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std::wmemset(3) C++ Standard Libary std::wmemset(3) NAME std::wmemset - std::wmemset Synopsis Defined in header <cwchar> wchar_t* wmemset( wchar_t* dest, wchar_t ch, std::size_t count ); Copies the wide character ch into each of the first count wide char- acters of the wide character array pointed to by dest. If overflow occurs, the behavior is undefined. If count is zero, the function does nothing. Parameters dest - pointer to the wide character array to fill ch - fill wide character count - number of wide characters to fill Return value Returns a copy of dest Notes This function is not locale-sensitive and pays no attention to the values of the wchar_t objects it writes: nulls as well as invalid wide characters are written too. Example // Run this code #include <iostream> #include <cwchar> #include <clocale> #include <locale> int main() { wchar_t ar[4] = {L'1', L'2', L'3', L'4'}; std::wmemset(ar, L'\U0001f34c', 2); // replaces [12] with the ba- nanas std::wmemset(ar+2, L'', 2); // replaces [34] with the bananas std::setlocale(LC_ALL, "en_US.utf8"); std::wcout.imbue(std::locale("en_US.utf8")); std::wcout << std::wstring(ar, 4) << '\n'; } Possible output: See also memset fills a buffer with a character (function) copies a certain amount of wide characters between two non- overlapping wmemcpy arrays (function) fill_n copy-assigns the given value to N elements in a range (function template) http://cppreference.com 2022.07.31 std::wmemset(3)
NAME | Synopsis | Parameters | Return value | Notes | Example | Possible output: | See also
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