#include "stdio.h"
#define NULL 0
struct student
{
    int num;
    float score;
    struct student *next;
};
struct student *body()
{
    struct student a,b,c,*head;
    a.num=1;
    a.score=89.5;
    b.num=2;
    b.score=90;
    c.num=3;
    c.score=78.5;
    head->next=&a;
    a.next=&b;
    b.next=&c;
    c.next=NULL;
    return(head);
}
void main()
{
    struct student *head, *p;
    head=body();
    p=head->next;
    while(p!=NULL)
    {   
        printf("%d %.2f\n",p->num,p->score);
        p=p->next;
        
    }
}

试过 还是不行

我是按《C 语言程序设计》（谭浩强）书的例题敲得 只是多了一个函数调用。郁闷啊！

谢谢了！