求助：小甲鱼C语言教学第57课链表的增加和删除代码问题

刘帆

1、小白一枚，全程跟甲鱼哥。
2、学习到链表时，照着打的，报错 incompatible types - from 'char [24]' to 'struct student *'
3、求修改意见。
4、谢谢大家。
5、代码如下，我把报错的地方标红了。
#include<stdio.h>
#include<malloc.h>
#include<stdlib.h>
#define LEN sizeof(struct student)//定义student结构的大小
struct student *creat();
struct student *del(struct student *head,int num);
struct student *insert (struct student *head,struct student *stu_2);
void print(struct student *head);

struct student
{
  int num;
  float score;
  struct student *next;
};
int n;

void main()
{
  struct student *stu,*p,stu_2;
  int n;

  stu = creat();
  p = stu;
  print(p);

  printf("\nplease input the number to delete:");
  scanf("%d",&n);
  print(del(p,n));

  printf("\nplease input the number to insert:");
  scanf("%d",&stu_2.num);
  print("please input the score");
  scanf("%f",&stu_2.score);

  p=insert(stu,&stu_2);
  print(p);

  printf("\n\n");
  system("pause");
}

/*****************************************/
struct student *creat()
(
  struct student *head;
  struct student *p1,*p2;
  p1=p2=(struct student *)malloc(LEN);

  printf("please enter the num");
  scanf("%d,"&p1->num);
  printf("please enter the score");
  scanf("%f,"&p1->score);

  head=NULL;
  n=0;

  while(p1->num!=0)
  {
    n++;
    if(n==1)
    {
      head=p1;
    }
    else
    {
      p2->next=p1;
    }
    p2=p1;

    p1=(struct student *)malloc(LEN);

    printf("please enter the num");
    scanf("%d,"&p1->num);
    printf("please enter the score");
    scanf("%f,"&p1->score);  
  }
  p2->next=NULL;
  return head;
)

/*****************************************/
struct student *del(struct student *head,int num)
{
  struct student *p1,*p2;
  if(head == NULL)
  {
    printf("\nthis list is null!!\n");
    goto END;
  }
  p1=head;
  while(p1->num!=num && p1->next!=NULL)
  {
    p2=p1;
    p1=p1->next;
  }
  if(p1->num == num)
  {
    if(p1==head)
    {
      head=p1->next;
    }
    else
    {
      p2->next=p1->next;
    }
    printf("\nDelete NO:%d succeed!\n",num);
    n=n-1;
  }
  else
  {
    printf("%d not been found!\n",num);
  }
END:
  return head;
}

/*****************************************/
struct student *insert (struct student *head,struct student *stu_2)
{
  struct student *p0,*p1,*p2;
  p1=head;
  p0=stu_2;
  if(head == NULL)
  {
    head=p0;
    po->next=NULL;
  }
  else
  {
    while((p0->num>p1->num) && (p1->next !=NULL))
    {
      p2=p1;//删除需要用p1的节点，所以用p2来保存
      p1=p1->next;
    }
    if(p0->num<=p1->num)
    {
      if(head == p1)
      {
        head=p0;
      }
      else
      {
        p2->next=p0;
      }
      p0->next=p1;
    }
    else
    {
      p1->next=p0;
      p0->next=NULL;
    }
  }
  n=n+1;
  return head;
}

/*****************************************/
void print(struct student *head)
{
  struct student *p;
  printf("\nthere are %d record!\n\n",n);
  p=head;
  if(head!=0)
  {
    do
    {
      printf("number is %d,the garde is %f\n",p->num,p->score);
      p=p->next;
    }while(p!=0);
  }
}

刘帆

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刘帆

求助求助各位大佬解惑

刘帆