#include<stdio.h>
#include<stdlib.h>
#define NULL 0
#define TYPE struct stu
#define LEN sizeof(struct stu)
struct stu
{
    int age;
    struct stu *next;
};
TYPE *creat(int n)
{
    struct stu *head,*pb,*pf;
    int i;
    for(i=0;i<n;i++)
      {
          pb=(TYPE*)malloc(LEN);
          printf("input student imformation:");
          scanf("%d",&pb->age);
          if(i==0)
             pb=head=pf;
          else
             pf->next=pb;
             pb->next=NULL;
             pf=pb;
      }
    return(head);
}



看看哪地方出错了