动态链表问题
程序代码:#include<stdio.h>
#include<malloc.h>
#define NULL 0
#define LEN sizeof(struct student)
int n=0;
struct student
{
long int num;
int score;
struct student *next;
};
struct student *create(void)
{
struct student *head;
struct student *p1,*p2;
p1=p2=(struct student*)malloc(LEN);
scanf("%ld,%d",&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);
scanf("%ld,%d",&p1->num,&p1->score);
}
p2->next=NULL;
return head;
}
int main(void)
{
struct student *head,*stu;
head=create();//创建第一个链表
stu=create();//创建第二个链表
print(head);//输出第一个链表
print(stu);//输出第二个链表
return 0;
}第二个链表无输出,why why why???







