Cyrillic in c++, how to work with wstring?

Question

C++ / C#

How to work with Russian letters in c++? output is empty. Is there a way to overwrite the L"" string?

#include <iostream>
#include <string>
using namespace std;

int main()
{
    wstring myStr;
    getline(wcin , myStr); 
    wcout << myStr[0] << endl; 
    return 0;
}

Answer 1

locale::global(locale(".866", locale::all));
It should work on VS19+Win10, where it almost certainly doesn't.