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数学计算器有很多种实现方式,这是其中比较笨的一种,仅供参考。
using System;
using System.Windows.Forms;
namespace WindowsFormsApp9
{
public partial class Form1 : Form
{
public double x = 0;
public double y = 0;
public double jieguo = 0;
public char fuhao = '0';
public bool ky = false;
public Form1()
{
InitializeComponent();
}
public void yunshuan()
{
switch (fuhao)
{
case ' ':
{
jieguo = x y;
}
break;
case '-':
{
jieguo = x - y;
}
break;
case '*':
{
jieguo = x * y;
}
break;
case '/':
{
jieguo = x / y;
}
break;
default:
break;
}
}
private void buttonDEN_Click(object sender, EventArgs e)
{
ky = false;
x = jieguo;
this.textBox1.Text = Convert.ToString(jieguo);
}
private void buttonJIA_Click(object sender, EventArgs e)
{
if(ky==true)
{
ky = false;
x = jieguo;
}
fuhao = ' ';
ky = true;
this.textBox1.Text = "0";
}
private void buttonJIAN_Click(object sender, EventArgs e)
{
if (ky == true)
{
ky = false;
x = jieguo;
}
fuhao = '-';
ky = true;
this.textBox1.Text = "0";
}
private void buttonCHENG_Click(object sender, EventArgs e)
{
if (ky == true)
{
ky = false;
x = jieguo;
}
fuhao = '*';
ky = true;
this.textBox1.Text = "0";
}
private void buttonCHU_Click(object sender, EventArgs e)
{
if (ky == true)
{
ky = false;
x = jieguo;
}
fuhao = '/';
ky = true;
this.textBox1.Text = "0";
}
private void button0_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "0";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "0";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button1_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "1";
}
else if(this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "1";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button2_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "2";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "2";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button3_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "3";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "3";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button4_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "4";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "4";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button5_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "5";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "5";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button6_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "6";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "6";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button7_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "7";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "7";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button8_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "8";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "8";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void button9_Click(object sender, EventArgs e)
{
if (this.textBox1.Text == "0")
{
this.textBox1.Text = "9";
}
else if (this.textBox1.Text.Length < 9)
{
this.textBox1.Text = "9";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void buttonDIAN_Click(object sender, EventArgs e)
{
string str = ".";
if (this.textBox1.Text.Contains(str))
{
return;
}
else if (this.textBox1.Text.Length < 8)
{
this.textBox1.Text = ".";
}
if (ky == false)
{
x = Convert.ToDouble(this.textBox1.Text);
}
else if (ky == true)
{
y = Convert.ToDouble(this.textBox1.Text);
yunshuan();
}
}
private void buttonRESET_Click(object sender, EventArgs e)
{
x = 0;
y = 0;
jieguo = 0;
fuhao = '0';
ky = false;
this.textBox1.Text = "0";
}
}
}