1 #include "head.h"
 2 struct Student *del_same_age(struct Student*head, int age)
 3 {
 4     struct Student *p, *pt; int find = 0;
 5     p = pt = head;
 6     while (p != NULL)／／当循环到最后一个节点时
 7     {
 8 
 9         if (p->stu_age == age)／／如果相等
10         {
11             find++;　／／说明找到了
12             if (p == head)／／如果找到是头结点
13             {
14                 head = p->next;
15                 p = p->next;／／循环节点后移
16                 pt = p;
17             }
18             else／／如果不是头结点
19             {
20                 pt->next = p->next;
21                 p = p->next;
22             }
23         }
24         else／／如果没有找到
25         {
26             pt = p;
27             p = p->next;／／循环节点后移
28         }
29     }
30     if (!find)／／如果循环下来没有找到节点
31         printf("not found %d", age);
32     return head;
33 }