实现在餐馆的点菜功能，有管理员，服务员，经理三个角色，能够实现人员的增删改查，菜谱的增删改查，还有台桌的增删改查，最后实现收额。使用了通用链表-Implementation in the a la carte restaurant function, administrators, waiter, manager of the three roles to achieve personnel crud, recipes crud, and table crud and finally reali