读写文件出现问题
我把关键的代码贴出来

C/C++ code

AddnewDlg.cpp// AddnewDlg.cpp : 实现文件//#include "stdafx.h"#include "Bookmanage.h"#include "AddnewDlg.h"#include "afxdialogex.h"#include "BookMessage.h"// CAddnewDlg 对话框IMPLEMENT_DYNAMIC(CAddnewDlg, CDialogEx)CAddnewDlg::CAddnewDlg(CWnd* pParent /*=NULL*/)    : CDialogEx(CAddnewDlg::IDD, pParent)    , bookid(0)    , publishid(0)    , authoroneid(0)    , authortwoid(0)    , authorthreeid(0)    , bookname(_T(""))    , publishname(_T(""))    , authoronename(_T(""))    , authortwoname(_T(""))    , authorthreename(_T("")){}CAddnewDlg::~CAddnewDlg(){}void CAddnewDlg::DoDataExchange(CDataExchange* pDX){    CDialogEx::DoDataExchange(pDX);    DDX_Text(pDX, IDC_EDIT1, bookid);    DDX_Text(pDX, IDC_EDIT3, publishid);    DDX_Text(pDX, IDC_EDIT6, authoroneid);    DDX_Text(pDX, IDC_EDIT5, authortwoid);    DDX_Text(pDX, IDC_EDIT7, authorthreeid);    DDX_Text(pDX, IDC_EDIT2, bookname);    DDX_Text(pDX, IDC_EDIT4, publishname);    DDX_Text(pDX, IDC_EDIT8, authoronename);    DDX_Text(pDX, IDC_EDIT10, authortwoname);    DDX_Text(pDX, IDC_EDIT9, authorthreename);}BEGIN_MESSAGE_MAP(CAddnewDlg, CDialogEx)    ON_BN_CLICKED(IDC_BUTTON1, &CAddnewDlg::OnBnClickedButton1)END_MESSAGE_MAP()// CAddnewDlg 消息处理程序void CAddnewDlg::OnBnClickedButton1(){    // TODO: 在此添加控件通知处理程序代码    UpdateData(true);    Book book;//创建Book对象进行添加    Book temp;//创建空对象写入文本末尾    fstream Hfdat("bookFile.dat",ios::in|ios::out|ios::binary );//以读、写方式打开    Hfdat.seekg(0,ios::beg);    do    {        Hfdat.read((char *)&book,sizeof(Book));         //读一个记录    }while(!endmark(book));    //判断是否结束标志    Hfdat.seekp(-long(sizeof(Book)),ios::cur);    //写指针位置    book.bookID=bookid;    book.bookName=bookname;    book.publishID=publishid;    book.publishName=publishname;    book.remainder=1;    book.total=1;    book.author1.authorID=authoroneid;    book.author1.authorName=authoronename;    if(authortwoid!=0){    book.author2.authorID=authortwoid;    book.author2.authorName=authortwoname;    }    if(authorthreeid!=0){    book.author3.authorID=authorthreeid;    book.author3.authorName=authorthreename;    }    Hfdat.write((char *)&book,sizeof(Book));    Hfdat.write((char *)&temp,sizeof(Book));    Hfdat.close();    MessageBox(L"添加成功",L"提示");    OnOK();}

C/C++ code

AddDlg.cpp// AddDlg.cpp : 实现文件//#include "stdafx.h"#include "Bookmanage.h"#include "AddDlg.h"#include "afxdialogex.h"#include "BookMessage.h"#include "AddnewDlg.h"// CAddDlg 对话框IMPLEMENT_DYNAMIC(CAddDlg, CDialogEx)CAddDlg::CAddDlg(CWnd* pParent /*=NULL*/)    : CDialogEx(CAddDlg::IDD, pParent)    , bookid(0){}CAddDlg::~CAddDlg(){}void CAddDlg::DoDataExchange(CDataExchange* pDX){    CDialogEx::DoDataExchange(pDX);    DDX_Text(pDX, IDC_EDIT1, bookid);}BEGIN_MESSAGE_MAP(CAddDlg, CDialogEx)    ON_BN_CLICKED(IDC_BUTTON1, &CAddDlg::OnBnClickedButton1)END_MESSAGE_MAP()// CAddDlg 消息处理程序void CAddDlg::OnBnClickedButton1(){    // TODO: 在此添加控件通知处理程序代码    UpdateData(true);    fstream Hfdat("bookFile.dat",ios::in|ios::out|ios::binary );//以读、写方式打开    Hfdat.seekg(0,ios::beg);         //2进制数据文件读指针移到文件头    Book book;    do    {        Hfdat.read((char *)&book,sizeof(Book));      //读一个数据    }while(book.bookID!=bookid&&!endmark(book));    //判断是否找到记录    if(book.bookID==bookid)    {                book.remainder++;        book.total++;        Hfdat.seekp(-long(sizeof(Book)),ios::cur);        Hfdat.write((char *)&book,sizeof(Book));        Hfdat.close();        MessageBox(L"已有书籍，增加库存量成功",L"提示");        OnOK();    }    else    {        Hfdat.close();        MessageBox(L"新书籍，请重新填写书籍信息",L"提示");        OnOK();        CAddnewDlg win;        win.DoModal();        }} 
 

C/C++ code

BookMessage.h//书籍类#include "afx.h"#include<fstream>#include<iostream>using namespace std;class Author{public:    int authorID;//作者ID号    CString authorName;//作者姓名    };class Book{public:    int bookID;//图书号    CString bookName;//图书名    int publishID;//出版社ID    CString publishName;//出版社名    int total;//总库存量    int remainder;//现存量    Author author1;//作者一信息    Author author2;//作者二信息    Author author3;//作者三信息         //构造函数     Book(){         bookID=0;         bookName="";         publishID=0;         publishName="";         total=0;         remainder=0;         author1.authorID=0;         author1.authorName="";         author2.authorID=0;         author2.authorName="";         author3.authorID=0;         author3.authorName="";                                 }};class Booklend{public:    int bookID;//图书号    int LendID;//借阅者ID    int year;//归还期限的年    int month;//归还期限的月    int day;//归还期限的日    Booklend(){            bookID=0;        LendID=0;         year=0;         month=0;         day=0;        }};int endmark(Book); //判断是否到达文件尾

C/C++ code

//endmark.cpp//判断是否录入空白纪录#include "StdAfx.h"#include"BookMessage.h"int endmark(Book book){    if(book.bookID==0)        return 1;    return 0;}

为什么每次我一添加成功以后好像二进制文件就坏了，等我下一次操作的时候直接程序无法运行下去，在线等，急急急！

[解决办法]
OnBnClickedButton1()中

do
{
Hfdat.read((char *)&book,sizeof(Book)); //读一个记录
}while(!endmark(book)); //判断是否结束标志
Hfdat.seekp(-long(sizeof(Book)),ios::cur); //写指针位置

初始为文件为空，seekp一个负值，会使fstream发生错误吧
[解决办法]
如果用文件流读写类，类中不要用CString保存字符串，改用数组