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1、按钮布局如下图,顶上是TextBox控件,下面是20个button控件,还有一个链接控件,计划实现加减乘除,平方,开方,log, ln的功能

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2、如下图,单击其中一个button按钮,在右下方的属性里找到text并改名。

修改后的Form1编辑框如下图左边所示。

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3、双击Form1 窗体后,进入Form1.cs*界面,写入代码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace jisuangqi
{
     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)
       {
       }
  private void button9_Click(object sender, EventArgs e) // button9_Click是对应我的1键,如果单纯复制代码,但是跟我的窗体布局不同,一样会报错
        {                       // 算法没问题,只要单击相应的键,进入填入相应的算法即可
         if ( c ==true )
             {
             textBox1 .Text ="";
              c=false ;
             }
             textBox1.Text+="1";
          }
  private void button10_Click(object sender, EventArgs e) // button10_Click是对应我的2键
         {
             if(c==true )
               {
                 textBox1.Text="";
                c=false ;
           }
             textBox1.Text+="2";
           }
  private void button11_Click(object sender, EventArgs e)     //对应我的3键
         {
           if (c==true )
             {
                 textBox1 .Text ="";
                 c=false ;
            }
           textBox1 .Text +="3";
         }
  private void button5_Click(object sender, EventArgs e) //对应我的4键
         {
           if(c==true )
             {
               textBox1.Text="";
               c=false ;
           }
           textBox1.Text+="4";
           }
private void button6_Click(object sender, EventArgs e) //对应我的5键
           {
             if(c==true )
               {
                 textBox1.Text="";
                c=false ;
             }
             textBox1.Text+="5";
           }
   private void button7_Click(object sender, EventArgs e) //对应我的6键
         {
           if(c==true )
             {
               textBox1.Text="";
           c=false ;
           }
           textBox1.Text+="6";
           }
  private void button1_Click(object sender, EventArgs e) //对应我的7键
         {
           if(c==true )
             {
               textBox1.Text="";
               c=false ;
           }
          textBox1.Text+="7";
           }
private void button2_Click(object sender, EventArgs e) //对应我的8键
         {
             if(c==true )
             {
                textBox1.Text="";
               c=false ;
           }
         textBox1.Text+="8";
          }
private void button3_Click(object sender, EventArgs e) //对应我的9键
          {
           if(c==true )
             {
                 textBox1.Text="";
               c=false ;
               }
             textBox1.Text+="9";
           }
   private void button13_Click(object sender, EventArgs e) //对应我0的键,增加了除数不能为0的判断
           {
             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 button4_Click(object sender, EventArgs e) //对应我的+键
           {
               c = true;
              b = double.Parse(textBox1.Text);
             d = "+";
             }
   private void button8_Click(object sender, EventArgs e) //对应我的-键
           {
             c = true;
              b = double.Parse(textBox1.Text);
             d = "-";
             }
   private void button12_Click(object sender, EventArgs e) //对应我的*键
           {
              c = true;
              b = double.Parse(textBox1.Text);
            d = "*";
             }
  private void button16_Click(object sender, EventArgs e) //对应我的/键
           {
               c = true;
               b = double.Parse(textBox1.Text);
               d = "/";
             }
   private void button17_Click(object sender, EventArgs e) //对应我的平方键
           {
               c = true;
               b = double.Parse(textBox1.Text);
              d = "x2";
           }
   private void button18_Click(object sender, EventArgs e) //对应我的开方键
           {
               c = true;
              b = double.Parse(textBox1.Text);
              d = "sqrt";
            }
     private void button19_Click(object sender, EventArgs e) //对应我的log键
           {
               c = true;
               b = double.Parse(textBox1.Text);
                 d = "log";
             }
     private void button20_Click(object sender, EventArgs e) //对应我的ln键
           {
                 c = true;
               b = double.Parse(textBox1.Text);
                d = "ln";
           }
private void button15_Click(object sender, EventArgs e) //对应我的=键
           {
                 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;
                 case "log": a = Math.Log(double.Parse(textBox1.Text),b ); break;
              case "ln": a = Math.Log(b, Math.E); break;
             }
              textBox1.Text = a + "";
             c = true;
           }
private void button14_Click(object sender, EventArgs e) //对应我的c键,实现了清零的功能
           {
               textBox1.Text = "";
           }
/* private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
           {
             System.Diagnostics.Process.Start("http://home.cnblogs.com/u/linshuangxi/");
             }
*/
//我注释掉是因为这是一个连接到我的博客的地址,首先需要在窗体拖进来一个LinkLabel控件。
// 然后把注释去掉就可用了
  }
}

 

4、运行效果图:

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实验报告:

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