c#窗体程序编写计算器()程序代码怎么编写

Question

如题所述

Answer 1

        bool ClearFlag = false;
        double M = 0;
        /// <summary>
        /// 0-9，+，-，*，/，求余%
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonInput_Click(object sender, EventArgs e)
        {
            Button btn = sender as Button;
            string input = tb_Result.Text.Replace("\r\n0", "");
            string curBtn = btn.Text;
            if (ClearFlag)
            { input = ""; ClearFlag = false; }
            if (input == "" && curBtn == "0")
                return;
            if (btn.Text == "+" || btn.Text == "-" || btn.Text == "*" || btn.Text == "/" || btn.Text == "%")
            {
                if (input == "")
                    input = "0";
                if (input.Contains("+") || input.Contains("-") || input.Contains("*") || input.Contains("/") || input.Contains("%"))
                {
                    input = Calculate(input);
                }
                tb_Result.Text = input + " " + btn.Text + " " + "\r\n";
                return;
            }
            else tb_Result.Text = input + btn.Text;
        }

        string Calculate(string formula)
        {
            ClearFlag = true;
            formula = formula.Replace("\r\n", "");
            string result = "";
            double d_result;
            string s_txt = formula;
            int space = s_txt.IndexOf(' ');
            if (space == -1) return formula;

            string s1 = s_txt.Substring(0, space);
            char operation = Convert.ToChar(s_txt.Substring((space + 1), 1));

            string s2 = s_txt.Substring(space + 3);
            double arg1 = Convert.ToDouble(s1);
            if (operation == '√' || operation == 'x' )
                s2 = "0";
                if (s2 == "") return "\r\n0";
            double arg2 = Convert.ToDouble(s2);
            switch (operation)
            {
                case '+':
                    d_result = arg1 + arg2;
                    break;
                case '-':
                    d_result = arg1 - arg2;
                    break;
                case '*':
                    d_result = arg1 * arg2;
                    break;
                case '/':
                    if (arg2 == 0)
                    {
                        throw new ApplicationException();
                    }
                    else
                    {
                        d_result = arg1 / arg2;
                    }
                    break;
                case '√': d_result = Math.Pow(arg1, 0.5);
                    break;
                case 'x': d_result = Math.Pow(arg1, 2);
                    break;
                case '%': d_result = arg1 % arg2;
                    break;
                default:
                    throw new ApplicationException();
            }
            result = d_result.ToString();
            return result;
        }
        /// <summary>
        /// CE，C
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonClear_Click(object sender, EventArgs e)
        {
            tb_Result.Text = "\r\n0";
        }
        /// <summary>
        /// =
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonEqual_Click(object sender, EventArgs e)
        {
            string input = tb_Result.Text.Replace("\r\n0", "");
            tb_Result.Text = "\r\n" + Calculate(input);
        }
        /// <summary>
        /// 后退
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonBackSpace_Click(object sender, EventArgs e)
        {
            int length = tb_Result.Text.Length;
            if (length > 0)
                tb_Result.Text = tb_Result.Text.Substring(0, length - 1);
        }
        /// <summary>
        /// 根号，平方
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonOperation_Click(object sender, EventArgs e)
        {
            Button btn = sender as Button;
            string input = tb_Result.Text.Replace("\r\n0", "");
            string curBtn = btn.Text;
            input = input + " " + btn.Text + " " + "\r\n";
            tb_Result.Text = "\r\n" + Calculate(input);
        }

        private void buttonMs_Click(object sender, EventArgs e)
        {
            Button btn = sender as Button;
            string input = tb_Result.Text.Replace("\r\n0", "");
            string curBtn = btn.Text.Replace("M","");
            char operation = Convert.ToChar(curBtn.Substring(0, 1));
            double arg =0, d_result=0;
            try
            {
                arg = Convert.ToDouble(input);
            }
            catch { return; }
            switch (operation)
            {
                case '+':
                    d_result = M + arg;
                    break;
                case '-':
                    d_result = M - arg;
                    break;
                case 'S':
                    M = arg;
                    return;
                case 'R':
                    d_result = M;
                    break;
                case 'C':
                    M =0;
                    return;
                default:
                    return;
            }
            tb_Result.Text = "\r\n" + d_result;
        }

Answer 2

50块帮写。