using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;

namespace?_3.裝箱和拆箱
{
????class?Program
????{
????????static?void?Main（string[]?args）
????????{
????????????//------------------------------------------------
????????????//實際開發中應該盡量減少不必要的裝箱和拆箱?因為兩者存儲方式不同
????????????//轉換時會造成性能的損失和精度的損失
????????????//-------------------------------------------------
????????????//值類型?--->引用類型??裝箱
????????????//引用類型?--->值類型??拆箱
????????????//java中數據類型轉換
????????????//1.自動類型提升（轉換）?---?裝箱
????????????//double?d?=?1;?--->??d?=?1.0;
????????????//2.強制類型轉換??---??拆箱
????????????//double??+?int?=?int
????????????//（int）double?+?int?=?int
????????????
????????????//自動裝箱
????????????object?o?=?1;
????????????int?score?=?（int）o?+?1;

????????????//員工類??PM???經理類?EM
????????????
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????2456??2014-10-27?14:19??3.裝箱和拆箱\3.裝箱和拆箱\3.裝箱和拆箱.csproj

?????文件??????11600??2014-10-27?14:19??3.裝箱和拆箱\3.裝箱和拆箱\bin\Debug\3.裝箱和拆箱.vshost.exe

?????文件???????5941??2014-10-27?14:19??3.裝箱和拆箱\3.裝箱和拆箱\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件???????1060??2014-10-27?14:24??3.裝箱和拆箱\3.裝箱和拆箱\Program.cs

?????文件???????1390??2014-10-27?14:19??3.裝箱和拆箱\3.裝箱和拆箱\Properties\AssemblyInfo.cs

?????文件????????893??2014-10-27?14:19??3.裝箱和拆箱\3.裝箱和拆箱.sln

????..A..H.??????9216??2014-10-27?14:19??3.裝箱和拆箱\3.裝箱和拆箱.suo

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱\obj\x86\Debug\TempPE

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱\obj\x86\Debug

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱\bin\Debug

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱\bin\Release

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱\obj\x86

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱\bin

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱\obj

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱\Properties

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱\3.裝箱和拆箱

?????目錄??????????0??2014-10-27?16:36??3.裝箱和拆箱

-----------?---------??----------?-----??----

????????????????32556????????????????????17