河北工业大学离散数学综合实验一

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1、实验一 计算器设计与实现一、实验目的与要求实验目的：锻炼可视化编程能力实验要求：1、熟悉VC+编程环境。2、运用C+程序设计知识对实验题目进行分析和设计。3、进行程序编写和调试工作。二、实验内容 使用MFC框架在Visual Studio 6.0环境下编写一个简易的计算器，能实现简单的加、减、乘、除四则运算，并加入特定的一些效果，如使计算器的颜色在红色，绿色和蓝色之间轮流变换等。完成诸如计算器对话框的创建、控件编辑、界面设计、关键功能的实现等工作。三、实现方法1、设计界面。创建一个对话框，在对话框中添加文本框用来显示计算结果，按钮：0-9、小数点、+、-、*、/、=等。2、实现各个按钮的功能。

2、3、实现简单的语法分析，保证正确的计算结果。4、实现颜色的变换。四、程序源代码/ caaDlg.cpp : implementation file/#include stdafx.h#include caa.h#include caaDlg.h#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endif/ CAboutDlg dialog used for App Aboutint m=0,n=255,k=0; /定义全局变量改变窗体颜色class CAboutDlg : publ

3、ic 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(CAboutDl

4、g)/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 mess

5、age handlers/AFX_MSG_MAPEND_MESSAGE_MAP()/ CCaaDlg dialogCCaaDlg:CCaaDlg(CWnd* pParent /*=NULL*/): CDialog(CCaaDlg:IDD, pParent)/AFX_DATA_INIT(CCaaDlg)m_result = _T();/AFX_DATA_INIT/ Note that LoadIcon does not require a subsequent DestroyIcon in Win32m_hIcon = AfxGetApp()-LoadIcon(IDR_MAINFRAME); /

6、*/m_coff=0.1f; /为变量进行初始m_bCoff=0; /为变量进行初始m_errorState = ErrNone; /为变量进行初始m_bOperandAvail=FALSE; /为变量进行初始m_operator=OpNone; m_accum=0; /*/void CCaaDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CCaaDlg)DDX_Text(pDX, IDC_EDIT, m_result);/AFX_DATA_MAPBEGIN_MESSAGE_MAP(

7、CCaaDlg, CDialog)/AFX_MSG_MAP(CCaaDlg)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_WM_CTLCOLOR()ON_BN_CLICKED(IDC_BUTTON1, On7)ON_BN_CLICKED(IDC_BUTTON2, On8)ON_BN_CLICKED(IDC_BUTTON3, On9)ON_BN_CLICKED(IDC_BUTTON6, On4)ON_BN_CLICKED(IDC_BUTTON7, On5)ON_BN_CLICKED(IDC_BUTTON8, On6)ON_BN_CL

8、ICKED(IDC_BUTTON11, On1)ON_BN_CLICKED(IDC_BUTTON12, On2)ON_BN_CLICKED(IDC_BUTTON14, On3)ON_BN_CLICKED(IDC_BUTTON17, On0)ON_BN_CLICKED(IDC_BUTTON18, Ondian)ON_BN_CLICKED(IDC_BUTTON19, Onclear)ON_BN_CLICKED(IDC_BUTTON22, Ondengyu)ON_BN_CLICKED(IDC_BUTTON4, Onjia)ON_BN_CLICKED(IDC_BUTTON5, Onjian)ON_BN

9、_CLICKED(IDC_BUTTON9, Oncheng)ON_BN_CLICKED(IDC_BUTTON10, Onchu)ON_BN_CLICKED(IDC_BUTTON13, Onhongse)ON_BN_CLICKED(IDC_BUTTON20, Onlanse)ON_BN_CLICKED(IDC_BUTTON21, Onlvse)ON_BN_CLICKED(IDC_BUTTON24, Onhuangse)ON_BN_CLICKED(IDC_BUTTON15, OnCANCEL)/AFX_MSG_MAPEND_MESSAGE_MAP()/ CCaaDlg message handle

10、rsBOOL CCaaDlg: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

11、 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 herem_brush.CreateSolidBrush(RGB(m, n, k);return TRUE; / return TRUE unless you

12、 set the focus to a controlvoid CCaaDlg: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 application

13、s using the document/view model,/ this is automatically done for you by the framework.void CCaaDlg:OnPaint() if (IsIconic()CPaintDC dc(this); / device context for paintingSendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);/ Center icon in client rectangleint cxIcon = GetSystemMetrics(SM_CXI

14、CON);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/

15、 the minimized window.HCURSOR CCaaDlg:OnQueryDragIcon()return (HCURSOR) m_hIcon;HBRUSH CCaaDlg:OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) /HBRUSH hbr = CDialog:OnCtlColor(pDC, pWnd, nCtlColor);/ TODO: Change any attributes of the DC here/ TODO: Return a different brush if the default is not de

16、siredreturn m_brush;/*/*输入模块*/void CCaaDlg:OnOperandInput(int a) /处理0-9 数字的输入函数 if (m_errorState != ErrNone) /判断当前运算是否有误，若有则返回return; if (!m_bOperandAvail) /判断是否输入新的数字，1-是0-否m_operand = 0; if(!m_bCoff) /判断是否是小数输入，1-是0-否m_operand=m_operand*10+(a); else m_operand=m_operand+(a)*m_coff; m_coff*=0.1f; m_

17、bOperandAvail=TRUE; UpdateDisplay(); /更新显示 /*计算处理模块*/void CCaaDlg:Calculate() /处理计算函数 if (m_errorState != ErrNone) return; if (m_bOperandAvail) /如果没有计算符就将m_operand值赋予m_accum if (m_operator = OpNone) m_accum = m_operand; else if (m_operator = OpMultiply) /否则按计算符进行计算m_accum *= m_operand; else if (m_op

18、erator = OpDivide) if (m_operand = 0) m_errorState = ErrDivideByZero; else m_accum /= m_operand; else if (m_operator = OpAdd) m_accum += m_operand; else if (m_operator = OpSubtract) m_accum -= m_operand; m_bOperandAvail = FALSE; m_bCoff=0; m_coff=0.1f; UpdateDisplay(); /*显示模块*/void CCaaDlg:UpdateDis

19、play() /处理显示函数 if (GetSafeHwnd() = NULL) return; if (m_errorState != ErrNone) m_result=除数不能为零; else /如果当前计算无错误那么进行显示 /如果是输入计算数，那么显示输入情况，如果按下计算符，则显示结果float lVal = (m_bOperandAvail) ? m_operand : m_accum; m_result.Format(_T(%f), lVal); /将float型转化为CString型int i=m_result.GetLength();while(m_result.GetAt

20、(i-1)=0) m_result.Delete(i-1,1);i-=1; /用编辑控件变量m_result改变编辑控件的值，更新显示UpdateData(FALSE); /*/ The system calls this to obtain the cursor to display while the user drags/ the minimized window.void CCaaDlg:Ondengyu() / TODO: Add your control notification handler code hereCalculate(); m_operator = OpNone;v

21、oid CCaaDlg:On0() / TODO: Add your control notification handler code hereOnOperandInput(0); void CCaaDlg:On1() / TODO: Add your control notification handler code hereOnOperandInput(1); void CCaaDlg:On2() / TODO: Add your control notification handler code hereOnOperandInput(2);void CCaaDlg:On3() / TO

22、DO: Add your control notification handler code hereOnOperandInput(3);void CCaaDlg:On4() / TODO: Add your control notification handler code hereOnOperandInput(4);void CCaaDlg:On5() / TODO: Add your control notification handler code hereOnOperandInput(5);void CCaaDlg:On6() / TODO: Add your control not

23、ification handler code hereOnOperandInput(6);void CCaaDlg:On7() / TODO: Add your control notification handler code hereOnOperandInput(7);void CCaaDlg:On8() / TODO: Add your control notification handler code hereOnOperandInput(8);void CCaaDlg:On9() / TODO: Add your control notification handler code h

24、ereOnOperandInput(9);void CCaaDlg:Oncheng() / TODO: Add your control notification handler code hereCalculate(); m_operator = OpMultiply;void CCaaDlg:Onchu() / TODO: Add your control notification handler code herCalculate();m_operator = OpDivide;void CCaaDlg:Onjia() / TODO: Add your control notificat

25、ion handler code hereCalculate(); m_operator = OpAdd;void CCaaDlg:Onjian() / TODO: Add your control notification handler code hereCalculate(); m_operator = OpSubtract; void CCaaDlg:Ondian() / TODO: Add your control notification handler code herem_bCoff=1;UpdateDisplay(); void CCaaDlg:Onclear() / TOD

26、O: Add your control notification handler code here m_coff=0.1f; /为变量进行还原m_bCoff=0; /为变量进行还原m_errorState = ErrNone; /为变量进行还原m_bOperandAvail=FALSE; /为变量进行还原m_operator=OpNone; m_accum=0;m_operand=0;Calculate(); m_operator = OpNone;UpdateData(FALSE);void CCaaDlg:Onhongse() / TODO: Add your control notif

27、ication handler code here m_brush.DeleteObject();Invalidate();m = 220;n = 20;k = 60;m_brush.CreateSolidBrush(RGB(m, n, k);UpdateWindow();void CCaaDlg:Onlanse() / TODO: Add your control notification handler code herem_brush.DeleteObject();Invalidate();m = 0;n = 0;k = 255;m_brush.CreateSolidBrush(RGB(

28、m, n, k);UpdateWindow();void CCaaDlg:Onlvse() / TODO: Add your control notification handler code herem_brush.DeleteObject();Invalidate();m = 0;n = 255;k = 127;m_brush.CreateSolidBrush(RGB(m, n, k);UpdateWindow();void CCaaDlg:Onhuangse() / TODO: Add your control notification handler code herem_brush.

29、DeleteObject();Invalidate();m = 255;n = 255;k = 0;m_brush.CreateSolidBrush(RGB(m, n, k);UpdateWindow();void CCaaDlg:OnCANCEL() / TODO: Add your control notification handler code hereCCaaDlg:OnCANCEL();六、程序截图 七、实验总结 通过对MFC课程的学习我掌握了MFC开发控件的基础能力，利用基本的菜单和窗体工具可以创建一些自己想要的窗体和控件，并按照自己的意愿设置属性。为以后的更高级的语言学习做准备。