本文实例讲述了C#实现简单的计算器功能。分享给大家供大家参考，具体如下：

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;using System.Collections;using System.Threading;using System.Diagnostics;namespace CALCULATOR{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private string _sign; private double _first = 10241024; private double _second = 10241024; private string _number; private void button1_Click(object sender, EventArgs e) { _number += "1"; this.textBox1.Text += "1"; } private void button2_Click(object sender, EventArgs e) { _number += "2"; this.textBox1.Text += "2"; } private void button3_Click(object sender, EventArgs e) { _number += "3"; this.textBox1.Text += "3"; } private void button4_Click(object sender, EventArgs e) { _number += "4"; this.textBox1.Text += "4"; } private void button8_Click(object sender, EventArgs e) { _number += "5"; this.textBox1.Text += "5"; } private void button7_Click(object sender, EventArgs e) { _number += "6"; this.textBox1.Text += "6"; } private void button6_Click(object sender, EventArgs e) { _number += "7"; this.textBox1.Text += "7"; } private void button5_Click(object sender, EventArgs e) { _number += "8"; this.textBox1.Text += "8"; } private void button9_Click(object sender, EventArgs e) { _number += "9"; this.textBox1.Text += "9"; } private void button10_Click(object sender, EventArgs e) { _number += "0"; this.textBox1.Text += "0"; } private void button16_Click(object sender, EventArgs e) { //设置加号计算数 SetNumber(Convert.ToDouble(_number)); if (_sign == null || _second == 10241024) { _sign = "+"; this.textBox1.Text += "+"; return; } if (_second != 10241024) { //开始进行计算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //验证除数为零的情况 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; MessageBox.Show("除数不能为零！"); _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //开始初始化数据 _sign = "+"; this.textBox1.Text += "+"; _second = 10241024; _number = null; return; } } private void button15_Click(object sender, EventArgs e) { //设置减号计算数 SetNumber(Convert.ToDouble(_number)); if (_sign == null || _second == 10241024) { _sign = "-"; this.textBox1.Text += "-"; return; } if (_second != 10241024) { //开始进行计算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //验证除数为零的情况 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; MessageBox.Show("除数不能为零！"); _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //开始初始化数据 _sign = "-"; this.textBox1.Text += "-"; _second = 10241024; _number = null; return; } } private void button14_Click(object sender, EventArgs e) { //设置乘号计算数 SetNumber(Convert.ToDouble(_number)); if (_sign == null || _second == 10241024) { _sign = "*"; this.textBox1.Text += "*"; return; } if (_second != 10241024) { //开始进行计算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //验证除数为零的情况 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; MessageBox.Show("除数不能为零！"); _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //开始初始化数据 _sign = "*"; this.textBox1.Text += "*"; _second = 10241024; _number = null; return; } } /// <summary> /// 设置除号计算数 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button11_Click(object sender, EventArgs e) { SetNumber(Convert.ToDouble(_number)); if (_sign == null || _second == 10241024) { _sign = "/"; this.textBox1.Text += "/"; return; } if (_second != 10241024) { //开始进行计算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //验证除数为零的情况 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; this.textBox1.Text = "除数不能为零！"; _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //开始初始化数据 _sign = "/"; this.textBox1.Text += "/"; _second = 10241024; _number = null; return; } } /// <summary> /// 清空输入框 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button12_Click(object sender, EventArgs e) { _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } private void button13_Click(object sender, EventArgs e) { SetNumber(Convert.ToDouble(_number)); //判断是否设置了_second的值 if (_second == 10241024) { _second = Convert.ToDouble(_number); _number = null; } //判断是否设置了_first的值 if (_first == 10241024) { _first = Convert.ToDouble(_number); _number = null; } //判断是否有_sign的值 if (_sign == null) { _sign = "+"; } //开始进行计算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //验证除数为零的情况 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; MessageBox.Show("除数不能为零！"); _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //开始初始化数据 _sign = null; _second = 10241024; _number = null; } public class Computer { private string _sign; private double _first; private double _second; public Computer(string str, double first, double second) { _sign = str; _first = first; _second = second; } //选择相应的运算符进行运算 public double Comt(out double first) { if (_sign == "+") { first = _first + _second; return _first + _second; } else if (_sign == "-") { first = _first - _second; return _first - _second; } else if (_sign == "*") { first = _first * _second; return _first * _second; } else if (_sign == "/") { if (_second == 0) { first = 10241024.10241023; return 10241024.10241023; } else { first = _first / _second; return _first / _second; } } else { first = 10241024.10241024; return 10241024.10241024; } } } //设置数字函数 public void SetNumber(double number) { if (_first == 10241024 && _number != null) { _first = Convert.ToDouble(_number); _number = null; } else if (_second == 10241024 && _number != null) { _second = Convert.ToDouble(_number); _number = null; } } private void timer1_Tick(object sender, EventArgs e) { this.label2.Text = DateTime.Now.ToString(); } private void button24_Click(object sender, EventArgs e) { if (this.textBox1.Text == " ") { MessageBox.Show("请输入数据"); this.textBox1.Text = Convert.ToInt64(textBox1.Text.ToString(), 2).ToString(); } else { this.textBox1.Text = Convert.ToInt64(textBox1.Text.ToString(), 2).ToString(); } } private void button22_Click(object sender, EventArgs e) { if (this.textBox1.Text == " ") { MessageBox.Show("请输入数据"); Int64 int64 = Convert.ToInt64(textBox1.Text.ToString(), 2); this.textBox1.Text = Convert.ToString(int64,16); } else { Int64 int64 = Convert.ToInt64(textBox1.Text.ToString(), 2); this.textBox1.Text = Convert.ToString(int64, 16); } } private void button23_Click(object sender, EventArgs e) { if (this.textBox1.Text == " ") { MessageBox.Show("请输入数据"); Int64 int64 = Convert.ToInt64(textBox1.Text.ToString(), 2); this.textBox1.Text = Convert.ToString(int64, 8); } else { Int64 int64 = Convert.ToInt64(textBox1.Text.ToString(), 2); this.textBox1.Text = Convert.ToString(int64, 8); } } private void button21_Click(object sender, EventArgs e) { if (this.textBox1.Text == " ") { MessageBox.Show("请输入数据"); Int64 int64 = Convert.ToInt64(textBox1.Text); this.textBox1.Text = Convert.ToString(int64, 2); } else { Int64 int64 = Convert.ToInt64(textBox1.Text); this.textBox1.Text = Convert.ToString(int64, 2); } } private void button27_Click(object sender, EventArgs e) { double buffer1= Convert.ToDouble(textBox1.Text); buffer1 = 1 / buffer1; this.textBox1.Text = buffer1.ToString(); } private void button17_Click(object sender, EventArgs e) { _number += "."; this.textBox1.Text += "."; } private void button25_Click(object sender, EventArgs e) { double buffer1 = Convert.ToDouble(textBox1.Text); buffer1 = buffer1 * buffer1; this.textBox1.Text = buffer1.ToString(); } private void button26_Click(object sender, EventArgs e) { if (this.textBox1.Text == " ") { MessageBox.Show("请输入数据"); Int64 int64 = Convert.ToInt64(this.textBox1.Text); Int64 temp1 = 1; while (int64 > 1) { temp1 = temp1*int64 ; int64--; } this.textBox1.Text = temp1.ToString(); } else { Int64 int64 = Convert.ToInt64(this.textBox1.Text); Int64 temp1 = 1; while (int64 > 1) { temp1 = temp1 * int64; int64--; } this.textBox1.Text = temp1.ToString(); } } private void button28_Click(object sender, EventArgs e) { //Int64 int64 = Convert.ToInt64(this.textBox1.Text); //double temp=Math.Log10(int64); //this.textBox1.Text = temp.ToString(); Double temp1, temp2; string[] STRarry = new string[2]; STRarry = this.textBox1.Text.Split('.'); temp1 = Convert.ToDouble(STRarry[0]); temp2 = Convert.ToDouble(STRarry[1]); // double temp1 = Convert.ToDouble(this.textBox1.Text); temp2 = Math.Log(temp2,temp1 ); this.textBox1.Text = temp2.ToString(); } private void button18_Click(object sender, EventArgs e) { double temp1 = Convert.ToDouble(this.textBox1.Text); double temp2 = Math.Sin(temp1); this.textBox1.Text = temp2.ToString(); } private void button19_Click(object sender, EventArgs e) { double temp1 = Convert.ToDouble(this.textBox1.Text); double temp2 = Math.Cos(temp1); this.textBox1.Text = temp2.ToString(); } private void button20_Click(object sender, EventArgs e) { double temp1 = Convert.ToDouble(this.textBox1.Text); double temp2 = Math.Tan(temp1); this.textBox1.Text = temp2.ToString(); } private void button33_Click(object sender, EventArgs e) { Double temp1, temp2; string[] STRarry=new string[2]; STRarry=this.textBox1.Text.Split('.'); temp1 = Convert.ToDouble(STRarry[0]); temp2 = Convert.ToDouble(STRarry[1]); // double temp1 = Convert.ToDouble(this.textBox1.Text); temp2 = Math.Pow(temp1,temp2); this.textBox1.Text = temp2.ToString(); } /// <summary> /// 计算e的temp1次幂 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button31_Click(object sender, EventArgs e) { double temp1 = Convert.ToDouble(this.textBox1.Text); double temp2 = Math.Exp(temp1); this.textBox1.Text = temp2.ToString(); } private void button34_Click(object sender, EventArgs e) { double temp1 = Convert.ToDouble(this.textBox1.Text); double temp2 = Math.Sqrt(temp1); this.textBox1.Text = temp2.ToString(); } private void button32_Click(object sender, EventArgs e) { Double temp1, temp2; string[] STRarry = new string[2]; STRarry = this.textBox1.Text.Split('.'); temp1 = Convert.ToDouble(STRarry[0]); temp2 = Convert.ToDouble(STRarry[1]); // double temp1 = Convert.ToDouble(this.textBox1.Text); temp2 = Math.IEEERemainder(temp1, temp2); this.textBox1.Text = temp2.ToString(); } /// <summary> /// 圆的面积 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button30_Click(object sender, EventArgs e) { double buffer1 = Convert.ToDouble(textBox1.Text); buffer1 =3.1415926*buffer1*buffer1; this.textBox1.Text = buffer1.ToString(); } /// <summary> /// 三角形面积 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button29_Click(object sender, EventArgs e) { Double temp1, temp2,temp3,p,area; string[] STRarry = new string[3]; STRarry = this.textBox1.Text.Split('.'); temp1 = Convert.ToDouble(STRarry[0]); temp2 = Convert.ToDouble(STRarry[1]); temp3 = Convert.ToDouble(STRarry[2]); // double temp1 = Convert.ToDouble(this.textBox1.Text); p = (temp1 + temp2 + temp3) / 2; area= p * (p - temp1) * (p - temp2) * (p - temp3); area = Math.Sqrt(area); this.textBox1.Text = area.ToString(); } private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { string str = e.Link.ToString(); Process.Start(str); } private void Form1_Load(object sender, EventArgs e) { } }}

运行效果：

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#数组操作技巧总结》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。