int main()
  {

      StringNumConverter a;//не должно работать

      StringNumConverter b("-12063959085888582858005028580285808509859590");

      StringNumConverter c(1e -1);

        StringNumConverter d(1.2);

        if (d != StringNumConverter ((float) c +1.1)) cout << "Something wrong\n";

        else cout << "As expected\n";

        cout << b+"9" << endl << c+"1" << endl;


        return 0;

 }