图书管理系统
在vs上第一次运行可以，但存入数据后，第二次运行就出现断点，


代码如下：
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
//书籍信息
typedef struct BookInfo
{
    char name[20];
    float price;
    int num;
}Info;

//书籍节点
typedef  struct BookNode
{
    Info date;
    struct BookNode* next;//链表
}Node;

//创建表头
Node* creatHeadNode(void)    //不做数据存储
{
    Node* HeadNode = (Node*)malloc(sizeof(Node));
    HeadNode->next = NULL;
    return HeadNode;
}
//创建节点
Node* creatNode(Info news)
{
    Node* NewNode = (Node*)malloc(sizeof(Node));
    NewNode->date = news;
    NewNode->next = NULL;
    return NewNode;
}

Node* List = NULL;//全局变量，表头

//打印书籍目录
void printList(Node* HeadNode)
{
    Node* tempNode = HeadNode->next;
    printf("书名\t\t价格\t\t数量\n");
    while (tempNode)
    {
        printf("%-12s %-12.1f %-12d\n", tempNode->date.name, tempNode->date.price, tempNode->date.num);
        tempNode = tempNode->next;
    }
}

//添加书籍
void AddnewBook(Info BookInfo, Node* HeadNode)
{
    Node* newNode = creatNode(BookInfo);
    newNode->next = HeadNode->next;
    HeadNode->next = newNode;
}
//删除书籍
void DeleteBook(Info deletebook, Node* HeadNode)
{
    Node* flont = HeadNode;
    Node* back = HeadNode->next;
    while (back && strcmp(deletebook.name, back->date.name) != 0)
    {
        flont = back;
        back = back->next;
    }
    if (back == NULL)
    {
        printf("图书系统无此书！\n");
    }
    else
    {
        flont->next = back->next;
        free(back);
        back = NULL;
    }
}
//写入文件(写操作）
void writeBookInfoTofile(Node* List)
{
    FILE* Pbook;
     fopen_s(&Pbook,"Book_store.txt", "w") ;
    Node* SecondNode = List->next;

    while (SecondNode)
    {
        fprintf(Pbook, "%12s %12.1f %12d\n", SecondNode->date.name, SecondNode->date.price, SecondNode->date.num);
        SecondNode = SecondNode->next;
    }
    fclose(Pbook);
}
//读取文件（读操作）
void ReadBookInfoTofile(Node* List)
{
    FILE* Pbook;
    Info tempInfo;
    fopen_s(&Pbook, "Book_store.txt", "r");

    if (Pbook == NULL)          //第一次，使用系统，文件一定不存在，创建一个
    {
        fopen_s(&Pbook, "Book_store.txt", "r");
    }
    while (fscanf_s(Pbook,"%12s %12.1f %d\n", tempInfo.name,20,&tempInfo.price,sizeof(float),&tempInfo.num,sizeof(int))!=EOF)
    {
        AddnewBook(tempInfo, List);
    }
    fclose(Pbook);
}
//图书操作界面
void  BookFace_group(void)
{
    printf(" \tXXX图书管理系统         \n");
    printf("*********************************\n");
    printf("*\t0->退出系统             *\n");
    printf("*\t1->查找书籍             *\n");
    printf("*\t2->删除书籍             *\n");
    printf("*\t3->借阅书籍             *\n");
    printf("*\t4->归还书籍             *\n");
    printf("*\t5->排序书籍             *\n");
    printf("*\t6->书籍清单             *\n");
    printf("*\t7->添加书籍             *\n");
    printf("*********************************\n");
}
//用户操作按键处理
void UserBykey(void)
{
    int key;
    Node* tempNode;
    Info tempInfo;
    scanf_s("%d", &key);
    switch (key)
    {
    case 0:
        printf("退出系统！\n");
        exit(0);
    case 1:
        printf("查找书籍\n");
        break;
    case 2:
        printf("删除书籍\n");
        scanf_s("%s", tempInfo.name, 20);
        DeleteBook(tempInfo, List);
        writeBookInfoTofile(List);
        printf("删除成功!\n");
        break;
    case 3:
        printf("借阅书籍\n");
        break;
    case 4:
        printf("归还书籍\n");
        break;
    case 5:
        printf("排序书籍\n");
        break;
    case 6:
        printf("书籍清单\n");
        printList(List);
        break;
    case 7:
        printf("添加书籍\n");
        scanf_s("%s %f %d", tempInfo.name, 20, &tempInfo.price, &tempInfo.num);
        AddnewBook(tempInfo, List);
        writeBookInfoTofile(List);
        printf("添加成功！\n");
        break;
    default:
        printf("非法输入，请重新输入！\n");
        UserBykey();
        break;
    }
}

int main()
{
    List = creatHeadNode();
    ReadBookInfoTofile(List);
    while (1)
    {
        BookFace_group();
        UserBykey();
        system("pause");
        system("cls");
    }
    return 0;
}




如照片所示问题，要怎么解决？

已解决！！！