MFC计算器制作

MFC计算器制作 // Calc2Dlg.cpp : implementation file // #include "stdafx.h" #include "Calc2.h" #include "Calc2Dlg.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() ///////////////////////////////////////////////////////////////////////////// // CCalc2Dlg dialog CCalc2Dlg::CCalc2Dlg(CWnd* pParent /*=NULL*/) : CDialog(CCalc2Dlg::IDD, pParent) { //{{AFX_DATA_INIT(CCalc2Dlg) //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); m_operator1=0; m_operator2=0; m_Amd = 0; m_operator; } void CCalc2Dlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CCalc2Dlg) DDX_Control(pDX, IDC_OPERATOR2, m_edit2); DDX_Control(pDX, IDC_OPERATOR1, m_edit1); DDX_Control(pDX, IDC_OPERATOR, m_combox); DDX_Text(pDX, IDC_RESULT, m_result); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CCalc2Dlg, CDialog) //{{AFX_MSG_MAP(CCalc2Dlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_EN_CHANGE(IDC_OPERATOR1, OnChangeOperator1) ON_EN_CHANGE(IDC_OPERATOR2, OnChangeOperator2) ON_CBN_SELCHANGE(IDC_OPERATOR, OnSelchangeOperator) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CCalc2Dlg message handlers BOOL CCalc2Dlg::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 m_combox.SetCurSel(0); return TRUE; // return TRUE unless you set the focus to a control } void CCalc2Dlg::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 CCalc2Dlg::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 CCalc2Dlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CCalc2Dlg::OnChangeOperator1() { // TODO: If this is a RICHEDIT control, the control will not // send this notification unless you override the CDialog::OnInitDialog() // function and call CRichEditCtrl().SetEventMask() // with the ENM_CHANGE flag ORed into the mask. // TODO: Add your control notification handler code here m_edit1.GetWindowText(m_num1); /* int i=m_num1.GetLength(); char c1 = m_num1.GetAt(i-1); m_operator1 = c1-'0'; */ char *str1 = (LPSTR)(LPCTSTR)m_num1; m_operator1 = atof(str1);//double atof( const char *string ); // UpdateData(FALSE); 可以不要 } void CCalc2Dlg::OnChangeOperator2() { // TODO: If this is a RICHEDIT control, the control will not // send this notification unless you override the CDialog::OnInitDialog() // function and call CRichEditCtrl().SetEventMask() // with the ENM_CHANGE flag ORed into the mask. // TODO: Add your control notification handler code here m_edit2.GetWindowText(m_num2); /* int j=m_num2.GetLength(); char c2 = m_num2.GetAt(j-1); m_operator2 = c2-'0'; */ char *str2 = (LPSTR)(LPCTSTR)m_num2; m_operator2 = atof(str2); //double atof( const char *string ); // UpdateData(FALSE); 可以不要 } void CCalc2Dlg::OnSelchangeOperator() { // TODO: Add your control notification handler code here // m_operator = m_combox.SetCurSel(m_combox.GetCurSel()); 这个也行 m_operator = m_combox.GetCurSel(); //获取当前选中项的下标. switch(m_operator) { case 0: m_Amd = m_operator1 + m_operator2; break; case 1: m_Amd = m_operator1 - m_operator2; break; case 2: m_Amd = m_operator1 * m_operator2; break; case 3: if(0 == m_operator2) { m_result.Format("除数不能为0!"); UpdateData(FALSE); return; } m_Amd = m_operator1 / m_operator2; break; } m_result.Format("%f",m_Amd); UpdateData(FALSE); }