Question

我正在制作一个简单的计算器。到目前为止，我已成功地在计算器中实现了一些基本功能。看看代码

public double num1 { get; set; }
        public double num2 { get; set; }
        public string op { get; set; }
       // public bool checker { get; set; }

        private void ButtonBase_OnClick1(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button1.Content.ToString();
            ShowTextBlock.Text += Button1.Content.ToString();
        }

        private void ButtonBase_OnClick2(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button2.Content.ToString();
            ShowTextBlock.Text += Button2.Content.ToString();
        }

        private void ButtonBase_OnClick3(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button3.Content.ToString();
            ShowTextBlock.Text += Button3.Content.ToString();
        }

        private void ButtonBase_OnClick4(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button4.Content.ToString();
            ShowTextBlock.Text += Button4.Content.ToString();
        }

        private void ButtonBase_OnClick5(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button5.Content.ToString();
            ShowTextBlock.Text += Button5.Content.ToString();
        }

        private void ButtonBase_OnClick6(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button6.Content.ToString();
            ShowTextBlock.Text += Button6.Content.ToString();
        }

        private void ButtonBase_OnClick7(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button7.Content.ToString();
            ShowTextBlock.Text += Button7.Content.ToString();
        }

        private void ButtonBase_OnClick8(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button8.Content.ToString();
            ShowTextBlock.Text += Button8.Content.ToString();
        }

        private void ButtonBase_OnClick9(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button9.Content.ToString();
            ShowTextBlock.Text += Button9.Content.ToString();
        }

        private void ButtonBase_OnClick0(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Button0.Content.ToString();
            ShowTextBlock.Text += Button0.Content.ToString();
        }

        private void ButtonBase_OnClickdot(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Buttondot.Content.ToString();
            ShowTextBlock.Text += Buttondot.Content.ToString();
        }

        private void ButtonBase_OnClickobrac(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Buttonobrac.Content;
            ShowTextBlock.Text += Buttonobrac.Content.ToString();
        }

        private void ButtonBase_OnClickcbrac(object sender, RoutedEventArgs e)
        {
            CalculateTextBlock.Text += Buttoncbrac.Content;
            ShowTextBlock.Text += Buttoncbrac.Content.ToString();
        }



        //private void ButtonBase_OnClickinf(object sender, RoutedEventArgs e)
        //{
        //    CalculateTextBlock.Text += ("0/0").ToString();
        //    ShowTextBlock.Text += "Inf.";
        //}

        private void ButtonBase_OnClickplus(object sender, RoutedEventArgs e)
        {
            //num1 += double.Parse(CalculateTextBlock.Text);
            num1 = Convert.ToDouble(CalculateTextBlock.Text);
            op = "plus";
            CalculateTextBlock.Text = "";
            ShowTextBlock.Text += "+";
        }

        private void ButtonBase_OnClickminus(object sender, RoutedEventArgs e)
        {
            num1 += double.Parse(CalculateTextBlock.Text);
            op = "sub";
            CalculateTextBlock.Text = "";
            ShowTextBlock.Text += "-";
        }

        private void ButtonBase_OnClickmul(object sender, RoutedEventArgs e)
        {
            num1 +=  double.Parse(CalculateTextBlock.Text);
            op = "mul";
            CalculateTextBlock.Text = "";
            ShowTextBlock.Text += "*";
        }

        private void ButtonBase_OnClickdiv(object sender, RoutedEventArgs e)
        {
            num1 += double.Parse(CalculateTextBlock.Text);
            op = "div";
            CalculateTextBlock.Text = "";
            ShowTextBlock.Text += "/";
        }

        private void ButtonBase_OnClickequal(object sender, RoutedEventArgs e)
        {
            switch (op)
            {
                case "plus" :
                    //num2 = num1 + double.Parse(CalculateTextBlock.Text);
                    num2 = num1 + Convert.ToDouble(CalculateTextBlock.Text);
                    break;

                case "sub":
                    num2 = num1 - double.Parse(CalculateTextBlock.Text);
                    break;

                case "mul":
                    num2 = num1*double.Parse(CalculateTextBlock.Text);
                    break;

                case "div":
                    num2 = num1/double.Parse(CalculateTextBlock.Text);
                    break;
            }
            CalculateTextBlock.Text = num2.ToString();
            num1 = 0;
            ShowTextBlock.Text = "";

        }

        private void ButtonBase_OnClickclear(object sender, RoutedEventArgs e)
        {
            num1 = 0;
            num2 = 0;
            ShowTextBlock.Text = "";
            CalculateTextBlock.Text = "";
        }

当我将括号插入calculatetextbox时会出现问题。它在解析时抛出FormatException。我有什么方法可以在这里实施BIDMAS吗？

注意：我已尝试解析和转换方法{int.parse和convert}

感谢任何帮助。感谢

Answer 1

如果需要实现BIDMAS规则和括号，则应首先解析输入并为每个表达式生成标记。获得每个令牌后，按照规则进行计算。

除此之外，这个问题在这里得到解答：dynamic expression evaluation

关于堆栈溢出的另一篇文章也引用了这个

stackoverflow post to answer the same question

Answer 2

似乎只是缺少.ToString（）转换你的Bottonobrac.Content，你在Buttondot.Content中有它。

private void ButtonBase_OnClickdot(object sender, RoutedEventArgs e)
    {
        CalculateTextBlock.Text += Buttondot.Content.ToString(); //You have it here
        ShowTextBlock.Text += Buttondot.Content.ToString();
    }

    private void ButtonBase_OnClickobrac(object sender, RoutedEventArgs e)
    {
        CalculateTextBlock.Text += Buttonobrac.Content; //Add .ToString() 
        ShowTextBlock.Text += Buttonobrac.Content.ToString();
    }

这应该可以解决您的问题。同时，您始终可以使用compile and execute c# online来测试代码中缺少的内容。

Answer 3

试试这个： -

<script type="text/javascript">
        function Calculate() {

            var expression = document.getElementById('<%=this.TextBox1.ClientID%>').value;
            var result = eval(expression);
            var hidden = document.getElementById('<%=this.hdfResult.ClientID%>');
            hidden.value = result;

        }
    </script>

并在按钮单击事件上写下此OnClientClick="Calculate();，即调用脚本。有关详细信息，请查看此Link

或

试试这个

<form id="Calc" runat="server"> <div> <table border= "4"> <tr> <td> <input type="text" name="Input" size="16" \> <br /> </td> </tr> <tr> <td> <input type="button" name="one" value=" 1 " onclick ="Calc.Input.value += '1'" \> <input type="button" name="two" value=" 2 " onclick="Calc.Input.value += '2'" \> <input type="button" name="three" value=" 3 " onclick="Calc.Input.value += '3'" \> <input type="button" name="plus" value=" + " onclick="Calc.Input.value += ' + '" \> <br /> <input type="button" name="four" value=" 4 " onclick="Calc.Input.value += '4'" \> <input type="button" name="five" value=" 5 " onclick="Calc.Input.value += '5'" \> <input type="button" name="six" value=" 6 " onclick="Calc.Input.value += '6'" \> <input type="button" name="minus" value=" - " onclick="Calc.Input.value += ' - '" \> <br /> <input type="button" name="seven" value=" 7 " onclick="Calc.Input.value += '7'" \> <input type="button" name="eight" value=" 8 " onclick="Calc.Input.value += '8'" \> <input type="button" name="nine" value=" 9 " onclick="Calc.Input.value += '9'" \> <input type="button" name="times" value=" x " onclick="Calc.Input.value += ' * '" \> <br /> <input type="button" name="clear" value=" c " onclick="Calc.Input.value = ''" \> <input type="button" name="zero" value=" 0 " onclick="Calc.Input.value += '0'" \> <input type="button" name="DoIt" value=" = " onclick="Calc.Input.value = eval(Calc.Input.value)" \> <input type="button" name="div" value=" / " onclick="Calc.Input.value += ' / '" \> <br /> </td> </tr> </table> </div> </form>

Answer 4

@Prajjwal我还在Microsoft Visual Studio Express 2013 for Web上制作了一个简单的计算器。这是我的代码。看一看！希望它有所帮助：

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void addButton_Click(object sender, EventArgs e)
    {
        double firstValue = double.Parse(firstTextBox.Text);
        double secondValue = double.Parse(secondTextBox.Text);
        double addValue = firstValue + secondValue;
        resultLabel.Text = addValue.ToString();
    }

    protected void subtractButton_Click(object sender, EventArgs e)
    {
        double firstValue = double.Parse(firstTextBox.Text);
        double secondValue = double.Parse(secondTextBox.Text);
        double addValue = firstValue - secondValue;
        resultLabel.Text = addValue.ToString();
    }

    protected void multiplicationButton_Click(object sender, EventArgs e)
    {
        double firstValue = double.Parse(firstTextBox.Text);
        double secondValue = double.Parse(secondTextBox.Text);
        double addValue = firstValue * secondValue;
        resultLabel.Text = addValue.ToString();
    }

    protected void divideButton_Click(object sender, EventArgs e)
    {
        double firstValue = double.Parse(firstTextBox.Text);
        double secondValue = double.Parse(secondTextBox.Text);
        double addValue = firstValue / secondValue;
        resultLabel.Text = addValue.ToString();
    }
}

在C＃中使用计算器中使用方括号（）

4 个答案: