C#實(shí)現(xiàn)簡單的計(jì)算器小程序

第C#實(shí)現(xiàn)簡單的計(jì)算器小程序作為一個程序員，如何從淺入深的訓(xùn)練自己的技術(shù)，可以通過一些小程序來訓(xùn)練

下面簡單介紹一下如何制作一個簡單的計(jì)算器小程序

如下為制作之后的小程序截圖

代碼段其中計(jì)算用了dataTable的一個函數(shù)

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(jì)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(yùn)算符，則去掉

{

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

}

if(string.IsNullOrEmpty(CurStr))//若此時為空則賦值計(jì)算結(jié)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(jì)算使用DataTable的計(jì)算形式

this.Text_JM.Text=CurStr;//計(jì)算結(jié)果賦值給Text

}

}

//數(shù)值加入//里面包含數(shù)據(jù)只計(jì)算

privatevoidValueClick(stringClickV)

{

//進(jìn)行判斷，判斷點(diǎn)擊的是否是非空數(shù)值或者小數(shù)位數(shù)

if(!string.IsNullOrEmpty(ClickV))

{

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

{

CurStr="0.";//如果首先點(diǎn)擊了小數(shù)位數(shù)自動在前面增加零值

}

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

{

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

{

CurStr=CurStr+".";

}

}

elseCurStr=CurStr+ClickV;

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

}

}

//四則運(yùn)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(shù)自動后面補(bǔ)齊一個零值

}

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

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

{

return;//最后一位目前已經(jīng)是符號

}

CurStr=CurStr+Key;

this.Text_JM.Text=CurStr;

}

#region數(shù)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(shù)點(diǎn)

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