大话设计模式之简单工厂模式代码

简单工厂模式解析

最新推荐文章于 2021-12-07 20:43:01 发布

最新推荐文章于 2021-12-07 20:43:01 发布 · 82 阅读

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#设计模式

本文介绍了一个简单的工厂模式实现，通过创建不同的操作类来执行加、减、乘、除等基本数学运算。工厂类根据传入的操作符创建相应的操作对象。

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

namespace 简单工厂模式
{
//operation 运算类
public class operation
{
private double _numberA = 0;
private double _numberB = 0;
public double NumberA
{
get { return _numberA; }
set { _numberA = value; }
}
public double NumberB
{
get { return _numberB; }
set { _numberB = value; }
}
public virtual double GetResult()
{
double result = 0;
return result;
}
}
class OperationAdd : operation
{
public override double GetResult()
{
double result = 0;
result = NumberA + NumberB;
return result;
}
}
class OperationSub : operation
{
public override double GetResult()
{
double result = 0;
result = NumberA - NumberB;
return result;
}
}
class OperationMul : operation
{
public override double GetResult()
{
double result = 0;
result = NumberA * NumberB;
return result;
}
}
class OperationDiv : operation
{
public override double GetResult()
{
double result = 0;
if (NumberB != 0)
{
result = NumberA / NumberB;
return result;
}
else
{
throw new Exception("除数不能为0。");
}
}
}
//简单运算工厂类
public class OperationFactory
{
public static operation createOperation(string operate)
{
operation oper = null;
switch (operate)
{
case "+":
oper=new OperationAdd();
break;
case "-":
oper=new OperationSub();
break;
case "*":
oper=new OperationMul();
break;
case "/":
oper=new OperationDiv();
break;
}
return oper;
}

}

class Program
{
static void Main(string[] args)
{
operation oper;
oper = OperationFactory.createOperation("/");
oper.NumberA = 23;
oper.NumberB = 1;
double result = oper.GetResult();
}
}
}