为什么会出现死循环？
看代码
程序代码：#include <stdio.h>
#include <stdlib.h>
#define N 3
struct student
{
char number[12];
char name[10];
float score[N];
struct student *next;
};
int main(void)
{
struct student *creat();
void print(struct student *head);
struct student *head;
head=creat();
print(head);
return 0;
}
//创建链表
struct student *creat()
{
struct student *head;
struct student *p1, *p2;
int n, i;
p1=p2=(struct student *)malloc(sizeof(struct student));
printf("Please input student's number:");
scanf("%s", p1->number);
printf("Please input student's name:");
scanf("%s", p1->name);
printf("Please input %d 门 score:", N);
for(i=0; i<N; i++)
{
scanf("%f", &p1->score[i]);
}
head=NULL;
while(p1->number != 0)
{
n += 1;
if(1==n)
{
head=p1;
}
else
{
p2->next=p1;
}
p2=p1;
p1=(struct student *)malloc(sizeof(struct student));
printf("Please input student's number:");
scanf("%s", p1->number);
printf("please input student's name:");
scanf("%s", p1->name);
printf("Please input student's %d 门score:", N);
for(i=0; i<N; i++)
{
scanf("%f", &p1->score[i]);
}
p2->next=p1;
p2=p1;
}
p2->next=NULL;
return head;
}
//打印链表
void print(struct student *head)
{
int i;
struct student *p1;
p1=head;
printf("number\tname\t");
for(i=0; i<N; i++)
{
printf("score%d\t", i+1);
}
printf("\n");
while(p1 != NULL)
{
printf("%s%s", p1->number, p1->name);
for(i=0; i<N; i++)
{
printf("%3.1f\t", p1->score[i]);
}
printf("\n");
p1=p1->next;
}
}如何修改!
