请多指教 达达租车，基本实现功能

第一天写，输出已选择的车功能未实现。然后参考了几位同学的代码，写出来了，在此贴上链接。
MikaMika：http://www.imooc.com/article/6381
小尾巴都糊了：http://www.imooc.com/article/9507
charsandrew：http://www.imooc.com/article/10181
ajjrx丶3647181：http://www.imooc.com/article/10379
Car父类

package com.kkk;

public class Car {
    private String name;
    private int money;
    private int man;
    private int huo;

    public Car(String name, int money, int man, int huo) {// ??????????????????
        // TODO Auto-generated constructor stub
        this.huo = huo;
        this.name = name;
        this.money = money;
        this.man = man;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getMoney() {
        return money;
    }

    public void setMoney(int money) {
        this.money = money;
    }

    public int getMan() {
        return man;
    }

    public void setMan(int man) {
        this.man = man;
    }

    public int getHuo() {
        return huo;
    }

    public void setHuo(int huo) {
        this.huo = huo;
    }

    @Override
    public String toString() {
        return " " + name + "   单价" + money + "元/天，  载人数" + man + "人，   载货量"
                + huo + "吨";
    }

}

载客车-子类

package com.kkk;

public class ManCar extends Car {
    public ManCar(String name, int money, int man) {
        super(name, money, man, 0);

    }

}

载货车-子类

package com.kkk;

public class HuoCar extends Car {
    public HuoCar(String name, int money, int huo) {
        super(name, money, 0, huo);

    }

}

皮卡-子类

package com.kkk;

public class TwoCar extends Car {
    public TwoCar(String name, int money, int man, int huo) {
        super(name, money, man, huo);

    }

}

主函数

package com.kkk;

import java.util.Scanner;

public class Initial {

    public static void main(String[] args) {
        Car[] cars = { new ManCar("奥迪A4", 500, 4), new ManCar("马自达6", 400, 4),
                new TwoCar("皮卡雪6", 450, 4, 2), new ManCar("金龙", 800, 20),
                new HuoCar("松花江", 400, 4), new HuoCar("依维柯", 1000, 20) };
        System.out.println("欢迎来大大租车系统\n请确定您是否要租车：1.是      2.否");
        Scanner input = new Scanner(System.in);
        int yes = input.nextInt();
        if (yes == 1) {
            System.out.println("可租车价目表");
            for (int i = 0; i < 6; i++) {
                System.out.println(i + 1 + "." + cars[i].toString());
            }
            System.out.println("您要租几辆车？");
            int number = input.nextInt();
            System.out.println("您想租几天？");
            int days = input.nextInt();
            int[] num = new int[number];
            for (int j = 0; j < number; j++) {
                System.out.println("*****请输入您想租的第" + (j + 1) + "辆车的序号*****");
                num[j] = input.nextInt();
                if (num[j] > 6  num[j] < 0) {
                    System.out.println("请输入1~6的数字");//这里如果输入错误程序还是会出错，暂时不知道如何解决

                }

            }
            System.out.println("您租的可载人的车有：");//如果选了两辆可载人的车会输出两次，这是一个问题，暂时不知道如何修改

            int manNumber = 0;
            int price1 = 0;
            for (int i = 0; i < number; i++) {
                if ((cars[num[i] - 1] instanceof ManCar)
                         (cars[num[i] - 1] instanceof TwoCar)) {
                    manNumber += cars[num[i] - 1].getMan();
                    System.out.print(cars[num[i] - 1].getName() + "  ");
                    price1 += cars[num[i] - 1].getMoney();

                }
            }
            System.out.println("\n您租的可载货的车有：");
            int huoNumber = 0;
            int price2 = 0;
            for (int i = 0; i < number; i++) {
                if ((cars[num[i] - 1] instanceof HuoCar)
                         (cars[num[i] - 1] instanceof TwoCar)) {
                    huoNumber += cars[num[i] - 1].getHuo();
                    System.out.print(cars[num[i] - 1].getName() + "  ");
                    price2 += cars[num[i] - 1].getMoney();

                }
            }
            int twoNum=0;
            for(int i=0;i<number;i++){//皮卡的价格加了两次，这里算租了几辆皮卡，最后算价格时减去
                if(cars[num[i] - 1] instanceof TwoCar){
                    twoNum++;
                }
            }
            System.out.println("\n您选择的车共可载人：" + manNumber + "人");
            System.out.println("您选择的车共可载货：" + huoNumber + "吨");
            System.out.println("您共需付款：" + ((price1 + price2-twoNum*450) * days));
            System.out.println("欢迎下次再来租车！");

        } else {
            System.out.println("下次您想租车还可以找我们！");
        }

    }

}