程序代码：

#include<stdio.h>
#define NULL 0
struct stu
{ int num;
  int age;
  struct stu *next;
};
struct stu *creat(int n)
{ struct stu *head,*pf,*pd;
  int i;
  for(i=0;i<n;i++)
  { pd=(struct stu*)malloc(sizeof(struct stu));
    printf("input number and age:\n");
    scanf("%d%d",&pd->num,&pd->age);
    if(i==0){
    head=pd;
    pf=head;}
    else
    pf->next=pd;
    pd->next=NULL;
    pf=pd;
  }
  head->data=n;
  return head;
}
void main()
{ struct stu *student;
  int i,count=6;
  student=creat(count);
  printf("num:\t   age:\t\n");
  for(i=0;i<6;i++){
    printf("%d  \t\t%d\n",student->num,student->age);
  }
}