C#實現(xiàn)的簡單整數(shù)四則運算計算器功能示例-創(chuàng)新互聯(lián)

本文實例講述了C#實現(xiàn)的簡單整數(shù)四則運算計算器功能。分享給大家供大家參考，具體如下：

新榮網(wǎng)站建設公司創(chuàng)新互聯(lián),新榮網(wǎng)站設計制作，有大型網(wǎng)站制作公司豐富經(jīng)驗。已為新榮上千提供企業(yè)網(wǎng)站建設服務。企業(yè)網(wǎng)站搭建\成都外貿(mào)網(wǎng)站建設公司要多少錢，請找那個售后服務好的新榮做網(wǎng)站的公司定做！

運行效果圖如下：

具體代碼如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace 計算器
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    public　string　num;
    public int flag;//用于判斷輸入的操作符
    public double num1, num2;
    private void num0_button_Click(object sender, EventArgs e)
    {
      num = num + "0";
      num2 = Convert.ToDouble(num);
      textBox.Text = num;
    }
    private void num1_button_Click(object sender, EventArgs e)//重點算法1
    {
      if (textBox.Text == "0")
      {
        num = "1";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "1";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void num2_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text == "0")
      {
        num = "2";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "2";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void num3_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text == "0")
      {
        num = "3";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "3";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void num4_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text == "0")
      {
        num = "4";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "4";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void num5_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text == "0")
      {
        num = "5";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "5";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void num6_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text == "0")
      {
        num = "6";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "6";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void num7_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text == "0")
      {
        num = "7";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "7";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void num8_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text == "0")
      {
        num = "8";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "8";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void num9_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text == "0")
      {
        num = "9";
        textBox.Text = Convert.ToString(num);
      }
      else
      {
        num = num + "9";
        num2 = Convert.ToDouble(num);
        textBox.Text = num;
      }
    }
    private void add_button_Click(object sender, EventArgs e)//重點算法2
    {
      if (textBox.Text.Length > 0)
      {
        num1 = Convert.ToDouble(textBox .Text);
        num = "";
        flag = 1;
        textBox.Text = "";
        textBox.Focus();
      }
    }
    private void dev_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text.Length > 0)
      {
        num1 = Convert.ToDouble(textBox.Text);
        num = "";
        flag = 2;
        textBox.Text = "";
        textBox.Focus();
      }
    }
    private void mul_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text.Length > 0)
      {
        num1 = Convert.ToDouble(textBox.Text);
        num = "";
        flag = 3;
        textBox.Text = "";
        textBox.Focus();
      }
    }
    private void chu_button_Click(object sender, EventArgs e)
    {
      if (textBox.Text.Length > 0)
      {
        num1 = Convert.ToDouble(textBox.Text);
        num = "";
        flag = 4;
        // textBox.Text = "";
        textBox.Focus();
      }
    }
    private void equ_button_Click(object sender, EventArgs e)
    {
      switch (flag)
      {
        case 1:
          textBox.Text = Convert.ToString(num1+Convert .ToDouble(num));//重點算法3
          num2 = Convert.ToDouble(textBox .Text);
          break;
        case 2:
          textBox.Text = Convert.ToString(num1 - Convert.ToDouble(num));
          num2 = Convert.ToDouble(textBox.Text);
          break;
        case 3:
          textBox.Text = Convert.ToString(num1 * Convert.ToDouble(num));
          num2 = Convert.ToDouble(textBox.Text);
          break;
        case 4:
          textBox.Text = Convert.ToString(num1 / Convert.ToDouble(num));
          num2 = Convert.ToDouble(textBox.Text);
          break;
      }
    }
    private void re_button_Click(object sender, EventArgs e)
    {
      num = "";
      textBox.Text = "0";
    }
  }
}

另外有需要云服務器可以了解下創(chuàng)新互聯(lián)scvps.cn，海內(nèi)外云服務器15元起步，三天無理由+7*72小時售后在線，公司持有idc許可證，提供“云服務器、裸金屬服務器、高防服務器、香港服務器、美國服務器、虛擬主機、免備案服務器”等云主機租用服務以及企業(yè)上云的綜合解決方案，具有“安全穩(wěn)定、簡單易用、服務可用性高、性價比高”等特點與優(yōu)勢，專為企業(yè)上云打造定制，能夠滿足用戶豐富、多元化的應用場景需求。

網(wǎng)站名稱：C#實現(xiàn)的簡單整數(shù)四則運算計算器功能示例-創(chuàng)新互聯(lián)
轉(zhuǎn)載來于：http://muchs.cn/article32/dsehsc.html

成都網(wǎng)站建設公司_創(chuàng)新互聯(lián)，為您提供App開發(fā)、網(wǎng)站收錄、品牌網(wǎng)站建設、Google、App設計、移動網(wǎng)站建設

廣告

聲明：本網(wǎng)站發(fā)布的內(nèi)容（圖片、視頻和文字）以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主，如果涉及侵權(quán)請盡快告知，我們將會在第一時間刪除。文章觀點不代表本網(wǎng)站立場，如需處理請聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載，或轉(zhuǎn)載時需注明來源： 創(chuàng)新互聯(lián)