建立动态链表时出错
写了一个动态链表,但运行时显示vc遇错,需要关闭。
#include<stdio.h>
#include<malloc.h>
#define NULL 0
#define LEN sizeof(struct student)
struct student
{
long 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("%ld %f",&p1->num,&p1->score);
head=NULL;
while(p1->num!=0)
{
n=n+1;
if(n==1)
p1=head;
else
p2->next=p1;
p2=p1;
p1=(struct student *)malloc(LEN);
}
p2->next=NULL;
return(head);
}
void print (struct student *head)
{
struct student *p;
printf("\nThe records are:\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;
printf("Input the records:\n");
head=creat();
print(head);
}
不明白错在哪里,请教!