private void calc(int nm1, int nm2, string type)
        {
            int Output;
            switch (type)
            {
                case "+":
                    Output = nm1 + nm2;
                    break;
                case "-":
                    Output = nm1 - nm2;
                    break;
                case "*":
                    Output = nm1 * nm2;
                    break;
                case "/":
                    Output = nm1 / nm2;
                    break;
                case "2":
                    int nm1output = nm1;
                    int ggr;
                    for (ggr = nm2; ggr > 0; ggr--)
                    {
                        nm1output = nm1output * nm1;
                    }
                    break;


            }

        }