#include<iostream>
#include<stdlib.h>
#include<cstdlib.h>
#define NULL 0
using namespace std;
struct student
{
       int num;
       //char name[10];
       int score;
       struct student * next;
};
int main()
{
    struct student a,b,c,* head,* p;
    a.num=1001; a.score=23;
    b.num=1002; b.score=56;
    c.num=1003; c.score=100;
    head=&a;
    a.next=&b;
    b.next=&c;
    c.next=NULL;
    head=p;
    do{
       printf("%-6ld%s\n",p->num,p->score);
       
       p=p->next;    
           }
     while(p!=NULL);           
           
    system("pause");
    return(0);
}