完善内容

while(true) {
            label79:
            while(true) {
                System.out.println("请开始你的选餐:（根据序号选择，按0退出）");
                String input = sc.next();
                food snackFood;
                food snackFood1;
                String food;
                String confirm;
                if (Objects.equals(input, "1")) {
                    snackFood = new food("面条", "主食", 10.98);
                    foods.add(snackFood);
                    snackFood1 = new food("糖醋里脊", "主菜/肉类", 66.99);
                    foods.add(snackFood1);
                    System.out.println("1、" + foods.get(0) + "\n2、" + foods.get(1));

                    while(true) {
                        while(true) {
                            System.out.println("请开始你的食品:（根据食品序号选择，按0进行结算）");
                            food = sc.next();
                            if ("1".equals(food)) {
                                sum += snackFood.getPrice();
                            } else if ("2".equals(food)) {
                                foods.add(snackFood1);
                                sum += snackFood1.getPrice();
                            } else if ("0".equals(food)) {
                                System.out.println("正在为你结算...");
                                System.out.println("你需要支付" + sum + "￥");
                                System.out.println("是否确认支付？1确认，0不支付");
                                confirm = sc.next();
                                if ("1".equals(confirm)) {
                                    if (sum > user.getBalance()) {
                                        System.out.println("当前余额不足，请充值！拜拜");
                                    } else {
                                        user.substractMoney(sum);
                                        System.out.println("您当前所剩余额:" + user.getBalance());
                                        System.out.println("支付成功！");
                                    }
                                    continue label79;
                                }
                            }
                        }
                    }
                } else if (Objects.equals(input, "2")) {
                    snackFood = new food("汉堡包", "主食/油炸类", 6.99);
                    foods.add(snackFood);
                    snackFood1 = new food("薯条", "油炸类", 8.99);
                    foods.add(snackFood1);
                    System.out.println("1、" + foods.get(0) + "\n2、" + foods.get(1));

                    while(true) {
                        while(true) {
                            System.out.println("请开始你的食品:（根据食品序号选择，按0退出选餐）");
                            food = sc.next();
                            if ("1".equals(food)) {
                                sum += snackFood.getPrice();
                            } else if ("2".equals(food)) {
                                sum += snackFood1.getPrice();
                            } else if ("0".equals(food)) {
                                System.out.println("正在为你结算...");
                                System.out.println("你需要支付" + sum + "￥");
                                System.out.println("是否确认支付？1确认，0不支付");
                                confirm = sc.next();
                                if ("1".equals(confirm)) {
                                    if (sum > user.getBalance()) {
                                        System.out.println("当前余额不足，请充值！拜拜");
                                    } else {
                                        user.substractMoney(sum);
                                        System.out.println("您当前所剩余额:" + user.getBalance());
                                        System.out.println("支付成功！");
                                    }
                                    continue label79;
                                }
                            }
                        }
                    }
                } else if (!Objects.equals(input, "3")) {
                    if (Objects.equals(input, "0")) {
                        System.out.println("欢迎下次继续点单！");
                        return;
                    }

                    System.out.println("您的输入有误，请重新输入");
                } else {
                    snackFood = new food("爆浆牛丸", "小吃/丸子类", 5.89);
                    foods.add(snackFood);
                    snackFood1 = new food("手抓饼", "杂粮类", 12.99);
                    foods.add(snackFood1);
                    System.out.println("1、" + foods.get(0) + "\n2、" + foods.get(1));

                    while(true) {
                        while(true) {
                            System.out.println("请开始你的食品:（根据食品序号选择，按0退出选餐）");
                            food = sc.next();
                            if ("1".equals(food)) {
                                sum += snackFood.getPrice();
                            } else if ("2".equals(food)) {
                                sum += snackFood1.getPrice();
                            } else if ("0".equals(food)) {
                                System.out.println("正在为你结算...");
                                System.out.println("你需要支付" + sum + "￥");
                                System.out.println("是否确认支付？1确认，0不支付");
                                confirm = sc.next();
                                if ("1".equals(confirm)) {
                                    if (sum > user.getBalance()) {
                                        System.out.println("当前余额不足，请充值！拜拜");
                                    } else {
                                        user.substractMoney(sum);
                                        System.out.println("您当前所剩余额:" + user.getBalance());
                                        System.out.println("支付成功！");
                                    }
                                    continue label79;
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    public void chineseDisplayArea() {
        System.out.println("中餐展示:");
        food.ourFood ourFood = new food.ourFood();
        ourFood.foodIntroduction();
    }

    public void foreignDisplayArea() {
        System.out.println("西餐展示:");
        food.ourFood ourFood = new food.ourFood();
        ourFood.inwardFoodIntroduction();
    }

    public void snackDisplayArea() {
        System.out.println("小吃展示:");
        food.ourFood ourFood = new food.ourFood();
        ourFood.snackIntroduction();
    }
}