c# windows窗体应用程序中怎么用switch写一个计算器的程序

先看看图片

说明以上控件动态生成的,初学可自己拖放控件,以下代码仅供参考

/*设计一个简单的四则计算器*/

            string[] 名称 = { "+", "-", "*", "/" }

            Button[] 控件组 = Array.ConvertAll(名称, 控件 =>new Button())

            EventHandler[] 按钮事件 = new EventHandler[] { 按钮加_Click, 按钮减_Click, 按钮乘_Click, 按钮除_Click }

            foreach (Button 按钮 in 控件组)

            {

                按钮.Text = 名称[--数]

                按钮.Name = "按钮" + 数.ToString()

                按钮.Parent = this

                按钮.Anchor = (AnchorStyles.Top | AnchorStyles.Left)

                按钮.Location = new Point(100 * 数, 17)

                按钮.Click += 按钮事件[数]

            }

            名称 = new string[] { "值1", "值2", "结果" }

            TextBox[] 数字输入框 = Array.ConvertAll(名称, 控件 =>new TextBox())

            数 = 3

            foreach (TextBox 输入框 in 数字输入框)

            {

                输入框.Text = (--数 + 10).ToString()

                输入框.Name = "输入框" + 名称[数]

                输入框.Parent = this

                输入框.Anchor = (AnchorStyles.Top | AnchorStyles.Left)

                输入框.Location = new Point(100 * 数, 0)

            }

void 按钮加_Click(object sender, EventArgs e)

        {

            四则运算("+")

        }

        void 按钮减_Click(object sender, EventArgs e)

        {

            四则运算("-")

        }

        void 按钮乘_Click(object sender, EventArgs e)

        {

            四则运算("*")

        }

        void 按钮除_Click(object sender, EventArgs e)

        {

            四则运算("/")

        }

        void 四则运算(string 运算符)

        {

            Control.ControlCollection 文本框 = this.Controls

            double 值1 = int.Parse(文本框[9].Text), 值2 = int.Parse(文本框[8].Text)

            switch(运算符)

            {

                case "+":

                    { 文本框[7].Text = (值1 + 值2).ToString()}

                    break

                case "-":

                    { 文本框[7].Text = (值1 - 值2).ToString()}

                    break

                case "*":

                    { 文本框[7].Text = (值1 * 值2).ToString()}

                    break

                case "/":

                    { 文本框[7].Text = (值1 / 值2).ToString()}

                    break

                default:

                    break

            }

        }

double a = Convert.ToDouble(textBox1.Text)

double b = Convert.ToDouble(textBox2.Text)

string s = Convert.ToString(comboBox1.Text)

if (s == "+")

textBox3.Text = Convert.ToString(a + b)

else if(s == "-")

textBox3.Text = Convert.ToString(a - b)

else if(s == "*")

textBox3.Text = Convert.ToString(a * b)

else if(s == "/")

textBox3.Text = Convert.ToString(a / b)

代码就是这些 在窗体添加3个textbox 一个combobox一个按钮就可以

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