计算器dlg.cpp

这是一个科学计算器

// 计算器Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "计算器.h"
#include "计算器Dlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg dialog

CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMyDlg::IDD, pParent)
{
    m_cLast='0';  //表示刚刚输入的数字或操作符
	m_cLastOpr='=';  //表示上次输入的操作符
	m_nFraction=-1;  //小数点后的数字位数，－1表示无小数点
	m_nDigitLen=0;  //所输入数的位数
	m_dNumber=0; //正在输入的浮点数
	m_nSign=1;     //正负号
	m_dOperands[0]=0;  //操作数数组
	m_nOprldx=-1;     //操作符数组索引
	m_result.Empty();

	//{{AFX_DATA_INIT(CMyDlg)
	m_result = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

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

BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
	//{{AFX_MSG_MAP(CMyDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, On7)
	ON_BN_CLICKED(IDC_BUTTON2, On8)
	ON_BN_CLICKED(IDC_BUTTON3, On9)
	ON_BN_CLICKED(IDC_BUTTON4, Ondiv)
	ON_BN_CLICKED(IDC_BUTTON5, On4)
	ON_BN_CLICKED(IDC_BUTTON6, On5)
	ON_BN_CLICKED(IDC_BUTTON7, On6)
	ON_BN_CLICKED(IDC_BUTTON8, Onmul)
	ON_BN_CLICKED(IDC_BUTTON9, On1)
	ON_BN_CLICKED(IDC_BUTTON10, On2)
	ON_BN_CLICKED(IDC_BUTTON11, On3)
	ON_BN_CLICKED(IDC_BUTTON12, Onsub)
	ON_BN_CLICKED(IDC_BUTTON13, On0)
	ON_BN_CLICKED(IDC_BUTTON14, Onzf)
	ON_BN_CLICKED(IDC_BUTTON15, Onpoint)
	ON_BN_CLICKED(IDC_BUTTON16, Onadd)
	ON_BN_CLICKED(IDC_BUTTON17, Onequal)
	ON_BN_CLICKED(IDC_BUTTON18, OnBackspace)
	ON_BN_CLICKED(IDC_BUTTON19, OnCE)
	ON_BN_CLICKED(IDC_BUTTON20, Onsqrt)
	ON_BN_CLICKED(IDC_BUTTON21, Onsquare)
	ON_BN_CLICKED(IDC_BUTTON22, Oncb)
	ON_BN_CLICKED(IDC_BUTTON23, Onpi)
	ON_BN_CLICKED(IDC_BUTTON24, Onsin)
	ON_BN_CLICKED(IDC_BUTTON25, Oncos)
	ON_BN_CLICKED(IDC_BUTTON26, Ontan)
	ON_BN_CLICKED(IDC_BUTTON27, Onln)
	ON_BN_CLICKED(IDC_BUTTON28, Onlog)
	ON_BN_CLICKED(IDC_BUTTON29, Onexp)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg message handlers

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

void CMyDlg::Calculate()
{
	ASSERT(m_nOprldx<=2&&m_nOprldx>=-1);
	BYTE opr1,opr2;
	while(m_nOprldx>0)
	{
		opr1=m_cOprs[m_nOprldx-1];
        opr2=m_cOprs[m_nOprldx];
        if(Priority(opr1)>=Priority(opr2))
		{
			Operate(m_dOperands[m_nOprldx-1],m_dOperands[m_nOprldx],opr1);
            m_nOprldx--;
            m_cOprs[m_nOprldx]=opr2;
		}
		else break;
	}
}

int CMyDlg::Operate(double& d1,double d2,BYTE opr)
{   CString str;
	switch(opr)
	{
	case '+':d1=d1+d2;break;
    case '-':d1=d1-d2;break;
    case '*':d1=d1*d2;break;
    case '/':if(!d2) {printf("error!");return 0;}
			 else d1=d1/d2;
    	     str.Format("%g",d1);
		     break;
    default:return 0;
	}
	return 1;
}

int CMyDlg::Priority(BYTE opr)
{
	switch(opr)
	{
	case '*':
	case '/':return 2;
    case '+':
	case '-':return 1;
	case '=':return 0;
	default:return -1;

	}
}

void CMyDlg::DealDigit(int n) 
{
	CString tempStr;
	ASSERT(n>=-2&&n<=9);
	if(m_nDigitLen>=16&&n!=-1) return;
	if(n==-1) m_nSign*=-1;
	else if(n==-2){
		if(m_nFraction<0)
		{
			m_nFraction=0;
            m_nDigitLen++;
			m_result+='.';
		}
	}
	else {
		if(m_nFraction>=0) m_nFraction++;
        if(!(m_nFraction<0&&n==0&&m_nDigitLen==0))
        {
            m_nDigitLen++;
            if(m_nFraction>=0) m_dNumber+=n/pow(10,m_nFraction);
			else m_dNumber=m_dNumber*10+n;
			tempStr.Format("%d",n);
			m_result+=tempStr;
		}
        m_cLast='0'+n;
	}
	if(m_nSign==-1) m_result='-'+m_result;
	else if(m_result[0]=='-')  m_result=m_result-'-';
	UpdateData(FALSE);    //显示结果
}

void CMyDlg::DealOpr(BYTE opr)
{
	ASSERT(m_nOprldx>=-1&&m_nOprldx<2);
	ASSERT(opr=='+'||opr=='-'||opr=='*'||opr=='/'||opr=='=');
    if(m_nOprldx==0&&m_cOprs[0]=='=')
	{
		m_nOprldx=-1;
        m_cLast='0';
        m_dNumber=m_dOperands[0];
		m_nSign=1;
	}
	m_nOprldx++;
	m_cOprs[m_nOprldx]=opr;
    m_dOperands[m_nOprldx]=m_dNumber*m_nSign;
    m_dNumber=0;
    m_nSign=1;
    m_nDigitLen=0;
	m_result.Empty();
	Calculate();
	CString strTmp,s;
    strTmp.Format("%g",m_dOperands[m_nOprldx]);
	s=m_result;
	m_result=strTmp;
	UpdateData(FALSE);  //显示strTmp
    m_result=s;
	m_cLast=opr;
}

void CMyDlg::On7() 
{
	DealDigit(7);
	
}

void CMyDlg::On8() 
{
	DealDigit(8);
}

void CMyDlg::On9() 
{
	DealDigit(9);
}

void CMyDlg::Ondiv() 
{
	DealOpr('/');
}

void CMyDlg::On4() 
{
    DealDigit(4);
}

void CMyDlg::On5() 
{
    DealDigit(5);
}

void CMyDlg::On6() 
{
	DealDigit(6);
}

void CMyDlg::Onmul() 
{
	DealOpr('*');
}

void CMyDlg::On1() 
{
	DealDigit(1);
}

void CMyDlg::On2() 
{
    DealDigit(2);
}

void CMyDlg::On3() 
{
	DealDigit(3);
}

void CMyDlg::Onsub() 
{
	DealOpr('-');
	
}

void CMyDlg::On0() 
{
	DealDigit(0);
}

void CMyDlg::Onzf() 
{
    DealDigit(-1);
}

void CMyDlg::Onpoint() 
{
    DealDigit(-2);
}

void CMyDlg::Onadd() 
{
	DealOpr('+');
	
}

void CMyDlg::Onequal() 
{
	DealOpr('=');
}

void CMyDlg::OnBackspace() 
{
     if(!(m_nFraction<0&&m_nDigitLen==0))
     {
        m_nDigitLen--;
        if(m_nFraction>=0){ 
			m_dNumber=(int)(m_dNumber*pow(10,m_nFraction))/10;
	       	m_dNumber=m_dNumber/pow(10,m_nFraction-1);
		}
	    else m_dNumber=(int)m_dNumber/10;
		m_result.Format("%g",m_dNumber);
        m_nFraction--;
	}
	UpdateData(FALSE);   
}

void CMyDlg::OnCE() 
{   m_cLast='0';  
	m_cLastOpr='=';  
	m_nFraction=-1;  
	m_nDigitLen=0;  
	m_dNumber=0; 
	m_nSign=1;     
	m_dOperands[0]=0;  
	m_nOprldx=-1;     
    m_result='0';
	UpdateData(FALSE);	
	m_result.Empty();
}

void CMyDlg::Onsqrt() 
{
    if(m_nSign) {
		if(m_nOprldx==-1) {m_dNumber=sqrt(m_dNumber);m_dOperands[++m_nOprldx]=m_dNumber;}
        else m_dOperands[m_nOprldx]=sqrt(m_dOperands[m_nOprldx]);
        m_result.Format("%g",m_dOperands[m_nOprldx]);
    	UpdateData(FALSE);  
	}
}

void CMyDlg::Onsquare() 
{   m_nSign=1;
    if(m_nOprldx==-1) {m_dNumber*=m_dNumber;m_dOperands[++m_nOprldx]=m_dNumber;}
    else m_dOperands[m_nOprldx]*=m_dOperands[m_nOprldx];
    m_result.Format("%g",m_dOperands[m_nOprldx]);
    UpdateData(FALSE);  	
}

void CMyDlg::Oncb() 
{   if(m_nOprldx==-1) {m_dNumber=1/m_dNumber;m_dOperands[++m_nOprldx]=m_dNumber;}
    else m_dOperands[m_nOprldx]=1/m_dOperands[m_nOprldx];
    m_result.Format("%g",m_dOperands[m_nOprldx]);
    UpdateData(FALSE);  
}

void CMyDlg::Onpi() 
{   m_dOperands[++m_nOprldx]=m_dNumber=3.14159;	
	m_result.Format("%g",m_dOperands[m_nOprldx]);
    UpdateData(FALSE);  
}

void CMyDlg::Onsin() 
{	if(m_nOprldx==-1) {m_dNumber=sin(m_dNumber*3.1415926/180);m_dOperands[++m_nOprldx]=m_dNumber;}
    else m_dOperands[m_nOprldx]=sin(m_dOperands[m_nOprldx]*3.1415926/180);
    m_result.Format("%g",m_dOperands[m_nOprldx]);
    UpdateData(FALSE);  
}

void CMyDlg::Oncos() 
{	if(m_nOprldx==-1) {m_dNumber=cos(m_dNumber*3.1415926/180);m_dOperands[++m_nOprldx]=m_dNumber;}
    else m_dOperands[m_nOprldx]=cos(m_dOperands[m_nOprldx]*3.1415926/180);
    m_result.Format("%g",m_dOperands[m_nOprldx]);
    UpdateData(FALSE);  
}

void CMyDlg::Ontan() 
{	if(m_nOprldx==-1) {m_dNumber=tan(m_dNumber*3.1415926/180);m_dOperands[++m_nOprldx]=m_dNumber;}
    else m_dOperands[m_nOprldx]=tan(m_dOperands[m_nOprldx]*3.1415926/180);
    m_result.Format("%g",m_dOperands[m_nOprldx]);
    UpdateData(FALSE);  
}

void CMyDlg::Onln() 
{   if(m_nSign) {
	  if(m_nOprldx==-1) {m_dNumber=log(m_dNumber);m_dOperands[++m_nOprldx]=m_dNumber;}
      else m_dOperands[m_nOprldx]=log(m_dOperands[m_nOprldx]);
      m_result.Format("%g",m_dOperands[m_nOprldx]);
      UpdateData(FALSE);  
}
}

void CMyDlg::Onlog() 
{	if(m_nSign) {
    	if(m_nOprldx==-1) {m_dNumber=log10(m_dNumber);m_dOperands[++m_nOprldx]=m_dNumber;}
        else m_dOperands[m_nOprldx]=log10(m_dOperands[m_nOprldx]);
        m_result.Format("%g",m_dOperands[m_nOprldx]);
        UpdateData(FALSE);  
}
}

void CMyDlg::Onexp() 
{   if(m_nOprldx==-1) {m_dNumber=exp(m_dNumber);m_dOperands[++m_nOprldx]=m_dNumber;}
    else m_dOperands[m_nOprldx]=exp(m_dOperands[m_nOprldx]);
    m_result.Format("%g",m_dOperands[m_nOprldx]);
    UpdateData(FALSE);  

}