关于结构体指针的问题，只看我发的图片就可以了

Question

#include "stdio.h"#include<malloc.h>#include<string.h>#include<ctype.h>#define LEN struct studentstruct student{ char name[22]; int Chinese; int Math; int English; struct student*next;};struct student*create(){ char ch;    struct student *head;    struct student*p1,*p2;    int a=0;    printf("是否输入新数据：\n");        while(toupper(ch=getchar())=='Y')    {      p1=(LEN*)malloc(sizeof(LEN));      printf("name:");      scanf("%s",&(*p1).name);      printf("Chinese:");      scanf("%d",&(*p1).Chinese);      printf("Math:");      scanf("%d",&(*p1).Math);      printf("English:");      scanf("%d",&(*p1).English);      getchar();//getchar吸收回车      printf("是否输入新数据：\n");      a++;      if(a==1)       head=p1;      else        (*p2).next=p1;      p2=p1;      p1->next=NULL;      }    return(head);}struct student * insert(struct student * head){    struct student *p0,*p1,*p2;    p0=(struct student * )malloc(sizeof(LEN));    printf("\n输入所要插入节点的数据：");    scanf("%ld,%f",&num,&score);    p1=head;    if(head==NULL)    {      head=p0;      p0->next=NULL;    }    else    if(p1->num>p0->num)    {    //p0->next=head;    head=p0;//可以删掉上一行吗，p0赋给head，    //p0->next不会自动指向下一个节点吗.因为p0包含了next       //不是吗    }    else    {    while(p1!=NULL)    {    if(p1->num<p0->num)    {    p2=p1;    p1=p1->next;    }    else    {    p0->next=p1;    p2->next=p0;    break;    }    }    if(p1->next=NULL;    {    p0->next=NULL;    p2->next=p0;    }        }    return(head);   }void print(struct student *head){ struct student *p; p=head; while(p!=NULL) { printf("\nname：%-8sChinese：%-5dMath：%-5 dEnglish：%-5d",p->name,p->Chinese,p->Math,p->English);//只是一个名 p=p->next;//测试随便输 }}void main( ){ //struct student *stu; //stu=create(); print(create());}