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import java.util.*;

/** @pdOid 96931d41-3c38-42f7-8656-38660e3a35d0 */
public abstract class Car {
   /** @pdOid 010597b9-b9a3-4aeb-b2db-0aa391df8bc9 */
   protected String carName;
   /** @pdOid 799c73bc-a09f-4171-8262-823d0a847312 */
   protected double rents;
   /** @pdOid a68a358b-d4b0-4133-bf22-b9d2e5e9e00b */
   protected String carType;
   /** @pdOid 254aa617-8fbb-4cf7-86d2-0d462097b100 */
   protected String capicity;

   public Car(String carname2, int rents2) {
	// TODO Auto-generated constructor stub
		this.carName = carname2;
		this.rents = rents2;
   }

}
/***********************************************************************
 * Module:  PassengerCar.java
 * Author:  鏂颁竴
 * Purpose: Defines the Class PassengerCar
 ***********************************************************************/

import java.util.*;

/** @pdOid 09d2dd0e-1caa-4942-8951-3dda86db4488 */
public class PassengerCar extends Car {
	public PassengerCar(String carname,int rents,int capicity)
	{
		super(carname,rents);
		if(capicity<5)
			this.carType="小汽车";
		else{
			this.carType="大客车";
		}
		this.capicity = capicity+"人/辆";
	}
}
/***********************************************************************
 * Module:  Truck.java
 * Author:  鏂颁竴
 * Purpose: Defines the Class Truck
 ***********************************************************************/

import java.util.*;

/** @pdOid fbb53fc2-6c0d-47e4-910c-be9b4bea4572 */
public class Truck extends Car {
	public Truck(String carname,int rents,int capicity)
	{
		super(carname,rents);
		if(capicity<5)
		{
			this.carType="轻型货车";
		}
		else{
			this.carType="重型货车";
		}
		this.capicity = capicity+"吨/辆";
	}
}
/***********************************************************************
 * Module:  PickUp.java
 * Author:  鏂颁竴
 * Purpose: Defines the Class PickUp
 ***********************************************************************/

import java.util.*;

/** @pdOid 4e005cc0-5b4a-4cc2-b76f-2778450ec85a */
public class PickUp extends Car {
   /** @pdOid b0eccce9-6d5f-4d14-919d-d254fa432565 */
   private int goodsCapicity;
   /** @pdOid 1e0ee642-507d-4e5d-bc3d-09838a2e15c0 */
   private int passengerCapicity;

	public PickUp(String carname,int rents,int pcapicity,int gcapicity)
	{			
		super(carname,rents);
		this.carType = "皮卡";

		this.goodsCapicity = gcapicity;
		this.passengerCapicity = pcapicity;
		
		this.capicity = "载客:"+pcapicity+"人/辆   载货:"+gcapicity+"吨/辆  ";
	}
}
//主函数所在类
import java.util.Scanner;
public class InitialClass {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("请问您要租车吗?是按1,否按0");
		Scanner sc = new Scanner(System.in);
		int i;
		do
		{
			System.out.print("请输入:");
			i = sc.nextInt();
			if(0 == i){
				System.out.print("您已退出程序!");
				return; //不租车,程序返回
			}
			else if (1 == i){
				Car[] AllCars = {new Truck("解放",1000,15),new Truck("奔驰卡车",800,4),new Truck("金杯",900,10),new PassengerCar("宝马",1000,5),new PassengerCar("Smart",657,2),new PassengerCar("Mini",650,4),new PickUp("东风皮卡",500,5,5)};			
				System.out.println("以下是可供选择的车型:");
				System.out.printf("%-15s%-15s%-15s%-15s%-15s\n","选车","车名","类型","租金","容量");				
				for(int j=0;j<AllCars.length;j++)
				{
					System.out.printf("%-15s%-15s%-15s%-15s%-15s\n",j+1,AllCars[j].carName,AllCars[j].carType,AllCars[j].rents,AllCars[j].capicity);
				}
				System.out.print("您准备租几梁车?");
				int num = sc.nextInt();
				int[] carnum = new int[num];//存放车的编号
				int[] days = new int[num];
				double allrents=0;//总费用
				
				for(int ii=0;ii<num;ii++){
					System.out.print("请输入车的编号:");
					carnum[ii] = sc.nextInt();
					System.out.println();
					System.out.println("请输入该车租用的天数:");
					days[ii] = sc.nextInt();
					allrents += AllCars[carnum[ii]-1].rents * days[ii];
				}
				System.out.println("您的订单为:");
				System.out.printf("%-15s%-15s%-15s%-15s%-15s%-15s%-15s\n","编号","车名","类型","租金","容量","租借天数","该车租费");
				for(int j=0;j<num;j++)
				{
					System.out.printf("%-15s%-15s%-15s%-15s%-15s%-15s%-15s\n",carnum[j],AllCars[carnum[j]-1].carName,AllCars[carnum[j]-1].carType,AllCars[carnum[j]-1].rents,AllCars[carnum[j]-1].capicity,days[j],AllCars[carnum[j]-1].rents * days[j]);
				}
				System.out.print("总费用为:"+allrents);				
			}
			else{
				System.out.println("请输入正确数字");
			}
		}while(i!=0&&i!=1);
	}

}


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1 回答

int型数据格式化建议使用%d, double型数据格式化建议使用%f

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交作业,"格式化输出"显示有问题,请大家来完善并分析其中的不足~~

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