#include<stdio.h> struct student{ int num; float score; struct student *next; } ; int main(void){ struct student stu1,stu2,stu3; /*定义3个struct student 类型的变量*/ struct student *head,*p;/*定义2个指向struct student的指针*/ stu1.num=18001;stu1.score=99.0; stu2.num=18002;stu2.score=91.0; stu3.num=18003;stu3.score=92.0; head = &stu1; stu1.next=&stu2; stu2.next=&stu3; stu3.next=NULL; p=head; do{ printf("%d%5.1f ",p->num,p->score); p=p->next; }while(p!=NULL); }