为充分利用向量空间，克服"假上溢"现象的方法是：将向量空间想象为一个首尾相接的圆环，并称这种向量为循环向量。存储在其中的队列称为循环队列-To take full advantage of vector space, to overcome the phenomenon of false overflow method is: to imagine as a vector space both phase Circle, saying such a vector for the vector c