(深入.Net平台和C#编程)第六章上机练习4.李向阳.20170411

 1 ==============加法类================
 2 using System;
 3 using System.Collections.Generic;
 4 using System.Linq;
 5 using System.Text;
 6 using System.Threading.Tasks;
 7 
 8 namespace Sj4.Entity
 9 {
10     /// <summary>
11     /// 加法
12     /// </summary>
13     public class Jiafa : Operation
14     {
15         //计算方法
16         public override double GetResult()
17         {
18             if (NumberB == 0)
19             {
20                 throw new Exception("不能为0");
21             }
22             double result = NumberA + NumberB;
23             return result;
24         }
25     }
26 }

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