#include "stdlib.h"
#include "stdio.h"
#define NULL 0
#define LEN sizeof(struct student)
struct student
{
long num;
float score;
struct student *next;
};
int n;
struct student *creat()
{
struct student *head;
struct student *p1,*p2;
n=0;
p1=p2=(struct student * )malloc(LEN);
scanf("%ld,%f",&p1->num,&p1->score); /*为什么这里出问题了？*/
getch();
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,%f",&p1->num,&p1->score);
}
p2->next=NULL;
return (head);
}
void print (head)
struct student *head;
{
struct student *p;
printf ("\nNow, These %d records are :\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 *head;
head=creat();
print(head);
getch();
return 0;
}
为什么这个程序会出问题？？？
