C#入门基础之计算器

实验目的及要求：
（1）掌握用 C#语言调试程序的基本方法；
（2）掌握用Visual Studio C#创建一个窗体应用程序，完成界面设计；
（3）依据实际逻辑关系，实现计算器的功能；
实验内容：
通过模拟小米手机自带计算器，完成计算器界面设计以及相关功能的实现。
实验环境：电脑+Visual Studio 2012
实验原理：
（1）通过Visual Studio 2012创建一个窗体应用程序；
（2）使用button和textbox控件设计计算器界面；
（3）依据实际逻辑关系，实现计算器功能
实验流程：
1.创建一个窗体应用程序，并命名为MyComputer；
2.使用button和textbox控件绘制计算器界面；
3.依据实际逻辑关系，编写代码，实现相关功能；
实验步骤：
1.界面设计

2.详细代码

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace Mycomputer2._0{    public partial class frmcs : Form    {        private double num1 = 0;    //第一操作数        private double num2;        //第二操作数        private string sign;        //运算符号        private double num3;        //运算结果        private bool check = true;  //检查是否为第一操作数        private bool check1 = true;        private double ans;         //记录上次运算结果        private string error = "Error";        public frmcs()        {            InitializeComponent();        }        private void button1_Click(object sender, EventArgs e)      //全部清除        {            textBox1.Text = "";     //文本框的值置空            textBox2.Text = "";            num1 = 0;            num2 = 0;            num3 = 0;            ans = 0;        }        private void button2_Click(object sender, EventArgs e)      //撤销操作数        {            textBox1.Text = "";     //文本框的值置空            if (check == true)            {                num1 = 0;            }             else            {                num2 = 0;            }        }        private void button3_Click(object sender, EventArgs e)      //除法运算        {            sign = "/";            textBox2.Text = num1.ToString();            textBox1.Text = "/";            check = false;        }        private void button4_Click(object sender, EventArgs e)      //乘法运算        {            sign = "*";            textBox2.Text = num1.ToString();            textBox1.Text = "*";            check = false;        }        private void button5_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                         Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button6_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button7_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button8_Click(object sender, EventArgs e)      //减法运算        {            sign = "-";            textBox2.Text = num1.ToString();            textBox1.Text = "-";            check = false;        }        private void button9_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button10_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button11_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button12_Click(object sender, EventArgs e)         //加法运算        {            sign = "+";            textBox2.Text = num1.ToString();            textBox1.Text = "+";            check = false;        }        private void button13_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button14_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button15_Click(object sender, EventArgs e)        {            if (check1 == true)            {                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                check1 = true;                if (check == true)                {                    Button b = (Button)sender;                  //将该按钮的属性值赋给按钮b                    textBox1.Text += b.Text;                    //追加文本框的值（PS：用于解决位数在两位或三位以上得值）                    num1 = double.Parse(textBox1.Text);         //将文本框的值强制为double类型，并赋值给num1                }                else                {                    textBox2.Text = textBox1.Text;                    textBox1.Text = "";                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void button16_Click(object sender, EventArgs e)         //“=”处理        {            switch (sign)            {                case "+":                    num3 = num1 + num2;                    break;                case "-":                    num3 = num1 - num2;                    break;                case "*":                    num3 = num1 * num2;                    break;                case "/":                    if (num2 == 0)                    {                        textBox1.Text = error;                    }                    else                    {                        num3 = num1 / num2;                    }                    break;                case "%":                    if (num2 == 0)                    {                        textBox1.Text = error;                    }                    else                    {                        num3 = num1 % num2;                    }                    break;            }            num1 = num3;            textBox1.Text = num3.ToString();            check = true;            check1 = false;        }        private void button17_Click(object sender, EventArgs e)         //求余运算        {            sign = "%";            textBox2.Text = num1.ToString();            textBox1.Text = "%";            check = false;        }        private void button18_Click(object sender, EventArgs e)        {            if (check == true)            {                Button b = (Button)sender;                textBox1.Text += b.Text;                num1 = double.Parse(textBox1.Text);            }            else            {                textBox2.Text = textBox1.Text;                textBox1.Text = "";                    Button b = (Button)sender;                textBox1.Text += b.Text;                num2 = double.Parse(textBox1.Text);            }        }        private void button19_Click(object sender, EventArgs e)     //小数点处理        {            if (textBox1.Text != "")                                //判断文本框不为空            {                if (check == true)                {                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num1 = double.Parse(textBox1.Text);                }                else if (check == false)                {                    Button b = (Button)sender;                    textBox1.Text += b.Text;                    num2 = double.Parse(textBox1.Text);                }            }        }        private void textBox2_TextChanged(object sender, EventArgs e)        {        }        private void textBox1_TextChanged(object sender, EventArgs e)        {        }    }}

实验结果：
本实验代码参考了大佬们的代码，其逻辑功能的实现相对较为容易，在模仿其代码后，所设计出来的计算器功能相对较简单，却没有完全模仿小米手机自带计算器，故在其基础上改编升级为MyComputer2.0，尽可能的模仿了小米手机自带计算器，当仍存在诸如除数为0,操作异常（PS:本想尝试用try-catch,当由于才接触C#，未能实现）；当操作数，直接先输入小数点，在输入数时操作异常等问题。还请大家帮我看看。给点改进意见，谢谢