#include "stdio.h"?struct student? ? {? ? long num;? ? float score;? ? struct student * next;? ? };void main(){? ? struct student stu1,stu2,stu3;? ? struct student * head,*p;? ??? ? stu1.num=1;stu1.score=2;? ? stu2.num=2;stu2.score=2;? ? stu3.num=3;stu3.score=2;? ? head=&stu1;? ? stu1.next=&stu2;? ? stu2.next=&stu3;? ? stu3.next=NULL;? ? p=head;? ? while(p!=NULL){? ? printf("%d ?%d",p->num,p->score);? ? p=p->next;? ? }? ?}