每日一模式之外观模式

//外观模式：对外隐藏行为，只呈现效果
//电脑
class Computer{
	public $io,$cpu,$display,$memory,$disk;
	public function work(){
		$this->io->flow();
		$this->cpu->compute();
		$this->display->show();
		$this->memory->mReadWrite();
		$this->disk->dReadWrite();
	}
}


class Io{
	public function flow(){
		echo "Io 流动\n";
	}

}

class Cpu{
	public function compute(){
		echo "cpu 工作\n";
	}
}

class Display{
	public function show(){
		echo "显示器工作\n";
	}
}
class  Memory{
	public function mReadWrite(){
		echo "内存\n";
	}
}
class Disk{
	public function dReadWrite(){
		echo "磁盘工作\n";
	}
}

$obj_computer = new Computer();
$obj_computer->io = new Io();
$obj_computer->cpu = new Cpu();
$obj_computer->display = new Display();
$obj_computer->memory = new Memory();
$obj_computer->disk = new Disk();
$obj_computer->work();