程序代码：

#include"stdio.h"
#define NULL 0
main()
{
struct student
{

 char *name;

 int num;

 int tel;

 struct student *next;

 };

 int c;
struct student a,b,*head,*p;

 a.name="qqq",a.num=17,a.tel=61334;

 b.name="sss",b.num=12,b.tel=654312;

 head=&a;a.next=&b;b.next=NULL,p=head;

 printf("please intput student num\n");

 scanf("%d",&c);

 while(p->num!=c&&p->next!=NULL)

 {p=p->next;}

 printf("%c\t\t%d",p->name,p->tel);

 getch();

 }