1. 实验目的
（ 1）熟悉C#语言的使用和语法知识
2. 实验要求
（1）设计简单的含交互界面的计算器软件，具有较强的用户体验感。
（2）使用C#语言进行编程，创建窗体应用程序。
（3）实现较简单加减乘除等运算。
3. 运行效果如下：
4. 效果特点：
（1）每个按钮均可输入，但会阻止一些非法输入，例如，在没有输入数字的时候就输入运算符，点号的多次输入，这些都会阻止。
（2）实现了运算的优先级，即乘除是先与加减计算的。
（3）可实现小数的计算，即弥补了整型无法得打小数的缺陷
（4）增加了归零按钮，一键返回到初始状态
（5）按钮和键盘绑定，可实现键盘敲击时，界面按钮同时相应
（6）结果可继续运算，在点击“=”完成后，可在第二个文本框中输出结果，这时，如果在点击运算符，可对这个结果继续进行操作，实现完美的可继续性
5.代码如下：
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace 按键计算器 { public partial class Form1 : Form { double[] number = new double[50]; char[] operat = new char[50]; bool isNumber = false; bool isDot = false; bool isOperat = false; bool isEqual = false; int numberIndex = 0; int operatIndex = 0; int dotCount = 0; public Form1() { InitializeComponent(); btnleft.Hide(); btnright.Hide(); } //将键盘与按钮关联 protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { if (keyData == Keys.NumPad1||keyData==Keys.D1) { this.btn1.Focus(); this.btn1.PerformClick(); } if (keyData == Keys.NumPad2 || keyData == Keys.D2) { this.btn2.Focus(); this.btn2.PerformClick(); } if (keyData == Keys.NumPad3 || keyData == Keys.D3) { this.btn3.Focus(); this.btn3.PerformClick(); } if (keyData == Keys.NumPad4 || keyData == Keys.D4) { this.btn4.Focus(); this.btn4.PerformClick(); } if (keyData == Keys.NumPad5 || keyData == Keys.D5) { this.btn5.Focus(); this.btn5.PerformClick(); } if (keyData == Keys.NumPad6 || keyData == Keys.D6) { this.btn6.Focus(); this.btn6.PerformClick(); } if (keyData == Keys.NumPad7 || keyData == Keys.D7) { this.btn7.Focus(); this.btn7.PerformClick(); } if (keyData == Keys.NumPad8 || keyData == Keys.D8) { this.btn8.Focus(); this.btn8.PerformClick(); } if (keyData == Keys.NumPad9 || keyData == Keys.D9) { this.btn9.Focus(); this.btn9.PerformClick(); } if (keyData == Keys.NumPad0 || keyData == Keys.D0) { this.btn0.Focus(); this.btn0.PerformClick(); } if (keyData == Keys.Add) { this.btnadd.Focus(); this.btnadd.PerformClick(); } if (keyData == Keys.Subtract || keyData == Keys.OemMinus) { this.btnsub.Focus(); this.btnsub.PerformClick(); } if (keyData == Keys.Multiply) { this.btnmul.Focus(); this.btnmul.PerformClick(); } if (keyData == Keys.Divide) { this.btndiv.Focus(); this.btndiv.PerformClick(); } if (keyData == Keys.Enter || keyData == Keys.Oemplus) { this.btnequ.Focus(); this.btnequ.PerformClick(); } if (keyData == Keys.Back) { this.btncle.Focus(); this.btncle.PerformClick(); } return base.ProcessCmdKey(ref msg, keyData); } private void btn1_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text =""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "1"; textBox2.Text = textBox2.Text + "1"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn2_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "2"; textBox2.Text = textBox2.Text + "2"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn3_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "3"; textBox2.Text = textBox2.Text + "3"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn4_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "4"; textBox2.Text = textBox2.Text + "4"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn5_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "5"; textBox2.Text = textBox2.Text + "5"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn6_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "6"; textBox2.Text = textBox2.Text + "6"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn7_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "7"; textBox2.Text = textBox2.Text + "7"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn8_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "8"; textBox2.Text = textBox2.Text + "8"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn9_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "9"; textBox2.Text = textBox2.Text + "9"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btn0_Click(object sender, EventArgs e) { if (isEqual == true) { textBox1.Text = ""; textBox2.Text = ""; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } textBox1.Text = textBox1.Text + "0"; textBox2.Text = textBox2.Text + "0"; isNumber = true; isDot = false; isOperat = false; isEqual = false; } private void btnf_Click(object sender, EventArgs e) { if ((isNumber == true)&&(dotCount==0)) { textBox1.Text = textBox1.Text + "."; textBox2.Text = textBox2.Text + "."; dotCount++; isNumber = false; isDot = true; isOperat = false; isEqual = false; } } private void btnadd_Click(object sender, EventArgs e) { if (isEqual == true) { number[numberIndex] = double.Parse(textBox2.Text); operat[operatIndex] = '+'; textBox1.Text = textBox2.Text + "+"; textBox2.Text = ""; numberIndex++; operatIndex++; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } if ((isOperat==false)&&(isDot==false)&&(isNumber == true)) { number[numberIndex] = double.Parse(textBox2.Text); operat[operatIndex] = '+'; textBox1.Text = textBox1.Text + "+"; textBox2.Text = ""; numberIndex++; operatIndex++; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } } private void textBox1_TextChanged(object sender, EventArgs e) { } private void btnmul_Click(object sender, EventArgs e) { if (isEqual == true) { number[numberIndex] = double.Parse(textBox2.Text); operat[operatIndex] = '*'; textBox1.Text = textBox2.Text + "*"; textBox2.Text = ""; numberIndex++; operatIndex++; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } if ((isOperat == false) && (isDot == false) && (isNumber == true)) { number[numberIndex] = double.Parse(textBox2.Text); operat[operatIndex] = '*'; textBox1.Text = textBox1.Text + "*"; textBox2.Text = ""; numberIndex++; operatIndex++; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } } private void btndiv_Click(object sender, EventArgs e) { if (isEqual == true) { number[numberIndex] = double.Parse(textBox2.Text); operat[operatIndex] = '/'; textBox1.Text = textBox2.Text + "/"; textBox2.Text = ""; numberIndex++; operatIndex++; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } if ((isOperat == false) && (isDot == false) && (isNumber == true)) { number[numberIndex] = double.Parse(textBox2.Text); operat[operatIndex] = '/'; textBox1.Text = textBox1.Text + "/"; textBox2.Text = ""; numberIndex++; operatIndex++; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } } private void btnsub_Click(object sender, EventArgs e) { if (isEqual == true) { number[numberIndex] = double.Parse(textBox2.Text); operat[operatIndex] = '-'; textBox1.Text = textBox2.Text + "-"; textBox2.Text = ""; numberIndex++; operatIndex++; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } if ((isOperat == false) && (isDot == false) && (isNumber == true)) { number[numberIndex] = double.Parse(textBox2.Text); operat[operatIndex] = '-'; textBox1.Text = textBox1.Text + "-"; textBox2.Text = ""; numberIndex++; operatIndex++; dotCount = 0; isNumber = false; isDot = false; isOperat = true; isEqual = false; } } private void btnequ_Click(object sender, EventArgs e) { if (textBox2.Text != "") { number[numberIndex] = double.Parse(textBox2.Text); //判断乘除 for (int i = 0; i < operatIndex;) { //对乘号分析 if (operat[i] == '*') { number[i] = number[i] * number[i + 1]; for (int j = i + 1; j < operatIndex; j++) { number[j] = number[j + 1]; operat[j - 1] = operat[j]; } numberIndex--; operatIndex--; } //对除号分析 else if (operat[i] == '/') { number[i] = number[i] / number[i + 1]; for (int j = i + 1; j < operatIndex; j++) { number[j] = number[j + 1]; operat[j - 1] = operat[j]; } numberIndex--; operatIndex--; } else { i++; } } //判断加减 for (int i = 0; i < operatIndex;) { //对加号分析 if (operat[i] == '+') { number[i] = number[i] + number[i + 1]; for (int j = i + 1; j < operatIndex; j++) { number[j] = number[j + 1]; operat[j - 1] = operat[j]; } numberIndex--; operatIndex--; } //对减号分析 else if (operat[i] == '-') { number[i] = number[i] - number[i + 1]; for (int j = i + 1; j < operatIndex; j++) { number[j] = number[j + 1]; operat[j - 1] = operat[j]; } numberIndex--; operatIndex--; } else { i++; } } textBox2.Text = number[0].ToString(); isNumber = false; isDot = false; isOperat = false; isEqual = true; numberIndex = 0; operatIndex = 0; } } private void btncle_Click(object sender, EventArgs e) { isNumber = false; isDot = false; isOperat = false; isEqual = false; numberIndex = 0; operatIndex = 0; dotCount = 0; textBox1.Text = ""; textBox2.Text = ""; } private void btnleft_Click(object sender, EventArgs e) { } private void btnright_Click(object sender, EventArgs e) { } } }
