大话设计模式15-职责链模式-2021-1-12

//15.职责链条模式
enum REQUEST_TYPE
{
	REQUEST_ASK_FOR_LEAVE=0,
	REQUEST_ADD_SALARY
};
typedef struct _request
{
	string text;
	REQUEST_TYPE type;
	int num;     //天数或者薪水
}Request;

class Manager
{
public:
	Manager(string istrName) :m_strName(istrName){};
	void setSuperior(Manager *ipSuperior)
	{
		m_pSuperior = ipSuperior;
	}
	virtual void processRequest(Request iRequest) = 0;
protected:
	Manager *m_pSuperior;  //上级
	string m_strName;
};
class CommonManager :public Manager
{
public:
	CommonManager(string istrName) :Manager(istrName){};
	void processRequest(Request iRequest) override
	{
		if (iRequest.type==REQUEST_ASK_FOR_LEAVE&&iRequest.num<=2)
		{
			cout << m_strName << "批准" << iRequest.text << iRequest.num << endl;
		}
		else
		{
			if (m_pSuperior)
			{
				m_pSuperior->processRequest(iRequest);
			}
		}
	}
};

class Majordomo :public Manager
{
public:
	Majordomo(string istrName) :Manager(istrName){};
	void processRequest(Request iRequest) override
	{
		if (iRequest.type == REQUEST_ASK_FOR_LEAVE&&iRequest.num <= 5)
		{
			cout << m_strName << "批准" << iRequest.text << iRequest.num << endl;
		}
		else
		{
			if (m_pSuperior)
			{
				m_pSuperior->processRequest(iRequest);
			}
		}
	}
};

class GeneralManager :public Manager
{
public:
	GeneralManager(string istrName) :Manager(istrName){};
	void processRequest(Request iRequest) override
	{
		if (iRequest.type == REQUEST_ASK_FOR_LEAVE)
		{
			cout << m_strName << "批准" << iRequest.text << iRequest.num << endl;
		}
		else if (iRequest.type == REQUEST_ADD_SALARY&&iRequest.num <= 500)
		{
			cout << m_strName << "批准" << iRequest.text << iRequest.num << endl;
		}
		else
		{
			cout << m_strName << "暂不批准" << iRequest.text << iRequest.num << endl;
		}
	}
};
int main()
{
	Request request;
	request.text = "小宋请假";
	request.type = REQUEST_ASK_FOR_LEAVE;
	request.num = 30;
	CommonManager *pCommonManager = new CommonManager("www");
	Majordomo *pMajordomo = new Majordomo("yyy");
	GeneralManager *pGeneralManager = new GeneralManager("lll");
	pCommonManager->setSuperior(pMajordomo);
	pMajordomo->setSuperior(pGeneralManager);
	pCommonManager->processRequest(request);
	delete pCommonManager;
	delete pMajordomo;
	delete pGeneralManager;
	system("pause");
}