基于C# 下的计算器

1.图片




2.代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace FirstProgram
{
    public partial class Form1 : Form
    {
        double num1 = 0, num2 = 0;
        String CaculateMethod = "";
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {


        }

        private void button2_Click(object sender, EventArgs e)
        {
            MessageBox.Show("点击了播放按钮");
        }

        private void NumButton1_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "1";
        }

        private void NumButton2_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "2";
        }

        private void NumButton3_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "3";
        }

        private void NumButton4_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "4";
        }

        private void NumButton5_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "5";
        }

        private void NumButton6_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "6";
        }

        private void NumButton7_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "7";
        }

        private void NumButton8_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "8";
        }

        private void NumButton9_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "9";
        }

        private void NumButton0_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = OutputScreen.Text + "0";
        }

        private void ClearButton_Click(object sender, EventArgs e)
        {
            OutputScreen.Text = "";
        }

        private void DotButton_Click(object sender, EventArgs e)
        {
            if (OutputScreen.Text.Contains("."))
                return;
            OutputScreen.Text = OutputScreen.Text + ".";
        }

        private void PlusButton_Click(object sender, EventArgs e)
        {
            if (OutputScreen.Text == "")
                return;
            num1 = Convert.ToDouble(OutputScreen.Text);
            OutputScreen.Text = "";
            CaculateMethod = "+";
        }

        private void CaculateButton_Click(object sender, EventArgs e)
        {
            num2 = Convert.ToDouble(OutputScreen.Text);
            if (CaculateMethod == "+")
                OutputScreen.Text = (num1 + num2).ToString();
            else if (CaculateMethod == "-")
                OutputScreen.Text = (num1 - num2).ToString();
            else if (CaculateMethod == "X")
                OutputScreen.Text = (num1 * num2).ToString();
            else if (CaculateMethod == "/")
                OutputScreen.Text = (num1 / num2).ToString();
        }

        private void SubButton_Click(object sender, EventArgs e)
        {
            num1 = Convert.ToDouble(OutputScreen.Text);
            OutputScreen.Text = "";
            CaculateMethod = "-";
        }

        private void MultiButton_Click(object sender, EventArgs e)
        {
            num1 = Convert.ToDouble(OutputScreen.Text);
            OutputScreen.Text = "";
            CaculateMethod = "X";
        }

        private void DivButton_Click(object sender, EventArgs e)
        {
            num1 = Convert.ToDouble(OutputScreen.Text);
            OutputScreen.Text = "";
            CaculateMethod = "/";
        }

    }
}