LinuxC/C++編程基礎(34) 虛函數編程執行個體

一.執行個體1，如下：

#include <iostream>
#include <string>
class Startable;
class StartableProcess{
public:
StartableProcess(Startable& _startable):startable(_startable){
std::cout<<"Construct StartableProcess"<<std::endl;
}
void run();
private:
Startable& startable;
};
class  Startable{
public:
Startable():_process(*this){
std::cout<<"Construct Startable"<<std::endl;
}
void start(){
std::cout<<"Startable::start()"<<std::endl;
_process.run();
}
virtual void prerun(){
std::cout<<"Startable::prerun()"<<std::endl;
run();
}
virtual void run() = 0;
private:
StartableProcess_process;
};
class RTMFPServer:public Startable{
public:
RTMFPServer(){
std::cout<<"Construct RTMFPServer"<<std::endl;
}
void start(){
std::cout<<"RTMFPServer::start()"<<std::endl;
Startable::start();
}
void run(){
std::cout<<"RTMFPServer::run()"<<std::endl;
handle();
}
virtual void handle();
};
class Server:public RTMFPServer{
public:
void handle(){
std::cout<<"Server::handle()"<<std::endl;
}
};
inline void Startable::run(){
std::cout<<"Startable::run()"<<std::endl;
prerun();
}
inline void StartableProcess::run(){
std::cout<<"StartableProcess::run()"<<std::endl;
startable.prerun();
}
inline void RTMFPServer::handle(){
std::cout<<"RTMFPServer::handle()"<<std::endl;

}

int main(int argc,char** argv){
Server server;
server.start();
return 0;
}

二.執行個體2，如下：

#include <iostream>
#include <string>

class RTMFPManager;
class RTMFPServer{
public:
 RTMFPServer(int cores){
  std::cout<<"Construct RTMFPServer,cores="<<cores<<std::endl;
 }
 void start(){
  std::cout<<"RTMFPServer::start()"<<std::endl;
  run();
 }
 void run();
 virtual void manage(){
  std::cout<<"RTMFPManager::manage()"<<std::endl;
 }
};
class RTMFPManager{
public:
 RTMFPManager(RTMFPServer& server):_server(server){
  std::cout<<"Construct RTMFPManager"<<std::endl;
  handle();
 }
private:
 void handle() {
  std::cout<<"RTMFPManager::handle()"<<std::endl;
  _server.manage();
 }
 RTMFPServer& _server;
};
class LinyanwenServer:public RTMFPServer{
public:
 LinyanwenServer(int cores):RTMFPServer(cores){

 }
 virtual void manage(){
  std::cout<<"LinyanwenServer::manage()"<<std::endl;
 }
};
void RTMFPServer::run(){
 std::cout<<"RTMFPServer::run()"<<std::endl;
 RTMFPManager manager(*this);
}

int main()
{
 int core = 99;
 LinyanwenServer server(core);
 server.start();
 return 0;
}

 

轉載請註明出處：山水間部落格，http://blog.csdn.net/linyanwen99/article/details/8567685