/**
 * @authar HanSin
 * @date 2021/4/15 8:22
 */
class Shop {
   static Scanner sc = new Scanner(System.in);

   static Object arr[][] = {{1000, 10.0, "笔记本"}, {1001, 2.0, "西红柿"}, {1002, 5.0, "辣条"}, {0, 0, "0"}, {0, 0, "0"}, {0, 0, "0"}};
   static int xx = 3;

   //1.获取清单
   public void qingdan() {
      System.out.println("=====超市管理系统=====");
      System.out.println("1：货物清单 2：增加货物 3：删除货物 4：修改货物 5 退出");
   }

   //1.1
   public void qingdan1() {
      System.out.println("=====商品清单=====");
      System.out.println("商品编号" + "\t" + "商品单价" + "\t" + "商品名称");
      for (int i = 0; i < arr.length; i++) {
         if ((int) arr[i][0] != 0)
            System.out.println(arr[i][0] + "\t" + arr[i][1] + "\t\t" + arr[i][2]);
      }
   }

   //2.添加货物
   public void add() {
      System.out.println("请输入你要添加的商品功能：");
      System.out.println("输入商品的编号");
      int id = sc.nextInt();
      arr[xx][0] = id;
      System.out.println("请输入商品单价");
      double price = sc.nextDouble();
      arr[xx][1] = price;
      System.out.println("请输入商品名称");
      String commodity = sc.next();
      arr[xx][2] = commodity;
      xx++;
      System.out.println(xx);
      System.out.println("添加成功");
   }

   //删除货物
   public void delete() {
      System.out.println("选择的是删除功能");
      System.out.println("输出要删除的商品编号ID");
      int delete = sc.nextInt();
      for (int i = 0; i < arr.length; i++) {
         if (delete == (int) arr[i][0]) {
            arr[i][0] = 0;
         }
      }
      System.out.println("删除成功");
   }

   //修改货物
   public void update() {
      System.out.println("选择的是修改功能");
      System.out.println("请选择你要修改的商品编号：");
      int update = sc.nextInt();
      for (int i = 0; i < arr.length; i++) {
         if (update == (int) arr[i][0]) {
            System.out.println("输入商品的编号");
            int id = sc.nextInt();
            arr[i][0] = id;
            System.out.println("请输入商品单价");
            double price = sc.nextDouble();
            arr[i][1] = price;
            System.out.println("请输入商品名称");
            String commodity = sc.next();
            arr[i][2] = commodity;
         }
      }
      System.out.println("修改成功");
   }
} ```