C计算器代码有连加连成连乘连除的效果

1、C斜算器代码（有连加，连成，连乘，连除的效果）using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication1 public partial class Form1 : Form public Form1()InitializeComponent();private double Num1

2、 = 0;private double Num2 = 0;private int Op = 0;public void Calc(double n1, double n2, int op)double answer = 0;switch (op)case 1:answer = n1 + n2;break;case 2:answer = n1 - n2;break;case 3:answer = n1 * n2;break;case 4:answer = n1 / n2;break;TextBox1.Text = answer.ToString();public void setText(str

3、ing textest)TextBox1.Text += textest;private void Form1_Load(object sender, EventArgs e)sender,private void TextBox1_MaskInputRejected(objectMaskInputRejectedEventArgs e)private void button1_Click_1(object sender, EventArgs e)setText("1");private void button2_Click_1(object sender,

4、 EventArgs e)setText("2");private void deng_Click_1(object sender, EventArgs e)if (Num2 = 0)Num2 = double.Parse(TextBox1.Text);Calc(Num1, double.Parse(TextBox1.Text), Op);elseCalc(double.Parse(TextBox1.Text), Num2, Op);private void TextBox1_MaskInputRejected_1(object sender,MaskInp

5、utRejectedEventArgs e)private void button9_Click(object sender, EventArgs e)setText("7");private void jian_Click(object sender, EventArgs e)Num1 = double.Parse(TextBox1.Text);TextBox1.Text = " "Op = 2;private void cheng_Click(object sender, EventArgs e)Num1 = doub

6、le.Parse(TextBox1.Text);TextBox1.Text = " "Op = 3;private void chu_Click(object sender, EventArgs e)Num1 = double.Parse(TextBox1.Text);TextBox1.Text = " "Op = 4;private void button5_Click(object sender, EventArgs e)setText("3");private void butto

7、n6_Click(object sender, EventArgs e)setText("4"); private void button7_Click(object sender, EventArgse) setText("5");private void button8_Click(object sender, EventArgs e)setText("6");private void button10_Click(object sender, EventArgs e)setText

8、("8");private void button11_Click(object sender, EventArgs e)setText("9"); private void button13_Click(object sender, EventArgs e)setText("0");private void button3_Click(object sender, EventArgs e)TextBox1.Text = " "Num1 = 0;Num2 = 0;Op = 0;pr