一个饮料自动售货机可以放置三种不同的饮料：顾客根据自己的喜好选择饮料投币购买，系统售出饮料并自动找零，库存不足则无法购买。存货员可根据销售状况添加不同数量的饮料。每售出一瓶饮料系统会自动计数并计算销售额，收银员取款后会显示销售记录并将销售记录清零。可创建一个文件储存商品信息，通过对象数组drk[]来记录饮料的相关信息，并通过查找，添加，删除等操作实现所需功能。-A drink vending machine can be placed in three different drinks: Customer according to their own preferences drinks coin purchase, the system and automatically through irregular beverages sold, inventory, can not buy enough. Inventory sales staff can add a different number of drinks. The sale of each bottle of beverage system will automatically count and calculate the sales, cashier, withdrawals and post-sales records will show sales records cleared. You can create a document storage product information, through an array of objects drk [] to record drink-related information and by looking for, add, delete and other operations to achieve the required functionality.