#include "stdio.h"
#include "malloc.h"
#define NULL 0
struct student
{
    int num;
    int score;
    struct student *next;
};
int n;
struct student * create()//这个程序为什么不能够输入和输出，代码麻烦帮我修改一下？
{
    struct student a,b,c,*p,*head;
    p=(struct student *)malloc(sizeof(struct student));
    scanf("%d%d",&p->num,p->score);
    head=NULL;
    while(p->num=NULL)
    {
        n=n+1;
        if(n==1)
            head=p;
        else
            p->next=p;
        p=(struct student *)malloc(sizeof(struct student));
        scanf("%d%d",&p->num,&p->score);
    }
    p->next=NULL;
    return (head);
}

void print(struct student *head)
{
    struct student *p;
    printf("\nNow,These %d records are:\n",n);
    p=head;
    if(head!=NULL)
    {
        do
        {
            printf("%d%d\n",p->num,p->score);
            p=p->next;

        }while(p!=NULL);
    }
}
int main(int argc, char* argv[])
{
    struct student *head;
    head=create();
    print(head);
    return 0;
}