SNMP编程

开发平台：
Visual C++

CalculatorDlg.cpp：源码内容
							// CalculatorDlg.cpp : implementation file
//
#include "stdafx.h"
#include "Calculator.h"
#include "CalculatorDlg.h"
#include "math.h"
#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()
/////////////////////////////////////////////////////////////////////////////
// CCalculatorDlg dialog
CCalculatorDlg::CCalculatorDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCalculatorDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCalculatorDlg)
	m_number = 0.0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_NumberState=1;
}
void CCalculatorDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCalculatorDlg)
	DDX_Text(pDX, IDC_EDIT_PUTOUT, m_number);
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CCalculatorDlg, CDialog)
	//{{AFX_MSG_MAP(CCalculatorDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_COMMAND_RANGE(IDC_NUMBER1,IDC_NUMBER0,OnNumberKey)
	ON_COMMAND_RANGE(IDC_MINUS,IDC_RESULT,OnOperationKey)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CCalculatorDlg message handlers
BOOL CCalculatorDlg::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 CCalculatorDlg::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 CCalculatorDlg::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 CCalculatorDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
void CCalculatorDlg::OnNumberKey(UINT nID)
{
	int n=0;
	switch(nID)
	{
	case IDC_NUMBER1:
		n=1;
		break;
	case IDC_NUMBER2:
		n=2;
		break;
	case IDC_NUMBER3:
		n=3;
		break;
	case IDC_NUMBER4:
		n=4;
		break;
	case IDC_NUMBER5:
		n=5;
		break;
	case IDC_NUMBER6:
		n=6;
		break;
	case IDC_NUMBER7:
		n=7;
		break;
	case IDC_NUMBER8:
		n=8;
		break;
	case IDC_NUMBER9:
		n=9;
		break;
	case IDC_NUMBER0:
		n=0;
		break;
	}
	if(m_NumberState==1)
	{
		m_number=m_number*10+n;
		m_number1=m_number;
		UpdateData(FALSE);
	}
	else
	{
		m_number=m_number*10+n;
		m_number2=m_number;
		UpdateData(FALSE);
	}
}
void CCalculatorDlg::OnOperationKey(UINT nID)
{
	switch(nID)
	{
	case IDC_MINUS:
		m_number=-m_number;
		if(m_NumberState==1)
			m_number1=m_number;
		else
			m_number2=m_number;
		UpdateData(FALSE);
		break;
	case IDC_BACK:
		m_number=(int)m_number/10;
		if(m_NumberState==1)
			m_number1=m_number;
		else
			m_number2=m_number;
		UpdateData(FALSE);
		break;
	case IDC_DIVIDE:
		m_OperationState=1;
		m_number=0;
		UpdateData(FALSE);
		m_NumberState=2;
		break;
	case IDC_MULTIPLY:
		m_OperationState=2;
		m_number=0;
		UpdateData(FALSE);
		m_NumberState=2;
		break;
	case IDC_ADD:
		m_OperationState=3;
		m_number=0;
		UpdateData(FALSE);
		m_NumberState=2;
		break;
	case IDC_SUBTRACT:
		m_OperationState=4;
		m_number=0;
		UpdateData(FALSE);
		m_NumberState=2;
		break;
	case IDC_CLEAR:
		m_number1=m_number2=m_number=0;
		m_number=0;
		UpdateData(FALSE);
		m_NumberState=1;
		break;
	case IDC_SQRT:
		m_number1=m_number=sqrt(m_number1);
		UpdateData(FALSE);
		break;
	case IDC_RECIPROCAL:
		m_number1=m_number=(double) 1/m_number1;
		UpdateData(FALSE);
		break;
	case IDC_RESULT:
		cal();
		break;
	}
}
void CCalculatorDlg::cal()
{
	switch(m_OperationState)
	{
	case 1:
		m_number=(double)m_number1/m_number2;
		m_NumberState=1;
		UpdateData(FALSE);
		break;
	case 2:
		m_number=m_number1*m_number2;
		m_NumberState=1;
		UpdateData(FALSE);
		break;
	case 3:
		m_number=m_number1+m_number2;
		m_NumberState=1;
		UpdateData(FALSE);
		break;
	case 4:
		m_number=m_number1-m_number2;
		m_NumberState=1;
		UpdateData(FALSE);
		break;
	}	
	m_OperationState=0;
}
	

						