利用线性表数据结构设计并实现自己的通讯录管理-By using the linear table data structure design and the realization of his address book management

线性单链表长度.该程序实现的功能是：创建一个单链表，并且计算该链表的长度-Linear single-chain length. The function of the realization of the program are: to create a single list, and calculate the length of list