command模式

不同的命令产生不同的结果，由invoke发放命令

command.h

#ifndef _COMMAND_H

#define _COMMAND_H

#include <iostream>

using namespace std;

class Receiver

{

public:

Receiver() {

}

~Receiver() {

}

void Cmd1() {

cout << "cmd1" << endl;

}

void Cmd2() {

cout << "cmd2" << endl;

}

};

class Command

{

public:

virtual ~Command() {

}

virtual void Excute()=0;

protected:

Command() {

}

};

class ConcreteCommand1 : public Command

{

public:

ConcreteCommand1() {

rece_ = new Receiver;

}

void Excute() {

rece_->Cmd1();

}

private:

Receiver* rece_;

};

class ConcreteCommand2 : public Command

{

public:

ConcreteCommand2() {

rece_ = new Receiver;

}

void Excute() {

rece_->Cmd2();

}

private:

Receiver* rece_;

};

class Invoker

{

public:

Invoker(Command* cmd) : _cmd(cmd) {

}

~Invoker() {

}

void invoke() {

_cmd->Excute();

}

private:

Command* _cmd;

};

#endif // _COMMAND_H

command.cpp

#include "command.h"

int main()

{

Command* cmd = new ConcreteCommand1;

Invoker* invoker1 = new Invoker(cmd);

invoker1->invoke();

return 0;

}

编译:make command