calculatordlg.cpp

这是一个用文法实现的计算器

// CalculatorDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Calculator.h"
#include "CalculatorDlg.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 };
	CXPButton	m_ok;
	//}}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)
	DDX_Control(pDX, IDOK, m_ok);
	//}}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_result = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
    m_value.GetFocus();
}

void CCalculatorDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCalculatorDlg)
	DDX_Control(pDX, IDC_BUTTON11, m_right);
	DDX_Control(pDX, IDC_BUTTON10, m_left);
	DDX_Control(pDX, IDC_B_clear, m_clear);
	DDX_Control(pDX, IDC_B_backspace, m_backspace);
	DDX_Control(pDX, IDC_BUTTON4, m_v4);
	DDX_Control(pDX, IDC_BUTTON9, m_v9);
	DDX_Control(pDX, IDC_BUTTON8, m_v8);
	DDX_Control(pDX, IDC_BUTTON7, m_v7);
	DDX_Control(pDX, IDC_BUTTON6, m_v6);
	DDX_Control(pDX, IDC_BUTTON5, m_v5);
	DDX_Control(pDX, IDC_BUTTON3, m_v3);
	DDX_Control(pDX, IDC_BUTTON2, m_v2);
	DDX_Control(pDX, IDC_BUTTON1, m_v1);
	DDX_Control(pDX, IDC_BUTTON0, m_v0);
	DDX_Control(pDX, IDC_B_val, m_value);
	DDX_Control(pDX, IDC_B_sub, m_sub);
	DDX_Control(pDX, IDC_B_mul, m_mul);
	DDX_Control(pDX, IDC_B_flo, m_flo);
	DDX_Control(pDX, IDC_B_div, m_div);
	DDX_Control(pDX, IDC_B_add, m_add);
	DDX_Text(pDX, IDC_EDIT1, m_result);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCalculatorDlg, CDialog)
	//{{AFX_MSG_MAP(CCalculatorDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_B_add, OnBadd)
	ON_BN_CLICKED(IDC_B_div, OnBdiv)
	ON_BN_CLICKED(IDC_B_flo, OnBflo)
	ON_BN_CLICKED(IDC_B_mul, OnBmul)
	ON_BN_CLICKED(IDC_B_sub, OnBsub)
	ON_BN_CLICKED(IDC_B_val, OnBval)
	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_B_clear, OnBclear)
	ON_BN_CLICKED(IDC_B_backspace, OnBbackspace)
	ON_BN_CLICKED(IDC_BUTTON10, OnButton10)
	ON_BN_CLICKED(IDC_BUTTON11, OnButton11)
	//}}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::OnBadd() 
{
	// TODO: Add your control notification handler code here
	m_result+="+";
	UpdateData(false);
}

void CCalculatorDlg::OnBdiv() 
{
	// TODO: Add your control notification handler code here
	m_result+="/";
	UpdateData(false);
}

void CCalculatorDlg::OnBflo() 
{
	// TODO: Add your control notification handler code here
	m_result+=".";
	UpdateData(false);
}

void CCalculatorDlg::OnBmul() 
{
	// TODO: Add your control notification handler code here
	m_result+="*";
	UpdateData(false);
}

void CCalculatorDlg::OnBsub() 
{
	// TODO: Add your control notification handler code here
	m_result+="-";
	UpdateData(false);
}

void CCalculatorDlg::OnBval() 
{
	// TODO: Add your control notification handler code here
	int length=m_result.GetLength();
	for(int i=0;i<length;i++)
		m_cal.input[i]=m_result.GetAt(i);
	m_cal.input[i]='\0';
	if(m_result=="")
		m_result="请输入计算式";
	else
	{
		m_cal.lookahead=m_cal.yylex();
		float result=m_cal.E();

		if(m_cal.m_strDisplay==" ERROR!!!")
			m_result=m_cal.m_strDisplay;
		else
			m_result.Format("%f",result);
	}
	UpdateData(false);

	m_result="";
	m_cal.init();
	
}

void CCalculatorDlg::OnButton0() 
{
	// TODO: Add your control notification handler code here
	m_result+="0";
	UpdateData(false);
}

void CCalculatorDlg::OnButton1() 
{
	// TODO: Add your control notification handler code here
	m_result+="1";
	UpdateData(false);
}

void CCalculatorDlg::OnButton2() 
{
	// TODO: Add your control notification handler code here
	m_result+="2";
	UpdateData(false);
}

void CCalculatorDlg::OnButton3() 
{
	// TODO: Add your control notification handler code here
	m_result+="3";
	UpdateData(false);
}

void CCalculatorDlg::OnButton4() 
{
	// TODO: Add your control notification handler code here
	m_result+="4";
	UpdateData(false);
}

void CCalculatorDlg::OnButton5() 
{
	// TODO: Add your control notification handler code here
	m_result+="5";
	UpdateData(false);
}

void CCalculatorDlg::OnButton6() 
{
	// TODO: Add your control notification handler code here
	m_result+="6";
	UpdateData(false);
}

void CCalculatorDlg::OnButton7() 
{
	// TODO: Add your control notification handler code here
	m_result+="7";
	UpdateData(false);
}

void CCalculatorDlg::OnButton8() 
{
	// TODO: Add your control notification handler code here
	m_result+="8";
	UpdateData(false);
}

void CCalculatorDlg::OnButton9() 
{
	// TODO: Add your control notification handler code here
	m_result+="9";
	UpdateData(false);
}

void CCalculatorDlg::OnBclear() 
{
	// TODO: Add your control notification handler code here
	m_result="";
	m_cal.init();
	UpdateData(false);
}

void CCalculatorDlg::OnBbackspace() 
{
	// TODO: Add your control notification handler code here
	int len=m_result.GetLength();
	m_result.Delete(len-1,1);
	UpdateData(false);
}

void CCalculatorDlg::OnButton10() 
{
	// TODO: Add your control notification handler code here
	m_result+="(";
	UpdateData(false);
}

void CCalculatorDlg::OnButton11() 
{
	// TODO: Add your control notification handler code here
	m_result+=")";
	UpdateData(false);
}