::setlocale(LC_ALL, "en_US.utf8");
    //    UTF-8
    const wchar_t* wstr = L"z\u00df\u6c34\U0001d10b"; //  L"z"
    char mbstr[11];
    std::wcstombs(mbstr, wstr, 11);
    std::cout << " : " << mbstr << '\n';
}

:

: z

wcsrtombs	() []
mbstowcs	() []
do_out [virtual]	internT externT, , : converts a string from internT to externT, such as when writing to file Google. . . (virtual protected `std::codecvt` -) []
C wcstombs







(C++20)

(C++20)
(C++11)





(C++20)


/

(C++11)
(C++11)
(C++11)
(C++17)

cppreference.com

std::wcstombs