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：
