我哪儿错了??
#include <iostream.h>
#include <stdio.h>
#define NULL 0
#define LEN sizeof(struct student)
struct student
{int num;
float score;
struct student *next;
};
int n;
struct student *creat(void)
{struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=(struct student *)malloc(LEN);
scanf("%d,%f",&p1->num,&p2->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);
scanf("%d,%f",&p1->num,&p2->score);
}
p2->next=NULL;
return(head);
}