C# 简易计算器（入门级源码，实现了平方、开方、加减乘除等算法）

基本信息

源码名称：C# 简易计算器（入门级源码，实现了平方、开方、加减乘除等算法）

源码大小：10.26M

文件格式：.zip

开发语言：C#

更新时间：2019-09-10

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源码介绍

基于VS15 的 C# .NET Framework 4.5 用于简单的加减乘除以及平方开方等计算

public partial class MyCalculator : Form
{

double a = 0;
double b = 0;
bool c = false;
string d;

public MyCalculator()
{
InitializeComponent();

}

/// <summary>
/// 窗体加载结果默认空字符
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MyCalculator_Load(object sender, EventArgs e)
{
txtResult.Text = "";
txtResult.TextAlign = HorizontalAlignment.Right;//用来设置文本框的文字的位置，居右显示
}

/// <summary>
/// 平方
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnPF_Click(object sender, EventArgs e)
{
if (txtResult.Text == "")
{
MessageBox.Show("文本框内不存在数值，不可计算平方值");
return;
}
else if (txtResult.Text == ".")
{
MessageBox.Show("文本框内数值不正确，不可计算平方值");
return;
}
else
{
c = true;
b = double.Parse(txtResult.Text);
d = "x2";
}

}

/// <summary>
/// 开方
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnKF_Click(object sender, EventArgs e)
{
if (txtResult.Text == "")
{
MessageBox.Show("文本框内不存在数值，不可计算开方值");
return;
}
else if (txtResult.Text == ".")
{
MessageBox.Show("文本框内数值不正确，不可计算开方值");
return;
}
else
{
c = true;
b = double.Parse(txtResult.Text);
d = "sqrt";
}

}

/// <summary>
/// log
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnLog_Click(object sender, EventArgs e)
{
if (txtResult.Text == "")
{
MessageBox.Show("文本框内不存在数值，不可计算 Log 值");
return;
}
else if (txtResult.Text == ".")
{
MessageBox.Show("文本框内数值不正确，不可计算 Log 值");
return;
}
else
{
c = true;
b = double.Parse(txtResult.Text);
d = "Log";
}

}

/// <summary>
/// OFF（关闭计算器）
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnOff_Click(object sender, EventArgs e)
{
if (MessageBox.Show(this, string.Format("您是真的关闭此计算机吗？", "关闭提示信息"), "关闭提示信息", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
this.Close();
}

}

/// <summary>
/// 7
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn7_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "7";

}

/// <summary>
/// 8
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn8_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "8";

}

/// <summary>
/// 9
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn9_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "9";

}

/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnJia_Click(object sender, EventArgs e)
{

c = true;
b = double.Parse(txtResult.Text);
d = " ";

}

/// <summary>
/// 4
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn4_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "4";

}

/// <summary>
/// 5
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn5_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "5";

}

/// <summary>
/// 6
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn6_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "6";

}

/// <summary>
/// -
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnJian_Click(object sender, EventArgs e)
{

c = true;
b = double.Parse(txtResult.Text);
d = "-";

}

/// <summary>
/// 1
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn1_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "1";

}

/// <summary>
/// 2
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn2_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "2";

}

/// <summary>
/// 3
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn3_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "3";

}

/// <summary>
/// *
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnCheng_Click(object sender, EventArgs e)
{

c = true;
b = double.Parse(txtResult.Text);
d = "*";

}

/// <summary>
/// 0
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn0_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}

//txtResult.Text = "0";

//if (d == "/")
//{
// txtResult.Clear();

// MessageBox.Show("除数不能为零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
//}

try
{

txtResult.Text = "0";
}
//catch (DivideByZeroException)
//{

// MessageBox.Show("除数不能为零", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
//}

catch (DivideByZeroException)
{
Console.WriteLine("除数不能为零");
}
//catch (Exception e)
//{
// Console.WriteLine(e.Message);
//}
Console.WriteLine(txtResult.ToString());

}

/// <summary>
/// 00
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btn00_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = "00";

}

/// <summary>
/// =
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnResult_Click(object sender, EventArgs e)
{

switch (d)

{

case " ": a = b double.Parse(txtResult.Text); break;

case "-": a = b - double.Parse(txtResult.Text); break;

case "*": a = b * double.Parse(txtResult.Text); break;

case "/": a = b / double.Parse(txtResult.Text); break;

case "x2": a = b * double.Parse(txtResult.Text); break;

case "sqrt": a = Math.Sqrt(b); break;

case "log": a = Math.Log(double.Parse(txtResult.Text), b); break;

case "ln": a = Math.Log(b, Math.E); break;

}

txtResult.Text = a "";

c = true;

}

/// <summary>
/// /
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnChu_Click(object sender, EventArgs e)
{

c = true;
b = double.Parse(txtResult.Text);
d = "/";

}

/// <summary>
/// .
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnDian_Click(object sender, EventArgs e)
{

if (c == true)
{
txtResult.Text = "";
c = false;
}
txtResult.Text = ".";

}

/// <summary>
/// C（清空）
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnC_Click(object sender, EventArgs e)
{

txtResult.Text = "";

}

/// <summary>
/// ln
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnLn_Click(object sender, EventArgs e)
{
if (txtResult.Text == "")
{
MessageBox.Show("文本框内不存在数值，不可计算 Ln 值");
return;
}
else if (txtResult.Text == ".")
{
MessageBox.Show("文本框内数值不正确，不可计算 Ln 值");
return;
}
else
{
c = true;
b = double.Parse(txtResult.Text);
d = "Ln";
}

}

/// <summary>
/// back
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnBack_Click(object sender, EventArgs e)
{

string msg = txtResult.Text;

if (msg.Length > 0)
{
txtResult.Text = msg.Substring(0, msg.Length - 1);//每点击一下Back按钮，后退一步（即每点击一下 Back 按钮，文本内容清空一次最后一位数值）
}
else
{
MessageBox.Show("文本框内不存在数值，不需再执行清除字符");
return;
}
}

}