有一个小型超市，出售N（N>＝10）种商品，设计并实现一个系统，完成下列功能： 1． 保存及输出。 2． 计算并排序。 3． 统计。-There is a small supermarket, sell N (N> = 10) kinds of goods, design and implement a system, perform the following functions: 1. Preservation and output. 2. Calculated an