(7，4)汉明码的编码程序，实现4位信息位后加三位监督位，组成(7,4) 汉明码,外加第三位附加位,组成８比特数据-(7,4) Hamming code encoding process, after the realization of four information bits plus three supervisory position, composition (7,4) Hamming code, plus the third additional bits, composed of