跪求：怎样对单链表排序。（求例题）。拜托各位大虾！

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct tag_student
{
    char name[8];
    struct tag_student *next;
}student;
void list_sort(student *head)
{
    student *p = head;
    while(NULL != p->next)
    {
        student *q = p->next;
        while(q)
        {
            if(strcmp(p->name, q->name) > 0)
            {
                char tmp[8];
                strcpy(tmp, p->name);
                strcpy(p->name, q->name);
                strcpy(q->name, tmp);
            }
            q = q ->next;
        }
        p = p->next;
    }
}
int main()
{
    student headNode; //头结点
    student *p= &headNode; // 头指针,头指针指向头结点，头节点的next指向的是第一个节点
    for(int i = 0; i != 5; ++i)
    {
        p->next = (student *)malloc(sizeof(student));
        p = p->next;
        p->next = NULL;
        scanf("%s", p->name);
    }
    list_sort(headNode.next);
    p= headNode.next;
    while(p)
    {
        printf("%s ", p->name);
        p =p->next;
    }
}