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

   static Object arr[][] = {{1000, 10.0, "筆記本"}, {1001, 2.0, "西紅柿"}, {1002, 5.0, "辣條"}, {0, 0, "0"}, {0, 0, "0"}, {0, 0, "0"}};
   static int xx = 3;

   //1.獲取清單
   public void qingdan() {
      System.out.println("=====超市管理系統(tǒng)=====");
      System.out.println("1：貨物清單 2：增加貨物 3：刪除貨物 4：修改貨物 5 退出");
   }

   //1.1
   public void qingdan1() {
      System.out.println("=====商品清單=====");
      System.out.println("商品編號" + "\t" + "商品單價(jià)" + "\t" + "商品名稱");
      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.添加貨物
   public void add() {
      System.out.println("請輸入你要添加的商品功能：");
      System.out.println("輸入商品的編號");
      int id = sc.nextInt();
      arr[xx][0] = id;
      System.out.println("請輸入商品單價(jià)");
      double price = sc.nextDouble();
      arr[xx][1] = price;
      System.out.println("請輸入商品名稱");
      String commodity = sc.next();
      arr[xx][2] = commodity;
      xx++;
      System.out.println(xx);
      System.out.println("添加成功");
   }

   //刪除貨物
   public void delete() {
      System.out.println("選擇的是刪除功能");
      System.out.println("輸出要?jiǎng)h除的商品編號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("刪除成功");
   }

   //修改貨物
   public void update() {
      System.out.println("選擇的是修改功能");
      System.out.println("請選擇你要修改的商品編號：");
      int update = sc.nextInt();
      for (int i = 0; i < arr.length; i++) {
         if (update == (int) arr[i][0]) {
            System.out.println("輸入商品的編號");
            int id = sc.nextInt();
            arr[i][0] = id;
            System.out.println("請輸入商品單價(jià)");
            double price = sc.nextDouble();
            arr[i][1] = price;
            System.out.println("請輸入商品名稱");
            String commodity = sc.next();
            arr[i][2] = commodity;
         }
      }
      System.out.println("修改成功");
   }
} ```