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实现(7,4)CRC的编码和译码,其中生成多项式可以在程序中改成所需要的。输入4位码,可以编码生成7位循环码。译码的情况限于至多错一位的情形。-To achieve (7,4) cyclic code encoding and decoding, which generate the polynomials can be changed in the program need. Enter 4 yards, you can generate 7-bit cyclic code encoding. Limited to a maximum of decoding a wrong situation.