接口

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace susuusu{    interface Interface1    {        int calculate(int a, int b,int c);    }}

 加法类

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace susuusu{    class Add:Interface1    {        public int calculate(int a, int b,int c)        {            return a + b + c;        }    }}

 减法类

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace susuusu{    class Subtract:Interface1    {       public int calculate(int a, int b, int c)        {            return a - b - c;        }    }}

 乘法类

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace susuusu{    class Multiply:Interface1    {       public int calculate(int a, int b, int c)        {            return a * b * c;        }    }}

 除法类

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace susuusu{    class Except:Interface1    {       public int calculate(int a, int b, int c)        {            return a / b / c;        }    }}

 环境角色

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace susuusu{    class Environment    {        private Interface1 inter;        public Environment(Interface1 face)        {            inter = face;        }        public Interface1 gewrt()        {            return inter;        }        public void setwrt(Interface1 face)        {            inter = face;        }        public int calculate(int a, int b,int c)        {            return inter.calculate(a, b,c);        }    }}

 Main方法

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace susuusu{    class Program    {        static void Main(string[] args)        {            Add addss = new Add();            Environment environment = new Environment(addss);           Console.WriteLine( environment.calculate(4, 5,7));           Subtract subtrss = new Subtract();           Environment environment1 = new Environment(subtrss);           Console.WriteLine(environment1.calculate(911, 81, 2));           Multiply mulit = new Multiply();           Environment environment2 = new Environment(mulit);           Console.WriteLine(environment2.calculate(12, 45, 12));           Except except1 = new Except();           Environment environment3 = new Environment(except1);           Console.WriteLine(environment3.calculate(81, 9, 9));           Console.ReadLine();        }    }}

 总结

总的感觉来书还是控制台比较好写一些！在不同的环境下写相同的程序，感受一下不同！