C++策略模式

代码实现：

#include<iostream>
using namespace std;
//策略基类
class COperation
{
public:
	int m_nFirst;
	int m_nSecond;
	virtual double GerResult()
	{
		double dResult=0;
		return dResult;
	}
};
//策略具体类-加法类
class AddOperation:public COperation
{
public:
	AddOperation(int a,int b)
	{
		m_nFirst=a;
		m_nSecond=b;
	}
	virtual double GetResult()
	{
		return m_nFirst+m_nSecond;
	}
};

class Context
{
private:
	COperation* op;
public:
	Context(char cType)
	{
		switch(cType)
		{
			case'+':
				op=new AddOperation(3,8);
				break;
			default:
				op=new AddOperation();
				break;
		}
	}
	double GetResult()
	{
		return op->GerResult();
	}
};
//客户端
int main()
{
	int a,b;
	char c;
	cout<<"输入操作数吧，中间空格间隔："<<endl;
	cin>>a>>b;
	Context* test=new Context('+');
	cout<<test->GerResult()<<endl;
	
	return 0;
}

C++策略模式

原文：http://blog.csdn.net/u011421608/article/details/38873323