#include <iostream>
#include <string>

int main()
{
    std::string d1 = "сайн";
    std::string d2 = "\xd1\x81\xd0\xb0\xd0\xb9\xd0\xbd";
    if(d1 == d2)
        std::cout << "Your development environment uses UTF-8\n";
    else
       std::cout << "Your development environment uses something else\n";
}