责任链模式(大话设计模式)C/C++版本

责任链模式

C++

#include 
#include 
using namespace std;
// 请求类
struct Request
{
    std::string requestType;    // 请求类型
    int number;                 // 该请求类型的数量
    std::string requestContent; // 请求内容
};
// 抽象经理类
class Manager
{
private:
    std::string name;
    std::shared_ptr superior; // 管理者的上级
public:
    Manager(const std::string &strName) : name(strName) {}
    void SetSuperior(std::shared_ptr smartSuperior) // 设置管理者的上级
    {
        superior = smartSuperior;
    }
    std::shared_ptr GetSuperior() const
    {
        return superior;
    }
    const std::string &GetName() const
    {
        return name;
    }
    virtual void RequestApplications(const Request &request) = 0;
};
// 经理   经理所能有的权限就是可批准下属两天内的假期
class CommonManager : public Manager
{
public:
    CommonManager(const std::string &strName) : Manager(strName) {}
    virtual void RequestApplications(const Request &request)
    {
        if (request.requestType == "请假" && request.number 
            std::cout 
            std::shared_ptr
                superior-RequestApplications(request);
            }
        }
    }
};
// 总监类      总监所能有的权限就是可批准下属一周内的假期
class Majordomo : public Manager
{
public:
    Majordomo(const std::string &strName) : Manager(strName) {}
    virtual void RequestApplications(const Request &request)
    {
        if (request.requestType == "请假" && request.number 
            std::cout 
            std::shared_ptr
                superior-RequestApplications(request);
            }
        }
    }
};
// 总经理类
class GeneralManager : public Manager
{
public:
    GeneralManager(const std::string &strName) : Manager(strName) {}
    virtual void RequestApplications(const Request &request)
    {
        if (request.requestType == "请假" ||
            (request.requestType == "加薪" && request.number 
            std::cout 
            std::cout 
            std::cout 
    std::shared_ptr
    int days; // 请假天数
} Request;
typedef struct Manager
{
    char *name;
    struct Manager *superior;
    void (*handleRequest)(struct Manager *self, Request *req);
} Manager;
void commonManagerHandleRequest(Manager *self, Request *req);
void majordomoHandleRequest(Manager *self, Request *req);
void generalManagerHandleRequest(Manager *self, Request *req);
void commonManagerHandleRequest(Manager *self, Request *req)
{
    if (req-days 
        printf("%s:%s 数量 %d 被批准！\n", self-name, "小菜申请请假", req-days);
    }
    else if (self-superior)
    {
        self-superior-handleRequest(self-superior, req);
    }
}
void majordomoHandleRequest(Manager *self, Request *req)
{
    if (req-days 
        printf("%s:%s 数量 %d 被批准！\n", self-name, "小菜申请请假", req-days);
    }
    else if (self-superior)
    {
        self-superior-handleRequest(self-superior, req);
    }
}
void generalManagerHandleRequest(Manager *self, Request *req)
{
    if (req-days 
        printf("%s:%s 数量 %d 被批准！\n", self-name, "小菜申请请假", req-days);
    }
    else
    {
        printf("%s:%s 数量 %d 被拒绝！\n", self-name, "小菜申请请假", req-days);
    }
}
Manager *createManager(char *name, void (*handleRequest)(Manager *, Request *))
{
    Manager *manager = malloc(sizeof(Manager));
    manager-name = name;
    manager-handleRequest = handleRequest;
    manager-superior = NULL;
    return manager;
}
void setSuperior(Manager *manager, Manager *superior)
{
    manager-superior = superior;
}
void freeManager(Manager *manager)
{
    free(manager);
}
int main()
{
    Manager *manager = createManager("经理", commonManagerHandleRequest);
    Manager *major = createManager("总监", majordomoHandleRequest);
    Manager *generalManager = createManager("总经理", generalManagerHandleRequest);
    setSuperior(manager, major);
    setSuperior(major, generalManager);
    Request request;
    printf("员工申请请假结果：\n");
    request.days = 1;
    manager-handleRequest(manager, &request);
    printf("\n员工申请请假结果：\n");
    request.days = 4;
    manager-handleRequest(manager, &request);
    printf("\n员工申请请假结果：\n");
    request.days = 10;
    manager-handleRequest(manager, &request);
    freeManager(manager);
    freeManager(major);
    freeManager(generalManager);
    return 0;
}