Why are there no Russian letters?

Question

C++ / C#

Let's say we have C++ code:

#include <iostream>

using namespace std;

int main()
{
    // :)
    int a,b;
    cout << "Введи число A: \n";
    cin >> a;
    cout << "Введи число B: \n";
    cin >> b;
    cout << "Результат: " << a+b;
    return 0;
}

Why is this instead of
letters :

Answer 1

Well, like the first link in Google: https://code-live.ru/post/cpp-russian-locale-for-w...