第四章作业

用类描述计算机CPU的速度和硬盘的容量

class PC{CPU cpu;HardDisk HD;void setCPU(CPU c){cpu=c;};void setHardDisk(HardDisk h){HD=h;};void show(){System.out.println("cpu的速度是："+cpu.getSpeed());System.out.println("硬盘的容量是："+HD.getAmount());};}class CPU{int speed;void setSpeed(int s){speed=s;};int getSpeed(){return speed;};}class HardDisk{int amount;void setAmount(int m){amount=m;};int getAmount(){return amount;};}public class Test{public static void main(String []args){CPU cpu=new CPU();cpu.setSpeed(2200);HardDisk disk=new HardDisk();disk.setAmount(200);PC pc=new PC();pc.setCPU(cpu);pc.setHardDisk(disk);pc.show();}}