ex7_1dlg.cpp

C++计算器源码 C++计算器源码

// Ex7_1Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "Ex7_1.h"
#include "Ex7_1Dlg.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()

/////////////////////////////////////////////////////////////////////////////
// CEx7_1Dlg dialog

CEx7_1Dlg::CEx7_1Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CEx7_1Dlg::IDD, pParent)
{
	m_result=0;
    m_flag=1;
    m_flgOperate=0;
	//{{AFX_DATA_INIT(CEx7_1Dlg)
	m_data = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CEx7_1Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEx7_1Dlg)
	DDX_Text(pDX, IDC_EDIT1, m_data);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEx7_1Dlg, CDialog)
	//{{AFX_MSG_MAP(CEx7_1Dlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_ADD, OnAdd)
	ON_BN_CLICKED(IDC_B0, OnB0)
	ON_BN_CLICKED(IDC_B1, OnB1)
	ON_BN_CLICKED(IDC_B2, OnB2)
	ON_BN_CLICKED(IDC_B3, OnB3)
	ON_BN_CLICKED(IDC_B4, OnB4)
	ON_BN_CLICKED(IDC_B5, OnB5)
	ON_BN_CLICKED(IDC_B6, OnB6)
	ON_BN_CLICKED(IDC_B7, OnB7)
	ON_BN_CLICKED(IDC_B8, OnB8)
	ON_BN_CLICKED(IDC_B9, OnB9)
	ON_BN_CLICKED(IDC_DIV, OnDiv)
	ON_BN_CLICKED(IDC_EQUAL, OnEqual)
	ON_BN_CLICKED(IDC_MULTIPLY, OnMultiply)
	ON_BN_CLICKED(IDC_RESET, OnReset)
	ON_BN_CLICKED(IDC_SUBSTRACT, OnSubstract)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEx7_1Dlg message handlers

BOOL CEx7_1Dlg::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 CEx7_1Dlg::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 CEx7_1Dlg::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 CEx7_1Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CEx7_1Dlg::OnB0() 
{
	// TODO: Add your control notification handler code here
	PressNum(0);
}

void CEx7_1Dlg::OnB1() 
{
	// TODO: Add your control notification handler code here
	PressNum(1);
}

void CEx7_1Dlg::OnB2() 
{
	// TODO: Add your control notification handler code here
	PressNum(2);
}

void CEx7_1Dlg::OnB3() 
{
	// TODO: Add your control notification handler code here
	PressNum(3);
}

void CEx7_1Dlg::OnB4() 
{
	// TODO: Add your control notification handler code here
	PressNum(4);
}

void CEx7_1Dlg::OnB5() 
{
	// TODO: Add your control notification handler code here
	PressNum(5);
}

void CEx7_1Dlg::OnB6() 
{
	// TODO: Add your control notification handler code here
	PressNum(6);
}

void CEx7_1Dlg::OnB7() 
{
	// TODO: Add your control notification handler code here
	PressNum(7);
}

void CEx7_1Dlg::OnB8() 
{
	// TODO: Add your control notification handler code here
	PressNum(8);
}

void CEx7_1Dlg::OnB9() 
{
	// TODO: Add your control notification handler code here
	PressNum(9);
}

void CEx7_1Dlg::OnAdd() 
{
	// TODO: Add your control notification handler code here
	PressOperator(1);
}

void CEx7_1Dlg::OnSubstract() 
{
	// TODO: Add your control notification handler code here
	PressOperator(2);
}

void CEx7_1Dlg::OnMultiply() 
{
	// TODO: Add your control notification handler code here
	PressOperator(3);
}

void CEx7_1Dlg::OnDiv() 
{
	// TODO: Add your control notification handler code here
	PressOperator(4);
}

void CEx7_1Dlg::OnEqual() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	switch(m_flag)
	{
	case 1:m_result+=m_data;
		m_data=m_result;
		break;
	case 2:m_result-=m_data;
		m_data=m_result;
		break;
	case 3:m_result*=m_data;
		m_data=m_result;
		break;
	case 4:if(m_data==0)
		   {
			   AfxMessageBox("Cannot divide by zero");
			   m_result=0;
		   }
		else
		{
			m_result/=m_data;
			m_data=m_result;
		}
		break;
	}
	UpdateData(false);
	m_result=0;
	m_data=0;
	m_flgOperate=0;
	m_flag=1;
}

void CEx7_1Dlg::OnReset() 
{
	// TODO: Add your control notification handler code here
	m_result=0;
    m_data=0;
	m_flgOperate=0;
	m_flag=1;
	UpdateData(false);
}



void CEx7_1Dlg::PressNum(int num)
{
	if(m_flgOperate==1)
	{
		m_data=0;
		m_flgOperate=0;
	}
	m_data=m_data*10+num;
	UpdateData(false);
}

void CEx7_1Dlg::PressOperator(int n)
{
	if(m_flgOperate==0)
	{
		UpdateData(true);
		switch(m_flag)
		{
		case 1:m_result+=m_data;
			m_data=m_result;
			break;
		case 2:m_result-=m_data;
			m_data=m_result;
			break;
		case 3:m_result*=m_data;
			m_data=m_result;
			break;
		case 4:if(m_data==0)
			   {
				   AfxMessageBox("Cannot divide by zero");
				   m_result=0;
			   }
			   else
			   {
				   m_result/=m_data;
				   m_data=m_result;
			   }
			   break;
		}
	}
	m_flag=n;
	m_flgOperate=1;
	UpdateData(false);
}