答答租车系统有个点写不出来了，求帮助！！

Question

/*

问题：User类账单部分要求显示用户选中的车有哪些是可以载人的，一共载人数量是多少以及那些车是载货的，共载货多少

但我在自己的代码中到这里就卡壳了，请求各位大神的指导和帮助！谢谢！

如图：

*/

Tool类
public  class Tool {
    char no;
    String name;
    int rent;
      public char getNo() {
        return no;
    }
    public void setNo(char no) {
        this.no = no;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getRent() {
        return rent;
    }
    public void setRent(int rent) {
        this.rent = rent;
    }
}
piKa类
public class piKa extends Tool{
   private int personCapacity;
   private int goodsCapacity;
   public piKa(char no,String name,int rent,int personCapacity,int goodsCapacity){
      this.no=no;
      this.name=name;
      this.rent=rent;
      this.personCapacity= personCapacity;
      this.goodsCapacity=goodsCapacity;
  }
    public int getPersonCapacity() {
        return personCapacity;
    }
    public void setPersonCapacity(int personCapacity) {
        this.personCapacity = personCapacity;
    }
    public int getGoodsCapacity() {
        return goodsCapacity;
    }
    public void setGoodsCapacity(int goodsCapacity) {
        this.goodsCapacity = goodsCapacity;
    }
}
HuoChe类
public class huoChe extends Tool {
    int goodsCapacity;
     public huoChe(char no,String name,int  rent,int  goodsCapacity){
      this.no=no;
      this.name=name;
      this.rent=rent;
      this. goodsCapacity=  goodsCapacity;
  }
    public int getGoodsCapacity() {
        return goodsCapacity;
    }
    public void setGoodsCapacity(int goodsCapacity) {
        this.goodsCapacity = goodsCapacity;
    }  
}
KeChe类
public class keChe extends Tool{
     private int personCapacity;
     public keChe(char no,String name,int rent,int personCapacity){
      this.no=no;
      this.name=name;
      this.rent=rent;
      this.personCapacity= personCapacity;
  }
public int getPersonCapacity() {
        return personCapacity;
    }
    public void setPersonCapacity(int personCapacity) {
        this.personCapacity = personCapacity;
    }
}
public class User {
    static  Scanner input = new Scanner(System.in);
    static Tool[] t={new keChe('1',"奥迪A4",500,4),new keChe('2',"马自达6",400,4),
                new piKa('3',"皮卡雪6",450,4,2),new keChe('4',"金龙",800,20),
                new huoChe('5',"松花江",400,4),new huoChe('6',"依维柯",1000,20)};
    
     public void zuChe(){
        
         System.out.println("欢迎来到答答租车系统！");
         System.out.println("您是否要租车：");
          System.out.println("1:是 0:否");
       
        int a = input.nextInt();
        if(a==1){
            System.out.println("您可租车的类型及价目表:"); 
             System.out.println("序号\t汽车名称\t价目表\t\t容量");
             for(Tool tool:t){
                 if(tool instanceof keChe)
                 System.out.println(tool.getNo()+"\t"+tool.getName()+"\t"+tool.getRent()
                         +"元/天"+"\t\t"+"载人："+((keChe)tool).getPersonCapacity()+"人");
                 if(tool instanceof huoChe)
                 System.out.println(tool.getNo()+"\t"+tool.getName()+"\t"+tool.getRent()
                         +"元/天"+"\t\t"+"载货："+((huoChe)tool).getGoodsCapacity()+"吨");
                 if(tool instanceof piKa)
                 System.out.println(tool.getNo()+"\t"+tool.getName()+"\t"+tool.getRent()
                         +"元/天"+"\t\t"+"载人："+((piKa)tool).getPersonCapacity()+"人"+" "+"载货："+((piKa)tool).getGoodsCapacity()+"吨");
                 
             }
        }
     }
        public void select(){
        System.out.println("请输入您要租车的数量："); 
             int b = input.nextInt();
             int selectVclID[]=new int[b];
             int  costPerDay=0;
             for(int i=0;i<b;i++){
                 System.out.println("请输入第"+(i+1)+"辆车的序号：");
                 selectVclID[i]=input.nextInt()-1;
                 costPerDay+=t[selectVclID[i]].rent;
              }
             System.out.println("请输入租车的天数：");
            
              int rentDays=input.nextInt();
              int allCost=costPerDay*rentDays;
              System.out.println("您的账单：");
               int peopleSum = 0 , volSum = 0 ;
                System.out.println("***租车的总价格为："+allCost); 
        }
}
Main类
public class Main {
    public static void main(String args[]){
        User user = new User();
        user.zuChe();
        user.select();
   } 
}

Answer 1

这个在问答区的置顶帖子里面有写好的案例，而且还有大牛的分析，你可以看看