1 import java.util.Scanner;
 2 
 3 public class Main {
 4     public static void main(String[] args) {
 5         Scanner sc =new Scanner(System.in);
 6         int exitflag =1; //用于终止循环
 7         do {
 8             System.out.println("欢迎使用达达租车系统：");
 9             System.out.println("请问是否要租车：1、是 2、否");
10             String choose =sc.next();
11             switch (choose){
12                 case "1":
13                     Function.AllStep();
14                     exitflag =0;
15                     break;
16                 case "2":
17                     System.out.println("用户不需要租车,已成功退出！");
18                     exitflag =0;
19                     break;
20                 default:
21                     System.out.println("输入有误，请重新输入！");
22                     break;
23             }
24         }while (exitflag == 1);
25 
26 
27     }
28 }

 1 import java.util.Scanner;
 2 
 3 public class Function {
 4     public  static Scanner sc = new Scanner(System.in);
 5     public static void AllStep(){
 6         //生成车辆数组
 7         AllCar[]  cars = {new Truck(1,"松花江",400,4,2),
 8                 new Truck(2,"依维柯",1000,20,2),
 9                 new PickUpTruck(3,"皮卡雪6",450,4,2,1),
10                 new Car(4,"奥迪A4",500,4,0),
11                 new Car(5,"马自达6",400,4,0),
12                 new Car(6,"金龙   ",800,50,0)};
13         System.out.printf("%-4s %-10s %-10s %-10s ","序号","汽车名称","租金","容量");
14         System.out.println();
15 //        显示车辆所有的信息
16         for (int i = 0; i <cars.length ; i++) {
17             cars[i].print();
18             System.out.println();
19         }
20 //      进入租车流程
21         System.out.println("请输入您要租的汽车数量：");
22         int carAmount =sc.nextInt();
23         int[] carNum =  new int[carAmount]; //用于存储租出的车辆序号
24         for (int i = 1; i <=carAmount ; i++) {
25             System.out.println("请输入第"+i+"辆车序号：");
26             carNum[i-1] = sc.nextInt();
27         }
28         System.out.println("请输入租车天数：");
29         int day = sc.nextInt();
30         System.out.println("您的账单：");
31         System.out.println("***可载人的车有：");
32         int peopeleNum =list(carNum,cars,0);
33         System.out.println("共可以载："+peopeleNum+"人");
34         System.out.println("***可载货的车有：");
35         int loadNum =list(carNum,cars,2);
36         System.out.println("共可以载："+loadNum+"吨");
37 //        计算总的租车费用
38         int sumMoney=0;
39         for (int i = 0; i <carNum.length ; i++) {
40             sumMoney +=cars[carNum[i]-1].carPrice*day;
41         }
42         System.out.println("***租车总价格："+sumMoney+"元");
43     }
44     public static int list(int[] carNum, AllCar[] cars,int state){
45         int sumNum=0;
46         int carFlag=1; //用于判断车名是否重复
47         for (int i = 0; i <carNum.length ; i++) {
48             carFlag=1;
49             if( cars[carNum[i]-1].type==state || cars[carNum[i]-1].type==1){
50                 for (int j = 0; j <i ; j++) { //用于去除重复的车名
51                     if(carNum[j]==carNum[i]){
52                         carFlag=0;
53                         break;
54                     }
55                 }
56                 if (carFlag ==1){
57                     System.out.print(cars[carNum[i]-1].carName+" ");
58                 }
59                 if ( state==0) {
60                     sumNum +=cars[carNum[i]-1].loadMan;
61 
62                 }
63                 else {
64                     sumNum +=cars[carNum[i]-1].loadThing;
65 
66                 }
67 
68             }
69         }
70         return sumNum;
71     }
72 
73 }

 1 public class AllCar { //所有车的父类
 2     public int carNum;
 3     public String carName;
 4     public int carPrice;
 5     public int loadMan;
 6     public int loadThing;
 7     public int type; // 0 载人 ，1 载人 载货 ，2 载货
 8     public AllCar( int carNum,String carName, int carPrice,int loadMan ,int loadThing, int type){
 9         this.carNum = carNum;
10         this.carName = carName;
11         this.carPrice = carPrice;
12         this.loadMan = loadMan;
13         this.loadThing = loadThing;
14         this.type =type;
15     }
16     public void print(){ //用于输出车辆信息
17         if(type ==0){
18             System.out.printf("%-4s %-10s %-10s %-10s",this.carNum+".",this.carName,this.carPrice+"元/天","载人："+this.loadMan+"人");
19         }
20         else {
21             System.out.printf("%-4s %-10s %-10s %-10s", this.carNum+".",this.carName,this.carPrice+"元/天","载货："+this.loadThing+"吨");
22         }
23 
24     }
25 }

public class Car extends AllCar {
    public Car(int carNum, String carName, int carPrice, int loadMan,int type) {
        super(carNum, carName, carPrice, loadMan,0, type);
    }
}
public class PickUpTruck extends AllCar {

    public PickUpTruck(int carNum, String carName, int carPrice, int loadMan, int loadThing, int type) {
        super(carNum, carName, carPrice, loadMan, loadThing, type);
    }


    @Override
    public void print() {
        System.out.printf("%-4s %-10s %-10s %s %s ",this.carNum+".",this.carName,this.carPrice+"元/天","载人："+this.loadMan+"人","载货："+this.loadThing+"吨");

    }
}
public class Truck extends AllCar {
    public Truck(int carNum, String carName, int carPrice,  int loadThing, int type) {
        super(carNum, carName, carPrice,0,loadThing, type);
    }
}