該樓層疑似違規已被系統折疊 隐藏此樓檢視此樓
這是一個建立有3個學生的單向動态連結清單，程式用的是譚浩強的書上的277頁的creat()函數和279頁的print()函數，運作出錯，求教高人解釋原因。
#include
#include
struct student
{long num;
float score;
struct student *next;
};
int n;
struct student *creat(void)
{
struct student *head,*p1,*p2;
n=0;
p1=p2=(struct student *)malloc(sizeof(struct student));
scanf("%ld,%f",&p1->num,&p1->score);
head=NULL;
while(p1->num!=0)
{
n++;
if(n==1)
head=p1;
else p2->next=p1;
p2=p1;
p1=(struct student *)malloc(sizeof(struct student));
scanf("%ld,%f",&p1->num,&p1->score);
}
p2->next=NULL;
return(head);
}
void print(struct student *head)
{
struct student *p;
printf("this %d records\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 *p;
p=creat();
print(p);
}