计算器dlg.cpp

用C++做的计算器

// 计算器Dlg.cpp : 实现文件
//

#include "stdafx.h"
#include "计算器.h"
#include "计算器Dlg.h"
#include"math.h"
#include ".\计算器dlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// 对话框数据
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持

// 实现
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CMyDlg 对话框



CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMyDlg::IDD, pParent)
	, m_number(0)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_NumberState=1;
	flag=false;
	flag2=false;
}

void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Text(pDX, IDC_EDIT_PUTOUT, m_number);
}

BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_COMMAND_RANGE(IDC_NUMBER1,IDC_NUMBER0,OnNumberKey)
	ON_COMMAND_RANGE(IDC_MINUS,IDC_RESULT,OnOperationKey)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


// CMyDlg 消息处理程序

BOOL CMyDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 将\“关于...\”菜单项添加到系统菜单中。

	// IDM_ABOUTBOX 必须在系统命令范围内。
	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);
		}
	}

	// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
	//  执行此操作
	SetIcon(m_hIcon, TRUE);			// 设置大图标
	SetIcon(m_hIcon, FALSE);		// 设置小图标

	// TODO: 在此添加额外的初始化代码
	
	return TRUE;  // 除非设置了控件的焦点，否则返回 TRUE
}

void CMyDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CMyDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // 用于绘制的设备上下文

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// 使图标在工作矩形中居中
		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;

		// 绘制图标
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

//当用户拖动最小化窗口时系统调用此函数取得光标显示。
HCURSOR CMyDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}
void CMyDlg::OnNumberKey(UINT nID)
{
	if(flag==true)
	{
		m_number=0;
		flag=false;
	}
	int n=0;
	switch(nID)
	{
	case IDC_NUMBER1:
		n=1;break;
	case IDC_NUMBER2:
		n=2;break;
	case IDC_NUMBER3:
		n=3;break;
	case IDC_NUMBER4:
		n=4;break;
	case IDC_NUMBER5:
		n=5;break;
	case IDC_NUMBER6:
		n=6;break;
	case IDC_NUMBER7:
		n=7;break;
	case IDC_NUMBER8:
		n=8;break;
	case IDC_NUMBER9:
		n=9;break;
	case IDC_NUMBER0:
		n=0;break;
	}
	if(m_NumberState==1)
	{
		m_number=m_number*10+n;
		m_number2=m_number1=m_number;
		UpdateData(false);
	}
	else
	{
		m_number=m_number*10+n;
		m_number2=m_number;
		UpdateData(false);
	}
}
void CMyDlg::OnOperationKey(UINT nID)
{
	flag=true;
	switch(nID)
	{
	case IDC_MINUS:
		if(m_NumberState==1)
			m_number=m_number1=-m_number1;
		else
			m_number=m_number2=-m_number2;
		UpdateData(false);
		break;
	case IDC_BACK:
		if(m_NumberState==1)
			m_number=m_number1=(int)m_number1/10;
		else
			m_number=m_number2=(int)m_number2/10;
		UpdateData(false);
		m_number=0;
		break;
	case IDC_DIVIDE:
		m_OperationState=1;
		m_number=m_number1;
		UpdateData(false);
		m_NumberState=2;
		break;
	case IDC_MULTIPLY:
		m_OperationState=2;
		m_number=m_number1;
		UpdateData(false);
		m_NumberState=2;
		break;
	case IDC_ADD:
		m_OperationState=3;
		m_number=m_number1;
		UpdateData(false);
		m_NumberState=2;
		break;
	case IDC_SUBTRACT:
		m_OperationState=4;
		m_number=m_number1;
		UpdateData(false);
		m_NumberState=2;
		break;
	case IDC_CLEAR:
		m_number1=m_number2=m_number=0;
		flag=false;
		UpdateData(false);
		m_NumberState=1;
		break;
	case IDC_SQRT:
		m_number1=m_number=sqrt(m_number1);
		UpdateData(false);
		break;
	case IDC_RECIPROCAL:
		m_number1=m_number=(double)1/m_number1;
		UpdateData(false);
		break;
	case IDC_RESULT:
		cal();
		break;
	}
}
void CMyDlg::cal()
{
	flag=true;
	switch(m_OperationState)
	{
	case 1:
		m_number=(double)m_number1/m_number2;
		m_NumberState=1;
		UpdateData(false);
		break;
	case 2:
		m_number=m_number1*m_number2;
		m_NumberState=1;
		UpdateData(false);
		break;
	case 3:
		m_number=m_number1+m_number2;
		m_NumberState=1;
		UpdateData(false);
		break;
	case 4:
		m_number=m_number1-m_number2;
		m_NumberState=1;
		UpdateData(false);
		break;
	}
	m_number1=m_number;
	m_number=0;
}