说明：  RS编译码是通信的一种常用纠错编码。其中译码算法中MEA算法用于求错误位置多项式。此代码为MEA算法的C实现。
(RS encoding and decoding is a common error correction encoding of the communication. Where the decoding algorithm the MEA algorithm is used to find the error location polynomial. This code algorithm in C MEA implementation.)