C#窗体程序，简易计算器

原创于 2019-05-11 19:03:01 发布 · 5.3k 阅读

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本文详细介绍了使用C#创建一个简易计算器的过程，包括按钮事件处理、数字与操作符输入、运算逻辑实现及清屏功能。通过实例代码展示了如何在Windows Forms应用中实现基本的算术运算。

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)//数字类按钮事件
{
btn = (Button)sender;
textBox1.Text += btn.Text;
number1 = Convert.ToDouble(textBox1.Text);
}

private void btnOp_Click(object sender, EventArgs e)//操作类按钮事件
{
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";
}


}
}