錯誤很多，還需要多加練習啊
#include <stdio.h>
#include <malloc.h>
#define NULL0
#define LEN sizeof(struct student)
struct student
{
long num;
float score;
struct student *next;
};
int n; //全局變量
struct student *creat(void) //定義函數，帶回一個指向鏈表頭的指針
{
struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=(struct student *)malloc(LEN); //開辟一個新單元
scanf("%ld,%f",&p1->num,&p1->score);
head=NULL;
while(p1->num!=0)
{
n=n+1;
if(n==1)
head=p1;
else
p2->next=p1;
p2=p1;
p1=(struct student *)malloc(LEN);//不應該是p2
scanf("%ld,%f)",&p1->num,&p1->score);
}
p2->next=NULL;
return (head);
}

void print(struct student *head)
{
struct student *p;
printf("\nNow,these %d records are :\n",n);
p=head;
if(head!=NULL)
do
{
printf("%ld %5.1f\n",p->num,p->score);
p=p->next;
}while(p!=NULL);
}
main()
{ struct student *head;//struct stu筆誤吧應該
head = creat();//光調用怎么行
print(head);
}
希望對你能有所幫助。