winform写一个计算器

好的，以下是一个简单的 WinForm 计算器的代码示例：

using System;
using System.Windows.Forms;

namespace Calculator
{
    public partial class Form1 : Form
    {
        double num1 = 0;
        double num2 = 0;
        string operation = "";

        public Form1()
        {
            InitializeComponent();
        }

        private void button_Click(object sender, EventArgs e)
        {
            Button button = (Button)sender;

            if (textBox_Result.Text == "0")
            {
                textBox_Result.Clear();
            }

            if (button.Text == ".")
            {
                if (!textBox_Result.Text.Contains("."))
                {
                    textBox_Result.Text = textBox_Result.Text + button.Text;
                }
            }
            else
            {
                textBox_Result.Text = textBox_Result.Text + button.Text;
            }
        }

        private void operator_Click(object sender, EventArgs e)
        {
            Button button = (Button)sender;

            if (num1 != 0)
            {
                button_Equals.PerformClick();
                operation = button.Text;
                label_CurrentOperation.Text = num1 + " " + operation;
                num1 = double.Parse(textBox_Result.Text);
            }
            else
            {
                operation = button.Text;
                num1 = double.Parse(textBox_Result.Text);
                label_CurrentOperation.Text = num1 + " " + operation;
                textBox_Result.Clear();
            }
        }

        private void button_Clear_Click(object sender, EventArgs e)
        {
            textBox_Result.Text = "0";
            num1 = 0;
            num2 = 0;
            label_CurrentOperation.Text = "";
        }

        private void button_Equals_Click(object sender, EventArgs e)
        {
            num2 = double.Parse(textBox_Result.Text);

            switch (operation)
            {
                case "+":
                    textBox_Result.Text = (num1 + num2).ToString();
                    break;
                case "-":
                    textBox_Result.Text = (num1 - num2).ToString();
                    break;
                case "*":
                    textBox_Result.Text = (num1 * num2).ToString();
                    break;
                case "/":
                    textBox_Result.Text = (num1 / num2).ToString();
                    break;
                default:
                    break;
            }

            num1 = double.Parse(textBox_Result.Text);
            label_CurrentOperation.Text = "";
        }
    }
}

这个计算器使用了 WinForm 控件，包括文本框、按钮和标签。它支持加、减、乘、除和小数点等操作。