本文實例講述了C#實現(xiàn)簡單的計算器功能。分享給大家供大家參考，具體如下：
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) { //設(shè)置加號計算數(shù) SetNumber(Convert.ToDouble(_number)); if (_sign == null || _second == 10241024) { _sign = "+"; this.textBox1.Text += "+"; return; } if (_second != 10241024) { //開始進行計算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //驗證除數(shù)為零的情況 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; MessageBox.Show("除數(shù)不能為零！"); _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //開始初始化數(shù)據(jù) _sign = "+"; this.textBox1.Text += "+"; _second = 10241024; _number = null; return; } } private void button15_Click(object sender, EventArgs e) { //設(shè)置減號計算數(shù) SetNumber(Convert.ToDouble(_number)); if (_sign == null || _second == 10241024) { _sign = "-"; this.textBox1.Text += "-"; return; } if (_second != 10241024) { //開始進行計算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //驗證除數(shù)為零的情況 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; MessageBox.Show("除數(shù)不能為零！"); _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //開始初始化數(shù)據(jù) _sign = "-"; this.textBox1.Text += "-"; _second = 10241024; _number = null; return; } } private void button14_Click(object sender, EventArgs e) { //設(shè)置乘號計算數(shù) SetNumber(Convert.ToDouble(_number)); if (_sign == null || _second == 10241024) { _sign = "*"; this.textBox1.Text += "*"; return; } if (_second != 10241024) { //開始進行計算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //驗證除數(shù)為零的情況 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; MessageBox.Show("除數(shù)不能為零！"); _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //開始初始化數(shù)據(jù) _sign = "*"; this.textBox1.Text += "*"; _second = 10241024; _number = null; return; } } /// <summary> /// 設(shè)置除號計算數(shù) /// </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) { //開始進行計算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //驗證除數(shù)為零的情況 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; this.textBox1.Text = "除數(shù)不能為零！"; _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //開始初始化數(shù)據(jù) _sign = "/"; this.textBox1.Text += "/"; _second = 10241024; _number = null; return; } } /// <summary> /// 清空輸入框 /// </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)); //判斷是否設(shè)置了_second的值 if (_second == 10241024) { _second = Convert.ToDouble(_number); _number = null; } //判斷是否設(shè)置了_first的值 if (_first == 10241024) { _first = Convert.ToDouble(_number); _number = null; } //判斷是否有_sign的值 if (_sign == null) { _sign = "+"; } //開始進行計算 Computer ComPro = new Computer(_sign, _first, _second); this.textBox1.Text = ComPro.Comt(out _first).ToString(); //驗證除數(shù)為零的情況 if (_first == 10241024.10241023) { this.textBox1.Text = "0"; MessageBox.Show("除數(shù)不能為零！"); _number = null; _first = 10241024; _second = 10241024; this.textBox1.Text = null; _sign = null; this.textBox1.Text = null; } //開始初始化數(shù)據(jù) _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; } //選擇相應(yīng)的運算符進行運算 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; } } } //設(shè)置數(shù)字函數(shù) 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("請輸入數(shù)據(jù)"); 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("請輸入數(shù)據(jù)"); 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("請輸入數(shù)據(jù)"); 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("請輸入數(shù)據(jù)"); 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("請輸入數(shù)據(jù)"); 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> /// 計算e的temp1次冪 /// </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> /// 圓的面積 /// </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> /// 三角形面積 /// </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) { } }}運行效果：
PS：這里再為大家推薦幾款計算工具供大家進一步參考借鑒：
在線一元函數(shù)（方程）求解計算工具：
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科學(xué)計算器在線使用_高級計算器在線計算：
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在線計算器_標(biāo)準(zhǔn)計算器：
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更多關(guān)于C#相關(guān)內(nèi)容感興趣的讀者可查看本站專題：《C#數(shù)據(jù)結(jié)構(gòu)與算法教程》、《C#程序設(shè)計之線程使用技巧總結(jié)》、《C#常見控件用法教程》、《WinForm控件用法總結(jié)》、《C#數(shù)組操作技巧總結(jié)》及《C#面向?qū)ο蟪绦蛟O(shè)計入門教程》
希望本文所述對大家C#程序設(shè)計有所幫助。
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