责任链模式

#include<iostream>
#include<string>
using namespace std;

class Request
{
public:
string requestType;
string requestContent;
int number;
};

class Manager
{
protected:
string name;
Manager *superior;
public:
Manager(string name)
{
this->name = name;
}
void setSuperior(Manager *superior)
{
this->superior = superior;
}
virtual void requestApplications(Request *request) = 0;
};

class CommonManager : public Manager
{
public:
CommonManager(string name) : Manager(name)
{}
void requestApplications(Request *request)
{
if (request->requestType == "请假" && request->number <= 2)
{
cout << name << " " << request->requestContent << " 请假天数: " << request->number << " 被批准" << endl;
}
else
{
if (superior != NULL)
{
superior->requestApplications(request);
}
}
}
};

class Majordomo : public Manager
{
public:
Majordomo(string name) : Manager(name)
{}
void requestApplications(Request *request)
{
if (request->requestType == "请假" && request->number <= 5)
{
cout << name << " " << request->requestContent << " 请假天数: " << request->number << " 被批准" << endl;
}
else
{
if (superior != NULL)
{
superior->requestApplications(request);
}
}
}
};

class GeneralManager : public Manager
{
public:
GeneralManager(string name) : Manager(name)
{}
void requestApplications(Request *request)
{
if (request->requestType == "请假")
{
cout << name << " " << request->requestContent << " 请假天数: " << request->number << " 被批准" << endl;
}
}
};

int main()
{
CommonManager *jingli = new CommonManager("经理");
Majordomo *zongjian = new Majordomo("总监");
GeneralManager *zongjingli = new GeneralManager("总经理");

jingli->setSuperior(zongjian);
zongjian->setSuperior(zongjingli);

Request *request = new Request();

request->requestType = "请假";
request->requestContent = "李俊宏请假";
request->number = 1;
jingli->requestApplications(request);

request->requestType = "请假";
request->requestContent = "李俊宏请假";
request->number = 4;
jingli->requestApplications(request);

request->requestType = "请假";
request->requestContent = "李俊宏请假";
request->number = 10;
jingli->requestApplications(request);

return 0;
}
//Result:
/*
经理 李俊宏请假 请假天数: 1 被批准
总监 李俊宏请假 请假天数: 4 被批准
总经理 李俊宏请假 请假天数: 10 被批准
*/