#define NULL 0  
#include <iostream>
struct Student
{ long num;
float score;
struct Student *next;
};
int main()
{ Student a,b,c,*head,*p;
a. num=31001; a.score=89.5;             //对结点a的num和score成员赋值
b. num=31003; b.score=90;               //对结点b的num和score成员赋值
c. num=31007; c.score=85;               //对结点c的num和score成员赋值
head=&a;                                //将结点a的起始地址赋给头指针head
a.next=&b;                              //将结点b的起始地址赋给a结点的next成员
b.next=&c;                              //将结点c的起始地址赋给b结点的next成员
c.next=NULL;                            //结点的next成员不存放其他结点地址
p=head;                                 //使p指针指向a结点
do      
{cout<<p->num<<"  "<<p->score<<endl;     //输出p指向的结点的数据
p=p->next;                              //使p指向下一个结点
} while(p!=NULL);                         //输出完c结点后p的值为NULL
return 0;
}
//这段代码运行不了，哪位大大能帮忙把它给弄运行啦