说明：  AES算法主要包含三个方面：轮变化、轮数与密钥扩展。本文以128为例例，介绍算法的基本原理；结合C语言，实现高级数据加密算法AES（AES
(The AES algorithm mainly includes three aspects: the wheel changes, the number of rounds and key expansion. To 128, for example cases to introduce the basic principles of the algorithm combined with the C language, and advanced data encryption algorithm AES (AES)