实现8位自主线性反馈移位寄存器。自主线性反馈移位寄存器具有二进制的抽头（tap）系数C1，...,CN，这些系数决定Y（N）是否被反馈给寄存器的特定级。-Achieve 8-bit linear feedback shift register independently. Autonomous linear feedback shift register with binary tap (tap) coefficients C1 ,..., CN, these factors determine