static void Main()
    {
        Num ob = new Num();
        int lcf, gcf;

        if (ob.HasComFactor(231, 105, out lcf, out gcf))
        {
            Console.WriteLine("Lcf of 231 and 105 is " + lcf);
            Console.WriteLine("Gcf of 231 and 105 is " + gcf);
        }
        else
        {
            Console.WriteLine("No common factor for 35 and 49.");
        }

        if (ob.HasComFactor(35, 51, out lcf, out gcf))
        {
            Console.WriteLine("Lcf of 35 and 51 " + lcf);
            Console.WriteLine("Gcf of 35 and 51 is " + gcf);
        }
        else
        {
            Console.WriteLine("No common factor for 35 and 51.");
        }
    }