public class PC {
CPU cpu;//定义cpu为CPU类型
HardDisk HD;
public void setCPU(CPU c){
cpu=c;
}
public void setHardDisk(HardDisk h){
HD=h;
}
public void show() {
System.out.println("cpu的速度:"+cpu.getSpeed()+"硬盘的容量:"+HD.getAmount());
}
}