C#实现的简单整数四则运算计算器功能示例

概述本文实例讲述了C#实现的简单整数四则运算计算器功能。分享给大家供大家参考，具体如下：

本文实例讲述了C#实现的简单整数四则运算计算器功能。分享给大家供大家参考，具体如下：

运行效果图如下：

具体代码如下：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.windows.Forms;namespace 计算器{  public partial class Form1 : Form  {    public Form1()    {      InitializeComponent();    }    public　string　num;    public int flag;//用于判断输入的 *** 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)//重点算法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)//重点算法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));//重点算法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";    }  }}

PS：这里再为大家推荐几款计算工具供大家进一步参考借鉴：

在线一元函数（方程）求解计算工具：
http://tools.jb51.net/jisuanqi/equ_jisuanqi

科学计算器在线使用_高级计算器在线计算：
http://tools.jb51.net/jisuanqi/jsqkexue

在线计算器_标准计算器：
http://tools.jb51.net/jisuanqi/jsq

更多关于C#相关内容感兴趣的读者可查看本站专题：《C#数据结构与算法教程》、《C#程序设计之线程使用技巧总结》、《C#常见控件用法教程》、《WinForm控件用法总结》、《C#数组 *** 作技巧总结》及《C#面向对象程序设计入门教程》

希望本文所述对大家C#程序设计有所帮助。

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