写个猜数字小游戏，结果总有问题

[CoreTan]

// GuessNumDlg.h : header file
//

#if !defined(AFX_GUESSNUMDLG_H__524E87E4_778F_45E2_B3D9_71A5F55AC8A1__INCLUDED_)
#define AFX_GUESSNUMDLG_H__524E87E4_778F_45E2_B3D9_71A5F55AC8A1__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

/////////////////////////////////////////////////////////////////////////////
// CGuessNumDlg dialog

class CGuessNumDlg : public CDialog
{
// Construction
public:
	CGuessNumDlg(CWnd* pParent = NULL);	// standard constructor
	
	void InitGame();
	int m_Answer[4];


// Dialog Data
	//{{AFX_DATA(CGuessNumDlg)
	enum { IDD = IDD_GUESSNUM_DIALOG };
	CString	m_Show;
	int		m_num1;
	int		m_num2;
	int		m_num3;
	int		m_num4;
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CGuessNumDlg)
	public:
	virtual BOOL PreTranslateMessage(MSG* pMsg);
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	HICON m_hIcon;

	// Generated message map functions
	//{{AFX_MSG(CGuessNumDlg)
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	afx_msg void OncmdKey();
	afx_msg void OncmdReset();
	afx_msg void OncmdTry();
	afx_msg void OnChangetxtShow();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_GUESSNUMDLG_H__524E87E4_778F_45E2_B3D9_71A5F55AC8A1__INCLUDED_)

// GuessNumDlg.cpp : implementation file
//

#include "stdafx.h"
#include "GuessNum.h"
#include "GuessNumDlg.h"


#define N 4
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGuessNumDlg dialog

CGuessNumDlg::CGuessNumDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CGuessNumDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CGuessNumDlg)
	m_Show = _T("");
	m_num1 = 0;
	m_num2 = 0;
	m_num3 = 0;
	m_num4 = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CGuessNumDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CGuessNumDlg)
	DDX_Text(pDX, IDC_txtShow, m_Show);
	DDX_Text(pDX, IDC_EDIT1, m_num1);
	DDV_MinMaxInt(pDX, m_num1, 0, 9);
	DDX_Text(pDX, IDC_EDIT2, m_num2);
	DDV_MinMaxInt(pDX, m_num2, 0, 9);
	DDX_Text(pDX, IDC_EDIT3, m_num3);
	DDV_MinMaxInt(pDX, m_num3, 0, 9);
	DDX_Text(pDX, IDC_EDIT4, m_num4);
	DDV_MinMaxInt(pDX, m_num4, 0, 9);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CGuessNumDlg, CDialog)
	//{{AFX_MSG_MAP(CGuessNumDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_cmdKey, OncmdKey)
	ON_BN_CLICKED(IDC_cmdReset, OncmdReset)
	ON_BN_CLICKED(IDC_cmdTry, OncmdTry)
	ON_EN_CHANGE(IDC_txtShow, OnChangetxtShow)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGuessNumDlg message handlers

BOOL CGuessNumDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CGuessNumDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CGuessNumDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CGuessNumDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void InitGame()
{
	int i;

	for(i=0;i<N;i++)
		m_Answer[i]=(int)rand()%10;
	m_Show=" ";
	UpdateData(false);
}

void CGuessNumDlg::OncmdKey() 
{
	// TODO: Add your control notification handler code here
	int i;
	CString s;
	m_Show+="答案：";
	for (i=0;i<N;i++)
	{
		s.Format("%d",m_Answer[i]);
		m_Show+=s+"  ";
	}
	UpdateData(false);
	MessageBox("重新开始？");
	InitGame();
}

void CGuessNumDlg::OncmdReset() 
{
	// TODO: Add your control notification handler code here
	InitGame();
}

void CGuessNumDlg::OncmdTry() 
{
	// TODO: Add your control notification handler code here
	int Num[4];
	int A=0,B=0;
	int i,j;
	CString Stemp;

	UpdateData(true);
	Num[0]=m_num1;
	Num[1]=m_num2;
	Num[2]=m_num3;
	Num[3]=m_num4;

		for (i=0;i<N;i++)
		{
			if (Num[i]==m_Answer[i])
				A++;
			for(j=0;j<N;j++)
				if (Num[i]==m_Answer[j]&&i!=j)
					B++;
		}
		Stemp.Format("%d",A);
		m_Show+="  "+Stemp+"A";
		Stemp.Format("%d",B);
		m_Show+=Stemp+"B"+"\r\n";
		UpdateData(false);
		
		
		if (A==4)
		{
			m_Show+="你猜对了！";
			UpdateData(false);
			MessageBox("重新开始？");
			InitGame();
			return;
		}
		
	

}

void CGuessNumDlg::OnChangetxtShow() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	MessageBox("fda");
}

BOOL CGuessNumDlg::PreTranslateMessage(MSG* pMsg) 
{
	// TODO: Add your specialized code here and/or call the base class
	
	return CDialog::PreTranslateMessage(pMsg);
}

总是有以下错误：
error C2065: 'm_Answer' : undeclared identifier
error C2109: subscript requires array or pointer type
error C2106: '=' : left operand must be l-value
error C2065: 'm_Show' : undeclared identifier
error C2440: '=' : cannot convert from 'char [2]' to 'int'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
error C2065: 'UpdateData' : undeclared identifier

m_Answer 、m_Show都已在头文件中定义，总提示未定义。
UpdateData也是，请各位帮忙，下午就要给老师验收了

[Eleven]

void InitGame()
-->
void CGuessNumDlg::InitGame()

[CoreTan]

呃……非常感谢，我太大意了

[luciferisnotsatan]

void InitGame() // 应该是 void CGuessNumDlg::InitGame吧
{
int i;

for(i=0;i<N;i++)
m_Answer[i]=(int)rand()%10;
m_Show=" ";
UpdateData(false);
}