抽象工厂模式
抽象工厂模式是对简单工厂模式的封装
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace SimpleFactory { public class Operation { public double NumberA { get; set; } public double NumberB { get; set; } public virtual double GetResult() { double result = 0; return result; } } public class OperationAdd : Operation { public override double GetResult() { double result = 0; result = NumberA + NumberB; return result; } } public class OperationSub : Operation { public override double GetResult() { double result = 0; result = NumberA - NumberB; return result; } } public class OperationMultiplication : Operation { public override double GetResult() { double result = 0; result = NumberA * NumberB; return result; } } public class OperationDivision : Operation { public override double GetResult() { if(NumberB==0) { throw new Exception("除数不能为0!!!记住啦"); } else { double result = 0; result = NumberA / NumberB; return result; } } } public class OperationFactory { public static Operation CreateOperate(string operate) { Operation oper = null; switch (operate) { case "+": oper=new OperationAdd(); break; case "-": oper = new OperationSub(); break; case "*": oper=new OperationMultiplication(); break; case "/": oper = new OperationDivision(); break; } return oper; } } class Program { static void Main(string[] args) { Console.WriteLine("请输入第一个数字:"); double numberA = double.Parse(Console.ReadLine()); Console.WriteLine("请输入操作符:"); string opera = Console.ReadLine(); Console.WriteLine("请输入第二个数字"); double numberB=double.Parse(Console.ReadLine()); Operation oper = new Operation(); oper = OperationFactory.CreateOperate(opera); oper.NumberA = numberA; oper.NumberB = numberB; double result = oper.GetResult(); Console.WriteLine(result.ToString()); Console.ReadKey(); } } }