第C#實現簡單的計算器小程序作為一個程序員，如何從淺入深的訓練自己的技術，可以通過一些小程序來訓練

下面簡單介紹一下如何制作一個簡單的計算器小程序

如下為制作之后的小程序截圖

代碼段其中計算用了dataTable的一個函數

dt.Compute(CurStr,string.Empty)

usingSystem;

usingSystem.Collections.Generic;

usingSystem.ComponentModel;

usingSystem.Data;

usingSystem.Drawing;

usingSystem.Linq;

usingSystem.Text;

usingSystem.Threading.Tasks;

usingSystem.Windows.Forms;

namespaceCalculate

publicpartialclassCalculateFrom:Form

{

publicCalculateFrom()

{

InitializeComponent();

}

privatestringFhStr=string.Empty;

privatestringCurStr=string.Empty;//計算字符串

//等于的等于按鈕處理

privatevoidClick_DENG_Click(objectsender,EventArgse)

{

DataTabledt=newDataTable();

if(string.IsNullOrEmpty(CurStr))

{

return;

}

ListstringKeyList=newListstring{"+","-","*","/"};

if(KeyList.Contains(CurStr.Substring(CurStr.Length-1)))//判斷最后一位為四則運算符，則去掉

{

CurStr=CurStr.Substring(CurStr.Length-1);

}

if(string.IsNullOrEmpty(CurStr))//若此時為空則賦值計算結果零值

{

this.Text_JM.Text="0";

return;

}

else

{

CurStr=Convert.ToString(dt.Compute(CurStr,string.Empty));//若滿足條件則計算使用DataTable的計算形式

this.Text_JM.Text=CurStr;//計算結果賦值給Text

}

}

//數值加入//里面包含數據只計算

privatevoidValueClick(stringClickV)

{

//進行判斷，判斷點擊的是否是非空數值或者小數位數

if(!string.IsNullOrEmpty(ClickV))

{

if(ClickV=="."string.IsNullOrEmpty(CurStr))//第一位為小數位數

{

CurStr="0.";//如果首先點擊了小數位數自動在前面增加零值

}

elseif(ClickV==".")//如果已經存在小數位數，不可以再輸入

{

if(!CurStr.Contains("."))

{

CurStr=CurStr+".";

}

}

elseCurStr=CurStr+ClickV;

this.Text_JM.Text=CurStr;//把字符串復制給前臺顯示的text中

}

}

//四則運算符號處理

privatevoidValueCalculate(stringKey)

{

if(string.IsNullOrEmpty(CurStr))

{

return;

}

if(CurStr.Substring(CurStr.Length-1,1)==".")

{

CurStr=CurStr+"0";//若是最后一位為小數自動后面補齊一個零值

}

ListstringKeyList=newListstring{"+","-","*","/"};

if(KeyList.Contains(CurStr.Substring(CurStr.Length-1,1)))//若最后一位已經是四則運算符號，則不再操作

{

return;//最后一位目前已經是符號

}

CurStr=CurStr+Key;

this.Text_JM.Text=CurStr;

}

#region數值

privatevoidClick_1_Click(objectsender,EventArgse)

{

ValueClick("1");

}

privatevoidClick_2_Click(objectsender,EventArgse)

{

ValueClick("2");

}

privatevoidClick_3_Click(objectsender,EventArgse)

{

ValueClick("3");

}

privatevoidClick_4_Click(objectsender,EventArgse)

{

ValueClick("4");

}

privatevoidClick_5_Click(objectsender,EventArgse)

{

ValueClick("5");

}

privatevoidClick_6_Click(objectsender,EventArgse)

{

ValueClick("6");

}

privatevoidClick_7_Click(objectsender,EventArgse)

{

ValueClick("7");

}

privatevoidClick_8_Click(objectsender,EventArgse)

{

ValueClick("8");

}

privatevoidClick_9_Click(objectsender,EventArgse)

{

ValueClick("9");

}

privatevoidClick_0_Click(objectsender,EventArgse)

{

ValueClick("0");

}

//小數點

privatevoidClick_C_Click(objectsender,EventArgse)

{

ValueClick(".");

}

#endregion

#region加減乘除

privatevoidClick_A_Click(objectsender,EventArgse)

{

ValueCalculate("+");

}

privatevoidClick_R_Click(objectsender,EventArgse)

{

ValueCalculate("-");

}

privatevoidClick_X_Click(objectsender,EventArgse