用Java编写一个租车小程序

要求实现的功能有：

1.展示所有可租车辆

2.选择车型，租车量

3.显示租车清单，包括：总载货量，总载客量，总金额等；

4、车辆类型

客车：只能载客

货车：只能载货

皮卡：既能载人，有能载货

Java代码：

package car.rental.applet;
import java.util.Scanner;class Vehicle{String name;int num;int passenger_num;int goods_num;int rental_cost;void vehicle_type(int a,int b) {passenger_num = a;goods_num = b;if(passenger_num == 0) {System.out.print("只能载货"+"                  ");}else if(goods_num == 0) {System.out.print("只能载客"+"                  ");}else{System.out.print("既能载人有能载货"+"   ");}}void vehicle_message(int a,String ch,int b) {num = a;name = ch;rental_cost = b;System.out.print(num+"     "+name+"     "+rental_cost+"元"+"       ");}void capacity(int a,int b) {passenger_num = a;goods_num = b;if(passenger_num == 0) {System.out.println("载货量:"+goods_num+"吨");}else if(goods_num == 0) {System.out.println("载客量:"+passenger_num+"人");}else{System.out.println("载货量:"+goods_num+"吨"+" "+"载客量:"+passenger_num+"人");}}
}class Bus extends Vehicle{String name = "客车";int num = 1;int passenger_num = 33;int goods_num = 0;int rental_cost = 123;
}class Truck extends Vehicle{String name = "货车";int num = 2;int passenger_num = 0;int goods_num = 210;int rental_cost = 189;
}class Pickup_truck extends Vehicle{String name = "皮卡";int num = 3;int passenger_num = 22;int goods_num = 120;int rental_cost = 345;
}public class Demo {public Demo() {// TODO 自动生成的构造函数存根}public static void main(String[] args) {// TODO 自动生成的方法存根System.out.println("欢迎来到在线租车系统：");System.out.println("可供选择的车辆有如下几种：");Bus bus = new Bus();Truck truck = new Truck();Pickup_truck pickup = new Pickup_truck();System.out.println("型号"+"         "+"车名"+"     "+"日租金额"+"     "+"类型"+"                        "+"容量");bus.vehicle_message (bus.num,bus.name,bus.rental_cost);bus.vehicle_type (bus.passenger_num, bus.goods_num);bus.capacity (bus.passenger_num,bus.goods_num);truck.vehicle_message (truck.num,truck.name,truck.rental_cost);truck.vehicle_type (truck.passenger_num, truck.goods_num);truck.capacity (truck.passenger_num,truck.goods_num);pickup.vehicle_message (pickup.num,pickup.name,pickup.rental_cost);pickup.vehicle_type (pickup.passenger_num, pickup.goods_num);pickup.capacity (pickup.passenger_num,pickup.goods_num);System.out.println ("请手动输入您要租用的车辆型号以及租车量:");Scanner in = new Scanner(System.in);int choice = in.nextInt();int num = in.nextInt();int cost = 0,p_num = 0,g_num = 0;if(choice == 1) {System.out.println("您已选择：");p_num = num*bus.passenger_num;cost = cost+bus.rental_cost*num;System.out.println("客车"+"     "+"载客量为："+p_num+"     "+"金额为："+cost+"元");}else if(choice == 2) {System.out.println("您已选择：");g_num = num*truck.goods_num;cost = cost+truck.rental_cost*num;System.out.println("货车"+"     "+"载货量为："+g_num+"     "+"金额为："+cost+"元");}else {System.out.println("您已选择：");p_num = num*pickup.passenger_num;g_num = num*pickup.goods_num;cost = cost+pickup.rental_cost*num;System.out.println("皮卡"+"     "+"载客量为："+p_num+"，载货量为："+g_num+"     "+"金额为："+cost+"元");}System.out.println("是否继续选择租用车辆：输入0继续，输入1退出租车系统");int flag = in.nextInt();while(flag != 1) {System.out.println ("请手动输入您要租用的车辆型号以及租车量:");choice = in.nextInt();num = in.nextInt();if(choice == 1) {System.out.println("您已选择：");p_num = p_num+num*bus.passenger_num;cost = cost+bus.rental_cost*num;System.out.println("客车"+"     "+"载客量为："+p_num+"     "+"金额为："+cost+"元");}else if(choice == 2) {System.out.println("您已选择：");g_num = g_num+num*truck.goods_num;cost = cost+truck.rental_cost*num;System.out.println("货车"+"     "+"载货量为："+g_num+"     "+"金额为："+cost+"元");}else {System.out.println("您已选择：");p_num = p_num+num*pickup.passenger_num;g_num = g_num+num*pickup.goods_num;cost = cost+pickup.rental_cost*num;System.out.println("皮卡"+"     "+"载客量为："+p_num+"，载货量为："+g_num+"     "+"金额为："+cost+"元");}System.out.println("是否继续选择租用车辆：输入0继续，输入1退出租车系统");flag = in.nextInt();}System.out.println("以下是您的租车清单:");System.out.println("总载客量为："+p_num+"     "+"总载货量为："+g_num+"     "+"总金额为："+cost+"元");System.out.println("感谢您的使用，在线租车系统很乐意为您服务,欢迎下次光临！");}}

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