mycalculatordlg.cpp

经典C++书籍钱能C++书籍例子代码实例

// MyCalculatorDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MyCalculator.h"
#include "MyCalculatorDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMyCalculatorDlg dialog

CMyCalculatorDlg::CMyCalculatorDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMyCalculatorDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMyCalculatorDlg)
	m_display = _T("0.0");
	m_first = 0.0;
	m_second= 0.0;
	m_operator=_T("+");
	m_coff  = 1.0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMyCalculatorDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMyCalculatorDlg)
	DDX_Control(pDX, IDC_BUTTON8, m_8);
	DDX_Text(pDX, IDC_DISPLAY, m_display);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMyCalculatorDlg, CDialog)
	//{{AFX_MSG_MAP(CMyCalculatorDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON0, OnButton0)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
	ON_BN_CLICKED(IDC_BUTTON4, OnButton4)
	ON_BN_CLICKED(IDC_BUTTON5, OnButton5)
	ON_BN_CLICKED(IDC_BUTTON6, OnButton6)
	ON_BN_CLICKED(IDC_BUTTON7, OnButton7)
	ON_BN_CLICKED(IDC_BUTTON8, OnButton8)
	ON_BN_CLICKED(IDC_BUTTON9, OnButton9)
	ON_BN_CLICKED(IDC_BUTTON_SQRT, OnButtonSqrt)
	ON_BN_CLICKED(IDC_BUTTON_SIGN, OnButtonSign)
	ON_BN_CLICKED(IDC_BUTTON_MUTIPLY, OnButtonMutiply)
	ON_BN_CLICKED(IDC_BUTTON_MINUS, OnButtonMinus)
	ON_BN_CLICKED(IDC_BUTTON_EQUAL, OnButtonEqual)
	ON_BN_CLICKED(IDC_BUTTON_DIV, OnButtonDiv)
	ON_BN_CLICKED(IDC_BUTTON_CLEAR, OnButtonClear)
	ON_BN_CLICKED(IDC_BUTTON_ADD, OnButtonAdd)
	ON_BN_CLICKED(IDC_BUTTON_RECIPROCAL, OnButtonReciprocal)
	ON_BN_CLICKED(IDC_BUTTON_POINT, OnButtonPoint)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyCalculatorDlg message handlers

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

void CMyCalculatorDlg::OnButton0() 
{
	if( m_coff == 1.0)
		m_second = m_second*10 + 0;
	else  
		{m_second = m_second + 0*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);

}

void CMyCalculatorDlg::OnButton1() 
{
	if( m_coff == 1.0)
		m_second = m_second*10 + 1;
	else  
		{m_second = m_second + 1*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);

}

void CMyCalculatorDlg::OnButton2() 
{	if( m_coff == 1.0)
		m_second = m_second*10 + 2;
	else  
		{m_second = m_second + 2*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);

}

void CMyCalculatorDlg::OnButton3() 
{	if( m_coff == 1.0)
		m_second = m_second*10 + 3;
	else  
		{m_second = m_second + 3*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);

}

void CMyCalculatorDlg::OnButton4() 
{
	if( m_coff == 1.0)
		m_second = m_second*10 + 4;
	else  
		{m_second = m_second + 4*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);

}

void CMyCalculatorDlg::OnButton5() 
{
    if( m_coff == 1.0)
		m_second = m_second*10 + 5;
	else  
		{m_second = m_second + 5*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);
	
}

void CMyCalculatorDlg::OnButton6() 
{
	if( m_coff == 1.0)
		m_second = m_second*10 + 6;
	else  
		{m_second = m_second + 6*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);

}

void CMyCalculatorDlg::OnButton7() 
{   if( m_coff == 1.0)m_second = m_second*10 + 7;
	else  {m_second = m_second + 7*m_coff; m_coff *= 0.1;}
	UpdateDisplay(m_second);

}

void CMyCalculatorDlg::OnButton8() 
{	  //m_8.SetCheck(0);return;

	if( m_coff == 1.0)
		m_second = m_second*10 + 8;
	else  
		{m_second = m_second + 8*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);
}

void CMyCalculatorDlg::OnButton9() 
{
	if( m_coff == 1.0)
		m_second = m_second*10 + 9;
	else  
		{m_second = m_second + 9*m_coff; 
		m_coff *= 0.1;
	}

	UpdateDisplay(m_second);
}

void CMyCalculatorDlg::OnButtonSqrt() 
{
    m_second = sqrt(m_second);
	UpdateDisplay(m_second);
	
}

void CMyCalculatorDlg::OnButtonSign() 
{
    m_second = -m_second;	 
	UpdateDisplay(m_second);
}

void CMyCalculatorDlg::OnButtonMutiply() 
{   Calculate(); 
    m_operator="*";
	
}

void CMyCalculatorDlg::OnButtonMinus() 
{
    Calculate(); 
    m_operator="-";

}

void CMyCalculatorDlg::OnButtonEqual() 
{
	Calculate(); 
	
	m_first  = 0.0;
    m_operator="+";

}

void CMyCalculatorDlg::OnButtonDiv() 
{ Calculate(); 
  m_operator.Format("%s","/");
  
}

void CMyCalculatorDlg::OnButtonClear() 
{   m_first=0.0;
	m_second=0.0;
	m_operator = "+";
	m_coff = 1.0;
	UpdateDisplay(0.0);

}

void CMyCalculatorDlg::OnButtonAdd() 
{	//m_8.SetState(1);//Capture();SetCheck(1);//;return;
	Calculate(); 
    m_operator="+";
}

void CMyCalculatorDlg::Calculate(void)
{
	switch(m_operator.GetAt(0))
	{
	case '+':
		m_first +=m_second;break;
	case '-':
		m_first -=m_second;break;
	case '*':
		m_first *=m_second;break;
	case '/':
		if(fabs(m_second)<= 0.000001)
		{  m_display = "除数不能为零";
		   UpdateData(false);
		  return;
		}
		m_first /=m_second;break;
	}
	m_second=0.0;
	m_coff = 1.0;
	UpdateDisplay(m_first);
}
void CMyCalculatorDlg::UpdateDisplay(double lVal)
{
	m_display.Format( _T("%f"),lVal);
	int i=m_display.GetLength();
	//格式化输出，将输出结果后的零全部截去
	while(m_display.GetAt(i-1)=='0')
	{m_display.Delete(i-1,1);i--;}
	UpdateData(false); //更新显示编辑框变量m_display
}		

void CMyCalculatorDlg::OnButtonReciprocal() 
{
	if(fabs(m_second)<0.000001)
	{m_display = "除数不能为零";
	 UpdateData(false);
	 return;
	}

    m_second= 1.0/m_second;
	UpdateDisplay(m_second);	
}

void CMyCalculatorDlg::OnButtonPoint() 
{
     m_coff	= 0.1 ;
	
}