这是一个餐厅管理系统，具有预订，点餐，取消预订，所选菜色可是插入到数据库，之后可通过单击按钮，计算就餐金额。-This is a restaurant management system, with reservations, order food, canceled reservations, but insert the selected recipes to the database, and then by clicking the button to calculate the amo