struct LNode *Creat(viod){
struct LNode *head;
struct LNode *p1,*p2;
int n=0;
p1=p2=(struct LNode *)malloc(LEN);
scanf("%d,%d",&p1->num,&p1->digit);
head=NULL;
while(p1->num!=0){
n=n+1;
if(n==1)head=p1;
else p2->next=p1;
p2=p1;
p1=(struct LNode *)malloc(LEN);
scanf("%d,%d",&p1->num,&p1->digit);
}
p2->next=head;
return head;
}
