说明：  RS编码是一种通信中常用的纠错编码。RS译码中的BM迭代算法较为常用，此代码为RS译码中BM迭代算法的C实现
(RS coding is used in error correction coding in a communication. The RS decoding BM iterative algorithm is more commonly used, the code for the RS decoding BM iterative algorithm implemented in C)