关于MFC编计算器小数点要怎么实现
// ComputerDlg.cpp : implementation file//
#include "stdafx.h"
#include "Computer.h"
#include "ComputerDlg.h"
#include<math.h>
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
char sign=0;
double value;
int i=0;
/////////////////////////////////////////////////////////////////////////////
// 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()
/////////////////////////////////////////////////////////////////////////////
// CComputerDlg dialog
CComputerDlg::CComputerDlg(CWnd* pParent /*=NULL*/)
: CDialog(CComputerDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CComputerDlg)
m_num = 0.0;
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CComputerDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CComputerDlg)
DDX_Text(pDX, IDC_EDIT1, m_num);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CComputerDlg, CDialog)
//{{AFX_MSG_MAP(CComputerDlg)
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_BUTTONClean, OnBUTTONClean)
ON_BN_CLICKED(IDC_BUTTONadd, OnBUTTONadd)
ON_BN_CLICKED(IDC_BUTTONequ, OnBUTTONequ)
ON_BN_CLICKED(IDC_BUTTONreduce, OnBUTTONreduce)
ON_BN_CLICKED(IDC_BUTTONdiv, OnBUTTONdiv)
ON_BN_CLICKED(IDC_BUTTONmul, OnBUTTONmul)
ON_BN_CLICKED(IDC_BUTTONDel, OnBUTTONDel)
ON_BN_CLICKED(IDC_BUTTONsqrt, OnBUTTONsqrt)
ON_BN_CLICKED(IDC_BUTTONDel2, OnBUTTONDel2)
ON_BN_CLICKED(IDC_BUTTON10, OnButton10)
ON_BN_CLICKED(IDC_dian, Ondian)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CComputerDlg message handlers
BOOL CComputerDlg::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 CComputerDlg::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 CComputerDlg::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 CComputerDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CComputerDlg::OnButton0()
{
UpdateData(TRUE);
if (i++==0) //清零
m_num=0;
if (i>10) //限制最大只能输入10位数
UpdateData(false);
else
m_num=m_num*10;
UpdateData(false);
}
void CComputerDlg::OnButton1()
{
UpdateData(TRUE);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+1;
UpdateData(false);
}
void CComputerDlg::OnButton2()
{
UpdateData(TRUE);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+2;
UpdateData(false);
}
void CComputerDlg::OnButton3()
{
UpdateData(TRUE);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+3;
UpdateData(false);
}
void CComputerDlg::OnButton4()
{
UpdateData(TRUE);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+4;
UpdateData(false);
}
void CComputerDlg::OnButton5()
{
UpdateData(true);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+5;
UpdateData(false);
}
void CComputerDlg::OnButton6()
{
UpdateData(TRUE);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+6;
UpdateData(false);
}
void CComputerDlg::OnButton7()
{
UpdateData(TRUE);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+7;
UpdateData(false);
}
void CComputerDlg::OnButton8()
{
UpdateData(TRUE);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+8;
UpdateData(false);
}
void CComputerDlg::OnButton9()
{
UpdateData(TRUE);
if (i++==0)
m_num=0;
if (i>10)
UpdateData(false);
else
m_num=m_num*10+9;
UpdateData(false);
}
void CComputerDlg::OnBUTTONadd()
{
UpdateData(TRUE);
value=m_num;
sign='+';
i=0;
UpdateData(false);
}
void CComputerDlg::OnBUTTONreduce()
{
UpdateData(TRUE);
value=m_num;
sign='-';
i=0;
UpdateData(false);
}
void CComputerDlg::OnBUTTONdiv()
{
UpdateData(TRUE);
value=m_num;
sign='/';
i=0;
UpdateData(false);
}
void CComputerDlg::OnBUTTONmul()
{
UpdateData(TRUE);
value=m_num;
sign='*';
i=0;
UpdateData(false);
}
void CComputerDlg::OnBUTTONequ()
{
UpdateData(TRUE);
if (sign=='+')
m_num=value+m_num;
if (sign=='-')
m_num=value-m_num;
if (sign=='/')
m_num=value/m_num;
if (sign=='*')
m_num=value*m_num;
if (sign=='^')
m_num=value*m_num;
sign=0;
i=0;
UpdateData(false);
}
void CComputerDlg::OnBUTTONsqrt()
{
UpdateData(true);
m_num=sqrt(m_num);
i=0;
UpdateData(false);
}
void CComputerDlg::OnBUTTONClean()
{
UpdateData(TRUE);
m_num=0;
i=0;
sign=0;
UpdateData(false);
}
void CComputerDlg::OnBUTTONDel()
{
UpdateData(true);
if (i--==0)
{
m_num=0;
}
m_num=(m_num-(int)m_num%10)/10;
UpdateData(false);
}
void CComputerDlg::OnBUTTONDel2()
{
UpdateData(TRUE);
value=m_num;
sign='^';
i=0;
UpdateData(false);
// TODO: Add your control notification handler code here
}
void CComputerDlg::OnButton10()
{ UpdateData(true);
m_num=-1*m_num;
i=0;
UpdateData(false);
// TODO: Add your control notification handler code here
}
void CComputerDlg::Ondian()
{
// TODO: Add your control notification handler code here
}
555555...................
