本程序是为了实现单向链表的就地逆置,主要功能：按照提示输入5个字母a－z-This procedure is to achieve a singly linked list in reverse, main functions: according to the prompt for five letters a to z

建立一个结点包括职工的编号,年龄和性别的单向链表,分别定义函数完成以下功能(Create a node includes the serial number of the worker, age and sex, singly linked list, respectively defined function to complete the following functions)