这是（2，1，7）viterbi编码和译码的c语言代码

译码中是用基二算法实现的，运行时首先要在c盘中建立一个输入文件和一个输出文件。-This is the [2,1,7] viterbi encoding and decoding of the c language code decoding is to use the base implementation of the second algorithm, run-time we must first set up in c after a input file and an output file.