利用双向循环链表为主要存储结构，每个结点存储一个整形变量，按照中国对于长整数的习惯表示方法，将每四位存储在一个结点的值里面。-The use of two-way circulation list as the main storage structure, each node of a plastic storage variables, according to China for a long integer used to express the method to each of th