跪求大神解答

Question

package com.chen1;

 

import java.util.Scanner;

 

public class Demo2 {

         

    public static void main(String[] args) {

    //创建可租车列表

    Car[] carsForRent={new PassengerCar("奥迪A4",500,4),new PassengerCar("马自达6",400,4),

    new PassengerCar("金龙",800,20),new Pickup("皮卡雪",450,2,4),

    new Trunk("松花江",400,4),new Trunk("大阿肥",1000,20)};

    System.out.println("欢迎使用达达租车系统");

    System.out.println("您是否需要租车：1 是 \t其他任意键 否");

  //获取并保存输入的值（一或者其他任意键）

    Scanner scan=new Scanner(System.in);

   String input=scan.next();

  //判断是否进入租车系统

   if(input.equals("1")){

  System.out.println("你可租车类型及价目表");

  System.out.println("序号\t汽车名称\t租金                 \t   容量");

  int i=0;

  for(Car currentCar:carsForRent){

//用instancreof判断是否属于汽车子类

 if(currentCar instanceof PassengerCar){

 i++;

 System.out.println(""+i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()+"元/天\t"+((PassengerCar)currentCar).getpeopleCapacity()+"人\t"

  );}

 if(currentCar instanceof Trunk){

 i++;

 System.out.println(""+i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()+"元/天\t"+((Trunk)currentCar).getcargoCapacity()+"吨\t");}

 if(currentCar instanceof Pickup){

 i++;

 System.out.println(""+i+"\t"+currentCar.getName()+"\t"+currentCar.getRent()+"元/天\t"+((Pickup)currentCar).getCargoCapacity()+"吨\t"

  +((Pickup)currentCar).getPeopleCapacity()+"人\t");}

  }

  

  System.out.println("请输入您要租车的数量：");

  //获取并保存输入的值（租车的数量）

  Scanner inputnum=new Scanner(System.in);

 int number=inputnum.nextInt();

// 输入每辆租车的序号

for(int j=1;j<=number;j++){

System.out.println("请输入第"+j+"台车的序号：");

Scanner inputnum1=new Scanner(System.in);

int number1=inputnum1.nextInt();

}

//输入租车天数

System.out.println("请输入租车天数：");

Scanner inputnum2=new Scanner(System.in);

int days=inputnum2.nextInt();

//租车账单

System.out.println("您的账单：");

double total=0;

Car car=new PassengerCar();

total=car.getRent()*days;

  System.out.println("***租车总价格:"+total);

 }

   

   else {

  System.out.println("您已退出达达租车系统!");

   }

  

   

   

    

    }

    }

 

//汽车类

class Car{

//成员属性

String name;

 double carCapacity;

 double rent;

 //获取名字

public String getName() {

return name;

}

//设定名字

public void setName(String name) {

this.name = name;

}

//获取汽车容量

public double getCarCapacity() {

return carCapacity;

}

//设定汽车容量

public void setCarCapacity(double carCapacity) {

this.carCapacity = carCapacity;

}

//获取租金

public double getRent() {

return rent;

}

//设定租金

public void setRent(double rent) {

this.rent = rent;

}

}

//子类卡车继承父类汽车

class Trunk extends Car{

//卡车容量属性封装

    private double cargoCapacity;

//  构造方法  ，自动调用构造方法完成对新对象的初始化

public Trunk(String name,double rent,double cargoCapacity){

this.name=name;

this.rent=rent;

this.cargoCapacity=cargoCapacity;

}

//获取卡车载货容量

public double getcargoCapacity(){

return cargoCapacity;

}

}

//子类客车继承父类汽车

class PassengerCar extends Car{

//客车载入容量属性封装

private double peopleCapacity;

//构造方法，完成对新对象的属性初始化

public PassengerCar(String name,double rent,double peopleCapacity){

this.name=name;

this.rent=rent;

this.peopleCapacity=peopleCapacity;

} 

//获取客车载入的容量

public double getpeopleCapacity(){

return peopleCapacity;

}

}

//子类

class Pickup extends Car{

private double cargoCapacity;

private double peopleCapacity;

public Pickup(String name,double rent,double cargoCapacity,double peopleCapacity){

this.name=name;

this.rent=rent;

this.cargoCapacity=cargoCapacity;

this.peopleCapacity=peopleCapacity;

}

public double getCargoCapacity() {

return cargoCapacity;

}

public double getPeopleCapacity() {

return peopleCapacity;

}

}

Answer 1

就后面这个写不出来

Answer 2

效果是这个