程序代码：

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sca = new Scanner(System.in);
        System.out.println("已买到商品清单：");
        while (sca.hasNext()) {
            int n = sca.nextInt();
            ShopCar ps = new ShopCar(n + 1);
            for (int i = 1; i <= n; i++) {
                String sh = sca.next();
                char c = sh.charAt(0);

                if (c == 'B') {
                    ps.add(new Book(sca.next(), sca.nextFloat(), sca.nextInt(),
                            sca.next(), sca.next()));
                    ps.print();
                }
                if (c == 'C') {
                    ps.add(new Cloths(sca.next(), sca.nextFloat(), sca
                            .nextInt(), sca.next(), sca.next()));
                    ps.print();
                }
            }
        }

    }
}

abstract class Goods {
    private String name;
    private float price;
    private int count;

    Goods(String name, float price, int count) {
        this.setName(name);
        this.setPrice(price);
        this.setCount(count);
    }

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

    public String getName() {
        return this.name;
    }

    public void setPrice(float p) {
        this.price = p;
    }

    public float getPrice() {
        return this.price;
    }

    public void setCount(int n) {
        this.count = n;
    }

    public int getCount() {
        return this.count;
    }

    public abstract void getInfo();
}

class Book extends Goods {
    private String publish;
    private String author;

    Book(String name, float price, int count, String au, String pu) {
        super(name, price, count);
        this.setAuthor(au);
        this.setPublish(pu);
    }

    public void setAuthor(String n) {
        this.author = n;
    }

    public String getAuthor() {
        return this.author;
    }

    public void setPublish(String n) {
        this.publish = n;
    }

    public String getPublish() {
        return this.publish;
    }

    public void getInfo() {
        System.out.println("书名：" + super.getName() + "，单价：" + super.getPrice()
                + "f，数量：" + super.getCount());
    }

}

class Cloths extends Goods {
    private String title;
    private String style;

    Cloths(String name, float price, int count, String au, String pu) {
        super(name, price, count);
        this.setTitle(au);
        this.setStyle(pu);
    }

    public void setTitle(String n) {
        this.title = n;
    }

    public String getTitle() {
        return this.title;
    }

    public void setStyle(String n) {
        this.style = n;
    }

    public String getStyle() {
        return this.style;
    }

    public void getInfo() {
        System.out.println("品名：" + super.getName() + "，单价：" + super.getPrice()
                + "f，数量：" + super.getCount());
    }

}

class ShopCar {
    private Goods[] goods;
    private int foot;

    public ShopCar(String n, float price, int count) {

    }

    public ShopCar(int len) {
        if (len > 0) {
            this.goods = new Goods[len];
        } else {
            this.goods = new Goods[1];
        }
    }

    public boolean add(Goods goods) {
        if (this.foot < this.goods.length) {
            this.goods[this.foot] = goods;
            return true;
        } else {
            return false;
        }
    }

    public void print() {

        for (int i = 0; i < goods.length; i++) {
            if (goods[i] != null) {
                goods[i].getInfo();// 这个调用的是子类中的信息吗？？
            }
        }
    }
}