modify.cpp

数据结构大作业

// modify.cpp : implementation file
//

#include "stdafx.h"
#include "salsary.h"
#include "modify.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// modify dialog


modify::modify(CWnd* pParent /*=NULL*/)
	: CDialog(modify::IDD, pParent)
{
	//{{AFX_DATA_INIT(modify)
	m_name = _T("");
	m_age = _T("");
	//}}AFX_DATA_INIT
}


void modify::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(modify)
	DDX_Text(pDX, IDC_name, m_name);
	DDV_MaxChars(pDX, m_name, 10);
	DDX_Text(pDX, IDC_age, m_age);
	DDV_MaxChars(pDX, m_age, 10);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(modify, CDialog)
	//{{AFX_MSG_MAP(modify)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// modify message handlers
#include"wh.h"
#include"salsaryDlg.h"
BOOL modify::OnInitDialog() 
{
	CDialog::OnInitDialog();

	CSalsaryDlg*ptr=(CSalsaryDlg*)::AfxGetApp()->GetMainWnd();
fstream f("C:\\user.dat",ios::binary|ios::in|ios::out);
if(!f)
{cerr<<"文件不能打开"<<endl;
return FALSE;
}
user_data data;
f.seekp(0,ios::end);
long posEnd=f.tellp();
f.seekp(0,ios::beg);
CString user;
do
{f.read((char*)&data,sizeof(user_data));
user=data.user; 
}while((ptr->m_userID).Compare(user)&&f.tellp()!=posEnd);
if(!(ptr->m_userID).Compare(user))
{m_name=data.name;
 m_age.Format("%d",(data.age));
 UpdateData(FALSE);}
else MessageBox("程序出错!");
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void modify::OnButton1() 
{   int t=MessageBox("确定要进行修改?","注意!",4+32+256);
	if(t==6)
    {CSalsaryDlg*ptr=(CSalsaryDlg*)::AfxGetApp()->GetMainWnd();
	UpdateData();
fstream f("C:\\user.dat",ios::binary|ios::in|ios::out);
if(!f)
{cerr<<"文件不能打开"<<endl;
return ;
}
user_data data;
f.seekp(0,ios::end);
long posEnd=f.tellp();
f.seekp(0,ios::beg);
CString user;
do
{f.read((char*)&data,sizeof(user_data));
user=data.user; 
}while((ptr->m_userID).Compare(user)&&f.tellp()!=posEnd);
if(!((ptr->m_userID).Compare(user)))
{strcpy((data.name),(LPSTR)(LPCTSTR)(m_name));
(data.age)=atoi(m_age);
f.seekp(-long(sizeof(user_data)),ios::cur);//文件指针复位
f.write((char*)&data,sizeof(user_data));
MessageBox("修改用户资料成功!");	
f.close();	
}	// TODO: Add your control notification handler code here
	
}}

void modify::OnButton2() 
{
EndDialog(1);	// TODO: Add your control notification handler code here
	
}