jisuanmodlg.cpp

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// JisuanMoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "JisuanMoDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CJisuanMoDlg dialog

CJisuanMoDlg::CJisuanMoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CJisuanMoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CJisuanMoDlg)
	m_dwB = 0;
	m_dwM = 0;
	m_dwN = 0;
	m_dwResult = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CJisuanMoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CJisuanMoDlg)
	DDX_Text(pDX, IDC_B, m_dwB);
	DDX_Text(pDX, IDC_M, m_dwM);
	DDX_Text(pDX, IDC_N, m_dwN);
	DDX_Text(pDX, IDC_RESULT, m_dwResult);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CJisuanMoDlg, CDialog)
	//{{AFX_MSG_MAP(CJisuanMoDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_COMPUTER, OnComputer)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CJisuanMoDlg message handlers

BOOL CJisuanMoDlg::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 CJisuanMoDlg::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 CJisuanMoDlg::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 CJisuanMoDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CJisuanMoDlg::OnComputer() 
{
	// TODO: Add your control notification handler code here
	DWORD	b;
	DWORD	m;
	DWORD	n;
	DWORD  a=1;

	UpdateData(true);
	b = m_dwB;
	n = m_dwN;
	m = m_dwM;

	TransDtoB(n);//Trans n to n=n0*2**0+n1*2**1+n2*2**2+...+nK*2**K

	int j = bLength;
	int i = j;
	while(j>1)
	{
    	if(nB[i-j])//if nB[i] == 1 
			a = a*b%m;
		b = (b*b)%m;
		j--;
	}
	a = a*b%m;

	m_dwResult = a;
	UpdateData(false);
}

void CJisuanMoDlg::TransDtoB(int coeN)
{
	DWORD q=-1;
	DWORD r=-1;
	DWORD n;
	n = coeN;
	int i=0;

	do
	{
		q = n/2;
		r = n - q*2;
		nB[i] = r;
		n = q;
		i++;
	}while(q!=0);//stop when q is 0,or go on

	bLength = i;
}