我的第一个链表

#include <stdio.h>
#include<windows.h>
#include <stdlib.h>
struct student
{
    char name[20];
    int num;
    int age;
};
struct Node
{
    struct student data;
    struct Node* next;
};
struct Node* creatlist()  //创建链表表头
{
    struct Node* headNode=(struct Node*)malloc(sizeof(struct Node));   //申请内存
    //headNode->data=1;
    headNode->next=NULL;  //指针初始化
    return headNode;
};
struct Node* creatNode(struct student data)  //创立新的节点
{
    struct Node* newNode=(struct Node*)malloc(sizeof(struct Node));
    newNode->data=data;
    newNode->next=NULL;
    return newNode;
}
void printlist(struct Node*headNode)  //打印链表内容
{
    struct Node*pmove=headNode->next;
    printf("姓名\t语文\t数学\n");
    while(pmove)
    {
        printf("%s\t%d\t%d\n",pmove->data.name,pmove->data.num,pmove->data.age);
        pmove=pmove->next;
    }
}
void insert(struct Node*headNode,struct student data)      //头部插入
{
    struct Node* newNode=creatNode(data);
    newNode->next=headNode->next;
    headNode->next=newNode;
}
/*
void insert(struct Node* headNode,struct stuednt data)
{
    struct Node* newNode=creatNode(data);
    newNode->next=headNode->next;
    headNode->next=newNode;
*/
void insertbypos(struct Node*headNode,struct student data,int posdata) //指定位置插入
{
    struct Node* posNode=headNode->next;
    struct Node* preposNode=headNode;
    while(posNode->data.num!=posdata)
    {
        preposNode=posNode;
        posNode=preposNode->next;
        if(posNode == NULL)
        {
            return;

        }
    }
    struct Node* newNode=creatNode(data);
    newNode->next=posNode->next;
    posNode->next=newNode;
}
void insertbytail(struct Node* headNode,struct student data)    //尾部插入
{
    struct Node* newNode=creatNode(data);
    struct Node* tail=headNode;
    while(tail->next!=NULL)
    {
        tail=tail->next;
    }
    tail->next=newNode;
}
void delet(struct Node* headNode,int posdata)   //指定位置删除数据
{
    struct Node* posNode=headNode->next;
    struct Node* preposNode=headNode;
    while(posNode->data.num!=posdata)
    {
        preposNode=posNode;
        posNode=preposNode->next;
        if(posNode == NULL)
        {
            return;

        }
    }
    preposNode->next=posNode->next;
    free(posNode);
}
int main()
{
    struct Node* list=creatlist();
    struct student info;
    int n;
    printf("请输入学生个数：");
    scanf("%d",&n);
    while(n--)
    {
        printf("依次输入学生姓名，语文成绩，数学成绩\n");
        scanf("%s%d%d",info.name,&info.num,&info.age);
        insert(list,info);
    }
    //Sleep(2000);
    printlist(list);
    return 0;
}