说明：  这是一个小型餐厅点菜系统，它可以显示菜单, 包括菜的编号、菜名、类别和单价，顾客可以随意点菜,也可按类查找，炒菜、炒饭和面类，也可以在已点菜的基础上删除或添加菜，并根据顾客需求自动生成菜单,最后还可以使用优惠劵并自动计算消费金额。
(This is a small restaurant a la carte system, It can display the menu, including the number of dishes, dish, category and price, Customers are free to order, also according to the class to find, stir-fries, fried rice and noodles, You can also delete or add a la carte dishes at the base has been on the And automatically generate menus based on customer needs, Finally, you can also automatically calculate the amount of consumption and use coupons.)