C#实现按键计算器功能2(增强版)
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[];
char[] operat = new char[];
bool isNumber = false;
bool isDot = false;
bool isOperat = false;
bool isEqual = false; int numberIndex = ;
int operatIndex = ; int dotCount = ; 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 = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; }
textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false; } private void btn2_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; } textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false; } private void btn3_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; } textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false; } private void btn4_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; } textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false; } private void btn5_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; } textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false; } private void btn6_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; } textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + "";
isNumber = true;
isDot = false;
isOperat = false;
isEqual = false;
} private void btn7_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; } textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false;
} private void btn8_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; } textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false;
} private void btn9_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; }
textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false;
} private void btn0_Click(object sender, EventArgs e)
{
if (isEqual == true)
{ textBox1.Text = "";
textBox2.Text = ""; dotCount = ;
isNumber = false;
isDot = false;
isOperat = true;
isEqual = false; }
textBox1.Text = textBox1.Text + "";
textBox2.Text = textBox2.Text + ""; isNumber = true;
isDot = false;
isOperat = false;
isEqual = false;
} private void btnf_Click(object sender, EventArgs e)
{
if ((isNumber == true)&&(dotCount==))
{
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 = ;
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 = ;
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 = ;
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 = ;
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 = ;
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 = ;
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 = ;
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 = ;
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 = ; i < operatIndex;)
{ //对乘号分析
if (operat[i] == '*')
{
number[i] = number[i] * number[i + ];
for (int j = i + ; j < operatIndex; j++)
{
number[j] = number[j + ];
operat[j - ] = operat[j]; }
numberIndex--;
operatIndex--; }
//对除号分析
else if (operat[i] == '/')
{
number[i] = number[i] / number[i + ];
for (int j = i + ; j < operatIndex; j++)
{
number[j] = number[j + ];
operat[j - ] = operat[j]; }
numberIndex--;
operatIndex--; }
else
{ i++; } } //判断加减
for (int i = ; i < operatIndex;)
{ //对加号分析
if (operat[i] == '+')
{
number[i] = number[i] + number[i + ];
for (int j = i + ; j < operatIndex; j++)
{
number[j] = number[j + ];
operat[j - ] = operat[j]; }
numberIndex--;
operatIndex--; }
//对减号分析
else if (operat[i] == '-')
{
number[i] = number[i] - number[i + ];
for (int j = i + ; j < operatIndex; j++)
{
number[j] = number[j + ];
operat[j - ] = operat[j]; }
numberIndex--;
operatIndex--; }
else { i++; } } textBox2.Text = number[].ToString();
isNumber = false;
isDot = false;
isOperat = false;
isEqual = true;
numberIndex = ;
operatIndex = ;
} }
private void btncle_Click(object sender, EventArgs e)
{
isNumber = false;
isDot = false;
isOperat = false;
isEqual = false; numberIndex = ;
operatIndex = ; dotCount = ; textBox1.Text = "";
textBox2.Text = ""; } private void btnleft_Click(object sender, EventArgs e)
{ } private void btnright_Click(object sender, EventArgs e)
{ }
}
}
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