实例介绍
【实例简介】
【实例截图】
【核心代码】
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 计算器
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
double num1;
double num2;
double yunsuan = 0;
double result;
bool DecimalFlag = false;
bool OperatorFlag = false;
string Operate;
public void NumClick(double num) //数字处理方法
{
if (!OperatorFlag)
{
if (DecimalFlag)
{
textBox1.Text = textBox1.Text num;
}
else
{
if (textBox1.Text == "0")
{
textBox1.Text = num "";
}
else
{
textBox1.Text = textBox1.Text num;
}
}
OperatorFlag = false;
}
else
textBox1.Text = num.ToString();
OperatorFlag = false;
}
private void Form1_Load(object sender, EventArgs e)
{
textBox1.ReadOnly = true;
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
textBox1.BackColor = Color.White;
}
private void button18_Click(object sender, EventArgs e) //清空键C
{
num1 = 0;
num2 = 0;
yunsuan = 0;
textBox1.Text = "0";
DecimalFlag = false;
OperatorFlag = false;
}
private void button1_Click(object sender, EventArgs e) //数字键0
{
NumClick(0);
}
private void button3_Click(object sender, EventArgs e) //数字键1
{
NumClick(1);
}
private void button4_Click(object sender, EventArgs e) //数字键2
{
NumClick(2);
}
private void button5_Click(object sender, EventArgs e) //数字键3
{
NumClick(3);
}
private void button6_Click(object sender, EventArgs e) //数字键4
{
NumClick(4);
}
private void button7_Click(object sender, EventArgs e) //数字键5
{
NumClick(5);
}
private void button8_Click(object sender, EventArgs e) //数字键6
{
NumClick(6);
}
private void button9_Click(object sender, EventArgs e) //数字键7
{
NumClick(7);
}
private void button10_Click(object sender, EventArgs e) //数字键8
{
NumClick(8);
}
private void button11_Click(object sender, EventArgs e) //数字键9
{
NumClick(9);
}
private void button2_Click(object sender, EventArgs e) //小数点
{
if (!DecimalFlag)
textBox1.Text = textBox1.Text ".";
else
textBox1.Text = textBox1.Text "";
DecimalFlag = true;
}
private void button12_Click(object sender, EventArgs e) //加号
{
OperatorFlag = true;
Operate = "add";
if (yunsuan == 0)
{
num1 = double.Parse(textBox1.Text);
textBox1.Text = num1.ToString();
}
else
{
num2 = double.Parse(textBox1.Text);
{
if (yunsuan == 1)
num1 = num1 num2;
else if (yunsuan == 2)
num1 = num1 - num2;
else if (yunsuan == 3)
num1 = num1 * num2;
else
num1 = num1 / num2;
}
textBox1.Text = num1.ToString();
}
yunsuan = 1;
DecimalFlag = false;
}
private void button13_Click(object sender, EventArgs e) //减号
{
OperatorFlag = true;
Operate = "minus";
if (yunsuan == 0)
{
num1 = double.Parse(textBox1.Text);
textBox1.Text = num1.ToString();
}
else
{
num2 = double.Parse(textBox1.Text);
{
if (yunsuan == 1)
num1 = num1 num2;
else if (yunsuan == 2)
num1 = num1 - num2;
else if (yunsuan == 3)
num1 = num1 * num2;
else
num1 = num1 / num2;
}
textBox1.Text = num1.ToString();
}
yunsuan = 2;
DecimalFlag = false;
}
private void button14_Click(object sender, EventArgs e) //乘号
{
OperatorFlag = true;
Operate = "multiply";
if (yunsuan == 0)
{
num1 = double.Parse(textBox1.Text);
textBox1.Text = num1.ToString();
}
else
{
num2 = double.Parse(textBox1.Text);
{
if (yunsuan == 1)
num1 = num1 num2;
else if (yunsuan == 2)
num1 = num1 - num2;
else if (yunsuan == 3)
num1 = num1 * num2;
else
num1 = num1 / num2;
}
textBox1.Text = num1.ToString();
}
yunsuan = 3;
DecimalFlag = false;
}
private void button15_Click(object sender, EventArgs e) //除号
{
OperatorFlag = true;
Operate = "divide";
if (yunsuan == 0)
{
num1 = double.Parse(textBox1.Text);
textBox1.Text = num1.ToString();
}
else
{
num2 = double.Parse(textBox1.Text);
{
if (yunsuan == 1)
num1 = num1 num2;
else if (yunsuan == 2)
num1 = num1 - num2;
else if (yunsuan == 3)
num1 = num1 * num2;
else
num1 = num1 / num2;
}
textBox1.Text = num1.ToString();
}
yunsuan = 4;
DecimalFlag = false;
}
private void button16_Click(object sender, EventArgs e) //等号
{
num2 = double.Parse(textBox1.Text);
switch (Operate)
{
case "add":
result = num1 num2;
textBox1.Text = result.ToString();
break;
case "minus":
result = num1 - num2;
textBox1.Text = result.ToString();
break;
case "multiply":
result = num1 * num2;
textBox1.Text = result.ToString();
break;
case "divide":
if (num2 == 0)
{
textBox1.Text = "除数不能为0";
}
else
{
result = num1 / num2;
textBox1.Text = result.ToString();
}
break;
}
OperatorFlag = true;
yunsuan = 0;
}
private void button17_Click(object sender, EventArgs e) //退格键
{
if (textBox1.Text == ""|| textBox1.Text=="0" || textBox1.Text.Length==1)
textBox1.Text = "0";
else
textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 1);
}
}
}
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