1.库存查询：检索当前三种商品的储存量；

2.商品上架：为三种商品增加或者减少储量；

3.销售查询：分别统计今天每种商品的销售量和销售额；

4.会计查询：打印当天的往来帐目以及剩余零钞数目；

5.结算功能：取出今天所有的10元纸币，并且分别设置零钞的数目；

6.销售界面：顾客投入纸币，选择商品，获得商品和零钱；或者直接显示错误并退还纸币；

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1 Stock: retrieve the current storage capacity of the three commodities

(2) Goods Added: increase or decrease reserves of three commodities

(3) Sales Enquiries: statistics today each commodity sales and sales

4 Accounting Enquiries: Print current accounts and the remaining number Lingchao day

5 clearing functions: Remove all of today s $ 10 notes, and the number of Lingchao were set

6 Sales Interface: Customer banknotes, select merchandise, goods and coins　or directly display the error and refund the bill