超市收银，一个初级的商店收银系统，适合初级学习这课程设计-Supermarket cashier, a store cashier primary system, suitable for primary learning in this course design

带显示功能的扣款收银，可应用于学校食堂、超市等地。-Debit cash register with a display function, can be applied to school canteens, supermarkets and other places.