static void Main(string[] args)
    {
        Params p;

        p = new Params();

        int x = 0, y = 0;

        p.math1(100, 50, ref x, ref y);
        Console.WriteLine(x + " " + y);
        int m, n;

        p.math2(100, 25, out m, out n);
        Console.WriteLine(m + " " + n);

        p.AddNum(100);
        p.AddNum(100, 100);
        p.AddNum(100, z: 100);
        p.AddNum(200, 200, 300);
        Console.ReadLine();
    }