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
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