Nearth===015/c#练习题2（简易计算器）

编写一个简易计算器，具有简单的运算功能，能进行两个操作数的加、减、乘、除计算。

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 计算器
{
    public partial class Form1 : Form
    {
        double a = 0;
        double b = 0;
        bool c = false;
        string d;
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {

        }
        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else {
                textBox1.Text += "1";
            }
        }

       

        private void button2_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "2";
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "3";
            }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "4";
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "5";
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "6";
            }
        }

        private void button9_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "7";
            }
        }

        private void button8_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "8";
            }
        }

        private void button7_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "9";
            }
        }
        private void button12_Click(object sender, EventArgs e)
        {
            if (c == true)
            {
                textBox1.Text = "";
                c = false;
            }
            else
            {
                textBox1.Text += "0";
            }
        }
        private void button11_Click(object sender, EventArgs e)
        {
            c = true;
            b = double.Parse(textBox1.Text);
            d = "+";
        }
        private void button13_Click(object sender, EventArgs e)
        {
            c = true;
            b = double.Parse(textBox1.Text);
            d = "-";
        }

        private void button14_Click(object sender, EventArgs e)
        {
            c = true;
            b = double.Parse(textBox1.Text);
            d = "*";
        }

        private void button15_Click(object sender, EventArgs e)
        {
            c = true;
            b = double.Parse(textBox1.Text);
            d = "/";
        }
        private void button10_Click(object sender, EventArgs e)
        {
            switch(d){
                    case "+": a = b + double.Parse(textBox1.Text);
                    break;
                    case "-": a = b - double.Parse(textBox1.Text);
                    break;
                    case "*": a = b * double.Parse(textBox1.Text); 
                    break;
                    case "/": a = b / double.Parse(textBox1.Text);
                    break; 
            }
            textBox1.Text = a + "";
            c = true;
        }

        private void button16_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
        }

    }
}      

结果：

学习，有时候就是生活的一种享受~~~~~~~~~~~~~~