简易计算器代码c#

using System;
using System.Collections.Generic;
using https://www.doczj.com/doc/42177082.html,ponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace shiyan2_12
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void btnPow_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);

txtFinal.Text = Convert.ToString(Math.Pow(a, b));
//lblShow.Text = a + "的" + b + "次方=";
//lblShow.Text += Math.Pow(a, b);

}

private void plus_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);
Double c = a + b;

txtFinal.Text = Convert.ToString(a + b);
//lblShow.Text = a + "+" + b + "=";
//lblShow.Text += c;
}

private void cut_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);
Double c = a - b;

txtFinal.Text = Convert.ToString(a - b);
//lblShow.Text = a + "-" + b + "="+c;
// lblShow.Text += ;
}

private void rid_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);
Double c = a * b;

txtFinal.Text = Convert.ToString(a * b);
//lblShow.Text = a + "x" + b + "=";
//lblShow.Text += c;
}

private void div_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);
Double c = a / b;

txtFinal.Text = Convert.ToString(a / b);
//lblShow.Text = a + "/" + b + "=";
//lblShow.Text += c;
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void Pi_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);
Double c = Math.PI;

txtFinal.Text = Convert.ToString(a * c);
}

private void e_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);

txtFinal.Text = Convert.ToString(a * (Math.E));
}

private void sin_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text)

;

txtFinal.Text = Convert.ToString(a*(Math.Sin(b)));
}

private void cos_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);

txtFinal.Text = Convert.ToString(a*(Math.Cos(b)));
}

private void tan_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);

txtFinal.Text = Convert.ToString(a*(Math.Tan(b)));
}

private void ln_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);

txtFinal.Text = Convert.ToString( a*(Math.Log(b)));
}

private void gen_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);

txtFinal.Text = Convert.ToString(a * (Math.Sqrt(b)));
}


private void jie_Click(object sender, EventArgs e)
{
Double a = Convert.ToDouble(textBox1.Text);
Double b = Convert.ToDouble(textBox2.Text);
double sum = 1;
for (double i = a; i > 0; i--)
sum *= i;


txtFinal.Text = Convert.ToString(b * (sum));
}





}
}