用PEG方法生成的围长符合输入要求的规则ldpc码的源程序C语言版。-PEG Generation of Girth accordance with the importation requirements of the source code ldpc C language version.

LDPC中消除四环的C源代码，供信道编码的研究者参考-Elimination of the C Ring LDPC source code for channel coding of the researchers refer to

LDPC码编码的PEG算法，亲测代码真实有效(PEG algorithm for LDPC code coding)