2回答

• 

  沐雨凉笙

  2019-07-05 22:06:35

  括号里的（Qiche）是类型强转，o是他用for in遍历car数组里面的元素，getrom就是获取吨数的方法咯

  0 0
• 

  慕瓜0408972

  2019-07-05 21:25:42

  父类

  public class Car {
   protected int xuhao;
   protected String name;
   protected int money;
   public Car(int xuhao,String name,int money)
   {
    this.xuhao=xuhao;
    this.name=name;
    this.money=money;
    
   }

   public void leixing() {
    
    System.out.println(xuhao+"\t"+name+"\t"+money+"元/天");
   }
  }
  

  货车类
  

  public class Huoche extends Car {
   private int rom;
   public Huoche(int xuhao,String name,int money,int rom)
   {
    super(xuhao,name,money);
    
    this.rom=rom; 
   }
   public void leixing(){
    
    System.out.println(xuhao+"\t"+name+"\t"+money+"元/天"+"\t"+"载货"+rom+"吨");
   }
  public int getrom(){
    
    return rom;
   }
  }
  

  汽车类

  public class Qiche extends Car {
   private int ram;
   public Qiche(int xuhao,String name,int money,int ram)
   {
    super(xuhao,name,money);
   
    this.ram=ram; 
   }
   public void leixing(){
    
    System.out.println(xuhao+"\t"+name+"\t"+money+"元/天"+"\t"+"载人"+ram+"人");
   }
  public int getram(){
    
    return ram;
   }

  皮卡类
  }

  public class Pika extends Car {
   private int ram;
   private int rom;
   public Pika(int xuhao,String name,int money,int ram,int rom)
   {
    super(xuhao,name,money);
    this.ram=ram; 
          this.rom=rom;
   }
   public void leixing(){
    
    System.out.println(xuhao+"\t"+name+"\t"+money+"元/天"+"\t"+"载人"+ram+"载货"+rom+"吨");
   }
  public int getram(){
    
    return ram;
   }
  public int getrom(){
   
   return rom;
  }
  }

  主类
  

  import java.util.Scanner;

  public class Main {

   public static void main(String[] args) {
    
    Main kehu = new Main();
    Car[]  xinghao = new Car[6];
    xinghao[0] =new Qiche(1,"奥迪A4",500,4);
    xinghao[1] =new Qiche(2,"马自达6",400,4);
    xinghao[2] =new Pika(3,"皮卡雪6",450,4,2);
    xinghao[3] =new Qiche(4,"金龙",800,20);
    xinghao[4] =new Huoche(5,"松花江",400,4);
    xinghao[5] =new Huoche(6,"依维柯",1000,20);
    System.out.println("欢迎使用答答租车系统");
    System.out.println("您是否要租车:1是"+"\t"+"2否");
        Scanner in =new Scanner(System.in);
        int i = in.nextInt();
        if(i==1)
        {
        System.out.println("您可租车的类型及其价格表");
        System.out.println("序号"+"\t"+"汽车名称"+"\t"+"租金"+"\t"+"容量");
       xinghao[0].leixing();
       xinghao[1].leixing();
       xinghao[2].leixing();
       xinghao[3].leixing();
       xinghao[4].leixing();
       xinghao[5].leixing();
       System.out.println("请选择您要租的汽车数量");
          int j = in.nextInt();
         Car[] f = new Car[j];
        for(int s=0;s<j;s++)
        {
         System.out.println("请输入第"+(s+1)+"辆车的序号：");
         int c=in.nextInt();
         f[s]=xinghao[c-1];
        }
        System.out.println("请输入租车天数：");
        int d=in.nextInt();
        int u=0;
        System.out.println("您的账单有：");
        System.out.println("**********载人车有：");
        for(Car o:f)
        {
         if(o.xuhao==1||o.xuhao==2||o.xuhao==4)
         {
          System.out.print(o.name);
          u+=((Qiche)o).getram();
         
         }else if(o.xuhao==3)
         {
          System.out.print(o.name);
          u+=((Pika)o).getram();
       
         }
        }
        System.out.println("总载客人数"+u+"人"); 
       System.out.println("\n**********载货车有：");
        int h =0;
        for(Car y:f)
        {
         if(y.xuhao==5||y.xuhao==6)
         {
          System.out.print(y.name);
          h+=((Huoche)y).getrom();
         
         }else if(y.xuhao==3)
         {
          System.out.print(y.name);
         h+=((Pika)y).getrom();
         }
       
        }  System.out.println("总载货数"+h+"吨");
        double qian=0;
        for(Car e:f){
        qian+=e.money;
        }
        qian=qian*d;

        System.out.print("\n*****租车总金额："+qian);
   }
    else
        {
       System.out.println("欢迎下次使用");
       
        }
   }

  }

  
  

  0 0