说明：  定义一个链表，其中的数组元素为结构体成员，结构体中的学生信息有学号、姓名、身高，还有用于存放下一结点的结构体指针。然后定义在其上操作的函数，有在首部插入结点、在尾部插入结点、在某一个结点前插入结点、删除指定的结点、删除全部结点、修改指定结点的数据部分、显示全部结点信息、按照结构体结点中某一个数据项对链表进行排序。从主函数开始执行，输入数据，选择执行操作的类型，进入到各个函数中执行相应的操作，执行完毕后，返回主函数，结束程序的运行。
(Define a linked list, in which the elements of an array as a member of the structure, the structure of student information school, name, height, as well as the structure used to store the next node pointer. And then define its on the operation of the function, there in the first insertion junction points, at the tail insert node before a node insert node, delete the specified node, delete all the junction points, modify the specified junction point of the data part , show all node information, to be sorted in accordance with a data item in the structure body node of the list. Started from the main function, enter data, select the type of the implementation of the operation into the various functions perform the appropriate action, after the execution, return to the main function, the end of the program run.)