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();