C# 迷你计算器源码(实现了加减乘除等基本功能)

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 TinyCalc{    public partial class Form1 : Form    {       double num1, num2, reasult;       bool decimalFlag = false;       bool res = false;       string myOperator;       //定义NumClick方法，点击数据按钮时，调用此方法，并且将数字追加到文本框       public void NumClick(int inputNumber)       {           if (decimalFlag) //小数           {                textBox1.Text = textBox1.Text inputNumber;           }           else //整数           {                if(textBox1.Text == "0.")                    textBox1.Text = inputNumber ".";                else                    textBox1.Text =textBox1.Text.Substring(0, textBox1.Text.Length - 1) inputNumber ".";           }                  }       public Form1()       {           InitializeComponent();       }        private void Form1_Load(object sender, EventArgse)       {           textBox1.Text = "0."; //初始显示得值位0           textBox1.TextAlign = HorizontalAlignment.Right; //右对齐       }        //小数点按钮单击事件       private void button11_Click(object sender, EventArgse)       {           decimalFlag = true;       }        //按钮 C 单击事件       private void button12_Click(object sender, EventArgse)       {           num1 = 0;           num2 = 0;           decimalFlag = false;           textBox1.Text = "0.";       }        //数字按钮0到9单击事件       private void button10_Click(object sender, EventArgse)       {           NumClick(0);       }        private void button1_Click(object sender, EventArgse)       {           NumClick(1);       }        private void button2_Click(object sender, EventArgse)       {           NumClick(2);       }        private void button3_Click(object sender, EventArgse)       {           NumClick(3);       }        private void button4_Click(object sender, EventArgse)       {           NumClick(4);       }        private void button5_Click(object sender, EventArgse)       {           NumClick(5);       }        private void button6_Click(object sender, EventArgse)       {           NumClick(6);       }        private void button7_Click(object sender, EventArgse)       {           NumClick(7);       }        private void button8_Click(object sender, EventArgse)       {           NumClick(8);       }        private void button9_Click(object sender, EventArgse)       {           NumClick(9);       }        // - * / 按钮事件       private void button13_Click(object sender, EventArgse)       {           myOperator = "add";           num1 = double.Parse(textBox1.Text);           textBox1.Text = "0.";           decimalFlag = false;       }        private void button14_Click(object sender, EventArgse)       {           myOperator = "sub";           num1 = double.Parse(textBox1.Text);           textBox1.Text = "0.";           decimalFlag = false;       }         private void button15_Click(object sender, EventArgse)       {           myOperator = "mul";           num1 = double.Parse(textBox1.Text);           textBox1.Text = "0.";           decimalFlag = false;       }       private void button16_Click(object sender, EventArgse)       {           myOperator = "div";           num1 = double.Parse(textBox1.Text);           textBox1.Text = "0.";           decimalFlag = false;       }         private voidtextBox1_TextChanged(object sender, EventArgse)       {        }        private voidtextBox1_TextChanged_1(object sender, EventArgse)       {        }        private void groupBox1_Enter(object sender, EventArgse)       {        }         //等号 = 点击事件        private void button17_Click(object sender, EventArgse)       {           num2 = double.Parse(textBox1.Text);           switch(myOperator)           {                case "add":                    reasult = num1 num2;                    textBox1.Text =reasult.ToString();                    break;                case "sub":                    reasult = num1 - num2;                    textBox1.Text =reasult.ToString();                    break;                case "mul":                   reasult = num1 * num2;                    textBox1.Text =reasult.ToString();                    break;                case "div":                    if(num2 == 0)                    {                        textBox1.Text = "除数不能为“0”！";                    }                    else {                        reasult = num1 / num2;                        textBox1.Text =reasult.ToString();                    }                    break;           }           res = true;       }    }}