学生成绩管理

#include<stdio.h>#include<malloc.h>#include<string.h>#include<stdlib.h>#define NULL 0#define LEN sizeof(struct student)struct student{ int num; char name[10]; int score; struct student *next;};int n;struct student *creat(){ struct student *head; struct student *p1,*p2; p1=p2=(struct student *)malloc(LEN); printf("请输入数据:\n"); printf("-学号---姓名---成绩-\n"); scanf("%d%s%d",&p1->num,p1->name,&p1->score); head=NULL; n=0; while(p1->num!=NULL) { n=n+1; if(n==1) head=p1; else p2->next=p1; p2=p1;