簡(jiǎn)易計(jì)算器C#

1、簡(jiǎn)易計(jì)算器 實(shí)驗(yàn)報(bào)告簡(jiǎn)易計(jì)算器實(shí)驗(yàn)報(bào)告院系： 信息工程學(xué)院 專(zhuān)業(yè)： 計(jì)算機(jī)科學(xué)與技術(shù) 學(xué)號(hào)： 2013 姓名： 2015年12月一：功能實(shí)現(xiàn) 實(shí)現(xiàn)簡(jiǎn)單的加減乘除運(yùn)算，平方開(kāi)方運(yùn)算（含小數(shù)點(diǎn)） 回刪功能，清零功能 輸入字符無(wú)長(zhǎng)度限制，輸出結(jié)果保留16位有效數(shù)字。超出16位數(shù)字按科學(xué)計(jì)數(shù)法表示 運(yùn)算結(jié)果清零前可以保留繼續(xù)進(jìn)行運(yùn)算，解決無(wú)法多次連算問(wèn)題二：主要控件 label 用于顯示框前提示 textbox 用于顯示輸入和輸出的字符 button 用于盛放數(shù)字和運(yùn)算符，點(diǎn)擊后觸發(fā)相應(yīng)事件三：主要代碼 public partial class Form1 : Form double a = 0; d

2、ouble b = 0; bool c = false; string d; double x;a用來(lái)存放結(jié)果，b用來(lái)存放第一個(gè)輸入的數(shù)據(jù)，d用來(lái)存放運(yùn)算符，x存放當(dāng)前textbox中的數(shù)據(jù)。數(shù)字鍵1-9對(duì)應(yīng)代碼為（用數(shù)字1舉例）： private void button1_Click(object sender, EventArgs e)/按鈕1 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "1" 數(shù)字0增加部分代碼，用于辨別除數(shù)不能為0： private void butt

3、on10_Click(object sender, EventArgs e)/按鈕0 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "0" if (d = "/") textBox1.Clear(); MessageBox.Show("除數(shù)不能為0", "錯(cuò)誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning); 加、減、乘、除、開(kāi)方、平方按鈕對(duì)應(yīng)代碼如下（以加號(hào)鍵舉例）：

4、 private void button13_Click(object sender, EventArgs e)/加號(hào)按鈕 c = true; b = double.Parse(textBox1.Text); d = "+" 小數(shù)點(diǎn)按鈕： private void button20_Click(object sender, EventArgs e)/小?數(shù)簓點(diǎn)? if (textBox1.Text = "") textBox1.Text = "0." else if (textBox1.Text.IndexOf(".&quo

5、t;) >= 0) MessageBox.Show("已經(jīng)添加了小數(shù)點(diǎn)！", "提示"); else textBox1.Text = textBox1.Text + "." 回刪按鈕： private void button12_Click(object sender, EventArgs e)/回刪按鈕 x = Convert.ToDouble(textBox1.Text); textBox1.Text = Convert.ToString(x - x % 10) / 10);/實(shí)現(xiàn)逐個(gè)刪除的功能 清零按鈕： private

6、void button17_Click(object sender, EventArgs e)/清零按鈕 textBox1.Text = "" 等號(hào)按鈕： private void button11_Click(object sender, EventArgs e)/按恪?鈕￥= switch (d) case "+": a = b + double.Parse(textBox1.Text); break; case "-": a = b - double.Parse(textBox1.Text); break; case "

7、;*": 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 "":a = Math.Sqrt(b); break; textBox1.Text = a + "" c = true; 四：運(yùn)行結(jié)果運(yùn)行后第一個(gè)界面加法 乘法（16位有效數(shù)字

8、） （減法和除法不再贅述）回刪：開(kāi)方： 平方： 源代碼：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 計(jì)算器 public partial class Form1 : Form double a = 0; double b = 0; bool c = false; stri

9、ng d; double x; public Form1() InitializeComponent(); private void Form1_Load(object sender, EventArgs e) textBox1.Text = "歡迎使用！" c =true; private void button1_Click(object sender, EventArgs e)/按鈕1 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "1" private

10、 void button2_Click(object sender, EventArgs e)/按鈕2 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "2" private void button3_Click(object sender, EventArgs e)/按鈕3 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "3" private void button

11、4_Click(object sender, EventArgs e)/按鈕4 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "4" private void button5_Click(object sender, EventArgs e)/按鈕5 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "5" private void button6_Click(obje

12、ct sender, EventArgs e)/按鈕6 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "6" private void button7_Click(object sender, EventArgs e)/按鈕7 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "7" private void button8_Click(object sender, E

13、ventArgs e)/按鈕8 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "8" private void button9_Click(object sender, EventArgs e)/按鈕9 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "9" private void button10_Click(object sender, EventArgs e)

14、/按鈕0 if (c = true) textBox1.Text = "" c = false; textBox1.Text += "0" if (d = "/") textBox1.Clear(); MessageBox.Show("除數(shù)不能為0", "錯(cuò)誤提示", MessageBoxButtons.OK, MessageBoxIcon.Warning); private void button11_Click(object sender, EventArgs e)/按鈕= switch (

15、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.P

16、arse(textBox1.Text); break; case "ì阾":a = Math.Sqrt(b); break; textBox1.Text = a + "" c = true; private void button19_Click(object sender, EventArgs e)/平方按鈕 c = true; b = double.Parse(textBox1.Text); d = "x²" private void button18_Click(object sender, EventArg

17、s e)/開(kāi)平方按鈕 c = true; b = double.Parse(textBox1.Text); d = "ì阾" private void button12_Click(object sender, EventArgs e)/回刪按鈕 x = Convert.ToDouble(textBox1.Text); textBox1.Text = Convert.ToString(x - x % 10) / 10);/實(shí)現(xiàn)逐個(gè)刪除的功能 private void button17_Click(object sender, EventArgs e)/清零按鈕 t

18、extBox1.Text = "" private void button13_Click(object sender, EventArgs e)/加號(hào)按鈕 c = true; b = double.Parse(textBox1.Text); d = "+" private void button14_Click(object sender, EventArgs e)/減號(hào)按鈕 c = true; b = double.Parse(textBox1.Text); d = "-" private void button15_Click(object sender, EventArgs e)/乘號(hào)按鈕 c = true; b = double.Parse(textBox1.Text); d = "*" private void button16_Click(object sender, EventArgs e)/除號(hào)按鈕 c = true; b = double.Parse(textBox1.Text); d = "/" pr