LDPC目前用的最多、性能最好的译码算法为BP译码算法，本程序用C语言对BP译码算法进行了实现，为了方便初学者，本文还附带了两篇关于BP算法的论文。-LDPC is currently the most used, the best performance of the decoding algorithm for BP decoding algorithm, this procedure using C language on the BP decoding algorithm is implemented, in order to facilitate the beginners, this paper also comes with two pieces of paper on the BP algorithm. LDPC is currently the most used, the best performance of the decoding algorithm for BP decoding algorithm, this procedure using C language on the BP decoding algorithm is implemented, in order to facilitate the beginners, this paper also comes with two pieces of paper on the BP algorithm.