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| 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 WindowsFormsApp1
{
public partial class Form1 : Form
{
public string s;
public double number1 = 0;
public double number2 = 0;
Button btn;
public Form1()
{
InitializeComponent();
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void btnNum_Click(object sender, EventArgs e)
{
btn = (Button)sender;
textBox1.Text += btn.Text;
number1 = Convert.ToDouble(textBox1.Text);
}
private void btnOp_Click(object sender, EventArgs e)
{
btn = (Button)sender;
if(btn.Text!="=")
{
s = btn.Text;
textBox1.Text = "";
}
else
{
if(textBox1.Text!="")
{
number2 = Convert.ToDouble(textBox1.Text);
switch (s)
{
case "+":
textBox1.Text = (number1 + number2).ToString();
break;
case "-":
textBox1.Text = (number1 - number2).ToString();
break;
case "*":
textBox1.Text = (number1 * number2).ToString();
break;
case "/":
if (number2 == 0)
textBox1.Text = "错误";
else
textBox1.Text = (number1 / number2).ToString();
break;
}
}
else
{
textBox1.Text = "错误";
}
}
}
private void btnC_Click(object sender, EventArgs e)
{
textBox1.Text = "";
}
}
}
需要对按钮定义事件：
|
