关于在c 语言里面的格式输入输出的问题

各位麻烦看看下面的程序，是利用链表输入输出成绩，但是在输入时出现了问题，请帮忙解决 #include <malloc.h> #define NULL 0 #define LEN sizeof(struct student) struct student { int num; int score ; struct student *next;

}; struct student creat (struct student *p) { struct student *p1;

p1=p; printf("please input the number\n"); scanf("%d %d\n",&p->num,&p->score);

if( (p->num)==0) {p->next=NULL; return; } else {p1=(struct student *)malloc(LEN); p->next=p1; creat(p1); } } void print(struct student *p) { if (p->num !=0) printf("num=%d,score=%d\n",p->num,p->score); if (p->next!=NULL) print(p->next); return; }

main() { struct student a; struct student *head;

head=&a; clrscr(); creat(head); printf("the record you input justnow is\n"); print(head); }

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什么样的问题
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