MFC实现简易计算器.doc

MFC实现简易计算器Free Copy操作简便，还有帮助提示，支持double类型的数据进行运算，显示清除无效0.By: 杜运福 计算器类结构如下：class CCalculatorDlg : public CDialog/ Constructionpublic:CCalculatorDlg(CWnd* pParent = NULL);/ standard constructor/ Dialog Data/AFX_DATA(CCalculatorDlg)enum IDD = IDD_CALCULATOR_DIALOG ;doublem_Num;/AFX_DATAdouble num1,num2; /第一、二操作数char cal; /运算符号BYTE dotflag; /小数点标志BYTE numflag; /键入数字标志long quan2; /小数部分权值/ ClassWizard generated virtual function overrides/AFX_VIRTUAL(CCalculatorDlg)protected:virtual void DoDataExchange(CDataExchange* pDX);/ DDX/DDV support/AFX_VIRTUAL/ Implementationprotected:HICON m_hIcon;/ Generated message map functions/AFX_MSG(CCalculatorDlg)virtual BOOL OnInitDialog();afx_msg void OnSysCommand(UINT nID, LPARAM lParam);afx_msg void OnPaint();afx_msg HCURSOR OnQueryDragIcon();afx_msg void OnNum0();afx_msg void OnNum1();afx_msg void OnNum2();afx_msg void OnNum3();afx_msg void OnNum4();afx_msg void OnNum5();afx_msg void OnNum6();afx_msg void OnNum7();afx_msg void OnNum8();afx_msg void OnNum9();afx_msg void OnAdd();afx_msg void OnSub();afx_msg void OnMul();afx_msg void OnDiv();afx_msg void OnEqual();afx_msg void OnSign();afx_msg void OnInv();afx_msg void OnMod();afx_msg void OnSqrt();afx_msg void OnDot();afx_msg void OnClear();afx_msg void OnBackspace();afx_msg void OnHelp();/AFX_MSGDECLARE_MESSAGE_MAP();完整实现代码如下：/ CalculatorDlg.cpp : implementation file/* 简易计算器* by 追梦 2011-4-18*/#include stdafx.h#include Calculator.h#include CalculatorDlg.h#include math.h#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endif/ CAboutDlg dialog used for App Aboutclass CAboutDlg : public CDialogpublic: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/ Implementationprotected:/AFX_MSG(CAboutDlg)/AFX_MSGDECLARE_MESSAGE_MAP();CAboutDlg:CAboutDlg() : CDialog(CAboutDlg:IDD)/AFX_DATA_INIT(CAboutDlg)/AFX_DATA_INITvoid CAboutDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CAboutDlg)/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CAboutDlg, CDialog)/AFX_MSG_MAP(CAboutDlg)/ No message handlers/AFX_MSG_MAPEND_MESSAGE_MAP()/ CCalculatorDlg dialogCCalculatorDlg:CCalculatorDlg(CWnd* pParent /*=NULL*/): CDialog(CCalculatorDlg:IDD, pParent)/AFX_DATA_INIT(CCalculatorDlg)m_Num = 0.0;/AFX_DATA_INIT/ Note that LoadIcon does not require a subsequent DestroyIcon in Win32m_hIcon = AfxGetApp()-LoadIcon(IDR_MAINFRAME);void CCalculatorDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CCalculatorDlg)DDX_Text(pDX, IDC_Num, m_Num);/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CCalculatorDlg, CDialog)/AFX_MSG_MAP(CCalculatorDlg)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_Num0, OnNum0)ON_BN_CLICKED(IDC_Num1, OnNum1)ON_BN_CLICKED(IDC_Num2, OnNum2)ON_BN_CLICKED(IDC_Num3, OnNum3)ON_BN_CLICKED(IDC_Num4, OnNum4)ON_BN_CLICKED(IDC_Num5, OnNum5)ON_BN_CLICKED(IDC_Num6, OnNum6)ON_BN_CLICKED(IDC_Num7, OnNum7)ON_BN_CLICKED(IDC_Num8, OnNum8)ON_BN_CLICKED(IDC_Num9, OnNum9)ON_BN_CLICKED(IDC_Add, OnAdd)ON_BN_CLICKED(IDC_Sub, OnSub)ON_BN_CLICKED(IDC_Mul, OnMul)ON_BN_CLICKED(IDC_Div, OnDiv)ON_BN_CLICKED(IDC_Equal, OnEqual)ON_BN_CLICKED(IDC_Sign, OnSign)ON_BN_CLICKED(IDC_Inv, OnInv)ON_BN_CLICKED(IDC_Mod, OnMod)ON_BN_CLICKED(IDC_Sqrt, OnSqrt)ON_BN_CLICKED(IDC_Dot, OnDot)ON_BN_CLICKED(IDC_Clear, OnClear)ON_BN_CLICKED(IDC_Backspace, OnBackspace)ON_BN_CLICKED(IDC_Help, OnHelp)/AFX_MSG_MAPEND_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 AppendMenu(MF_SEPARATOR);pSysMenu-AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);/ Set the icon for this dialog. The framework does this automatically/ when the applications main window is not a dialogSetIcon(m_hIcon, TRUE);/ Set big iconSetIcon(m_hIcon, FALSE);/ Set small icon/ TODO: Add extra initialization herequan2 = 1;dotflag = 0;numflag = 0;return TRUE; / return TRUE unless you set the focus to a controlvoid CCalculatorDlg:OnSysCommand(UINT nID, LPARAM lParam)if (nID & 0xFFF0) = IDM_ABOUTBOX)CAboutDlg dlgAbout;dlgAbout.DoModal();elseCDialog: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 paintingSendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);/ Center icon in client rectangleint 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 icondc.DrawIcon(x, y, m_hIcon);elseCDialog: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;/键入 0void CCalculatorDlg:OnNum0() UpdateData();if(dotflag)quan2 *= 10;m_Num += 0 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 0;else m_Num = 0;numflag = 1;UpdateData(FALSE);/键入 1void CCalculatorDlg:OnNum1() UpdateData();if(dotflag)quan2 *= 10;m_Num += 1 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 1;else m_Num = 1;numflag = 1;UpdateData(FALSE);/键入 2void CCalculatorDlg:OnNum2() UpdateData();if(dotflag)quan2 *= 10;m_Num += 2 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 2;else m_Num = 2;numflag = 1;UpdateData(FALSE);/键入 3void CCalculatorDlg:OnNum3() UpdateData();if(dotflag)quan2 *= 10;m_Num += 3 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 3;else m_Num = 3;numflag = 1;UpdateData(FALSE);/键入 4void CCalculatorDlg:OnNum4() UpdateData();if(dotflag)quan2 *= 10;m_Num += 4 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 4;else m_Num = 4;numflag = 1;UpdateData(FALSE);/键入 5void CCalculatorDlg:OnNum5() UpdateData();if(dotflag)quan2 *= 10;m_Num += 5 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 5;else m_Num = 5;numflag = 1;UpdateData(FALSE);/键入 6void CCalculatorDlg:OnNum6() UpdateData();if(dotflag)quan2 *= 10;m_Num += 6 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 6;else m_Num = 6;numflag = 1;UpdateData(FALSE);/键入 7void CCalculatorDlg:OnNum7() UpdateData();if(dotflag)quan2 *= 10;m_Num += 7 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 7;else m_Num = 7;numflag = 1;UpdateData(FALSE);/键入 8void CCalculatorDlg:OnNum8() UpdateData();if(dotflag)quan2 *= 10;m_Num += 8 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 8;else m_Num = 8;numflag = 1;UpdateData(FALSE);/键入 9void CCalculatorDlg:OnNum9() UpdateData();if(dotflag)quan2 *= 10;m_Num += 9 / (double)quan2;else if(numflag)m_Num = m_Num * 10 + 9;else m_Num = 9;numflag = 1;UpdateData(FALSE);/键入 +void CCalculatorDlg:OnAdd() UpdateData();num1 = m_Num;cal = +;numflag = 0;dotflag = 0;quan2 = 1;/键入 -void CCalculatorDlg:OnSub() UpdateData();num1 = m_Num;cal = -;numflag = 0;dotflag = 0;quan2 = 1;/键入 *void CCalculatorDlg:OnMul() UpdateData();num1 = m_Num;cal = *;numflag = 0;dotflag = 0;quan2 = 1;/键入 /void CCalculatorDlg:OnDiv() UpdateData();num1 = m_Num;cal = /;numflag = 0;dotflag = 0;quan2 = 1;/键入 %void CCalculatorDlg:OnMod() UpdateData();num1 = m_Num;cal = %;numflag = 0;dotflag = 0;quan2 = 1;/键入 =void CCalculatorDlg:OnEqual() UpdateData();num2 = m_Num;switch(cal)case +: m_Num = num1 + num2; break;case -: m_Num = num1 - num2; break;case *: m_Num = num1 * num2; break;case /: m_Num = num1 / num2; break;case %: m_Num = (int)num1 % (int)num2; break;numflag = 0;dotflag = 0;quan2 = 1;UpdateData(FALSE);/键入 +/-void CCalculatorDlg:OnSign() UpdateData();m_Num = 0 - m_Num;UpdateData(FALSE);/键入 1/xvoid CCalculatorDlg:OnInv() UpdateData();m_Num = 1 / m_Num;numflag = 0;dotflag = 0;quan2 = 1;UpdateData(FALSE);/键入 sqrtvoid CCalculatorD