C语言数据结构关于链表的问题！！求大神求代码！！！题目如下

int Insert(Qlist *head, Qlist *New) /*按学号插入，根据实际情况修改，这里是把节点插入*/ { Qlist *p, *q, *Flag; q = New; p = head; if( p->next == NULL ) { q->next = p->next; p->next = q; Num_Of_People++; } else { Flag = p; p