#include <iostream>
using namespace std;

class Reciever {
public:
 void Action() {
 cout << "Reciever::Action..." << endl;
 }
};

class Command {
public:
 virtual ~Command() { }
 virtual void Excute() = 0;
};

class ConcreteCommand :public Command {
public:
 ConcreteCommand(Reciever *rev) {
 _rev = rev;
 }

 void Excute() {
 _rev->Action();
 }
private:
 Reciever *_rev;
};

class Invoker {
public:
 Invoker(Command* cmd) {
 _cmd = cmd;
 }
 void Invoke() {
 _cmd->Excute();
 }

private:
 Command *_cmd;
};

int main() {
 Reciever *rev = new Reciever();
 Command* cmd = new ConcreteCommand(rev);
 Invoker *inv = new Invoker(cmd);
 inv->Invoke();

 delete rev;
 delete cmd;
 delete inv;

 return 0;
}