初学C# | 使用Windows窗体应用编写简单的计算器软件

如何在VS中使用Windows窗体应用编写一个计算器？

Windows窗体应用使用的编程语言主要是微软自家的C#开发语言，不管学习任何语言，通过编写一些小项目，对于语言的理解和运用是很有帮助的；

而计算器就是一个很好的小项目，我之前用过C++来编写计算器，但是相比C#来说，C++要麻烦的多，要设计文法，还要设计文法，考虑容错，不想WinForm窗体那样来的简单粗暴；

1. 首先，通过拖拽控件设计好布局；

这里我主要使用了一个Textbox控件，和十九个Button控件，摆好控件后就把Button控件的text属性设置好；

2. 然后开始编写后台的代码逻辑的实现部分；

using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace Calculater{public partial class Form1 : Form{double a = 0;double b = 0;bool c = false;string d;public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){}//button 0private void button2_Click(object sender, EventArgs e){if (c == true){ textBox1.Text = "";c = false;}textBox1.Text += "0";if (d == "/"){textBox1.Clear();MessageBox.Show("除数不能为零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);}}private void button5_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "1";}private void button6_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "2";}private void button7_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "3";}private void button9_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "4";}private void button10_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "5";}private void button11_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "6";}private void button13_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "7";}private void button14_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "8";}private void button15_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += "9";}private void button1_Click(object sender, EventArgs e){if (c == true){textBox1.Text = "";c = false;}textBox1.Text += ".";}private void button4_Click(object sender, EventArgs e){c = true;b = double.Parse(textBox1.Text);d = "+";}private void button8_Click(object sender, EventArgs e){c = true;b = double.Parse(textBox1.Text);d = "-";}private void button12_Click(object sender, EventArgs e){c = true;b = double.Parse(textBox1.Text);d = "*";}private void button16_Click(object sender, EventArgs e){c = true;b = double.Parse(textBox1.Text);d = "/";}private void button21_Click(object sender, EventArgs e){c = true;b = double.Parse(textBox1.Text);d = "x2";}private void button20_Click(object sender, EventArgs e){c = true;b = double.Parse(textBox1.Text);d = "sqrt";}private void button3_Click(object sender, EventArgs e){switch (d){ case "+":a = b + double.Parse(textBox1.Text);break;case "-":a = b - double.Parse(textBox1.Text);break;case "*":a = b * double.Parse(textBox1.Text);break;case "/":a = b / double.Parse(textBox1.Text);break;case "x2":a = b * double.Parse(textBox1.Text);break;case "sqrt":a = Math.Sqrt(b);break;}textBox1.Text = a + "";c = true;}private void button17_Click(object sender, EventArgs e){textBox1.Text = "";}}}

注意：我这里的控件名跟你的可能不一致！

如有错误，请指正，谢谢。