34dlg.cpp

用Visual C++实现计算器

// 34Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "34.h"
#include "34Dlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMy34Dlg dialog

CMy34Dlg::CMy34Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMy34Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMy34Dlg)
	m_Result_Edit = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMy34Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMy34Dlg)
	DDX_Control(pDX, IDC_ITEM1_EDIT, m_Item1_Edit);
	DDX_Control(pDX, IDC_ITEM2_EDIT, m_Item2_Edit);
	DDX_Text(pDX, IDC_RESULT_EDIT, m_Result_Edit);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMy34Dlg, CDialog)
	//{{AFX_MSG_MAP(CMy34Dlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_ADD_BUTTON, OnAddButton)
	ON_BN_CLICKED(IDC_DIFFERENCE_BUTTON, OnDifferenceButton)
	ON_BN_CLICKED(IDC_MULTIPLY_BUTTON, OnMultiplyButton)
	ON_BN_CLICKED(IDC_DEVIDE_BUTTON, OnDevideButton)
	ON_BN_CLICKED(IDC_EXIT_BUTTON, OnExitButton)
	ON_BN_CLICKED(IDC_CLEAR_BUTTON, OnClearButton)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMy34Dlg message handlers

BOOL CMy34Dlg::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 CMy34Dlg::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 CMy34Dlg::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 CMy34Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMy34Dlg::OnAddButton() 
{//先提取两个操作数，转换成double型，进行加法运算
//然后再把运算结果转换成字符型输出
	// TODO: Add your control notification handler code here
	char cstrItem1[10],cstrItem2[10];//存放两个操作数字符串
	double dfItem1,dfItem2,dfResult;//存放转换成double型的操作数和结果 
	char cBuffer[50];
	m_Item1_Edit.GetWindowText(cstrItem1,10);//获取两个操作数
    m_Item2_Edit.GetWindowText(cstrItem2,10);
	dfItem1=atof((LPCTSTR)cstrItem1);//转换操作数的类型
	dfItem2=atof((LPCTSTR)cstrItem2);
	dfResult=dfItem1+dfItem2;
	//_gcvt(double型的数据，需要保存得长度，保存转换后的字符串)
	_gcvt(dfResult,10,cBuffer);//Converts a floating-point value to a string, which it stores in a buffer.
	m_Result_Edit=(LPCTSTR)cBuffer;
	UpdateData(FALSE);
}

void CMy34Dlg::OnDifferenceButton() //思想同加法
{
	// TODO: Add your control notification handler code here
	char cstrItem1[10],cstrItem2[10];
	double dfItem1,dfItem2,dfResult;
	char cBuffer[50];
	m_Item1_Edit.GetWindowText(cstrItem1,10);
    m_Item2_Edit.GetWindowText(cstrItem2,10);
	dfItem1=atof((LPCTSTR)cstrItem1);
	dfItem2=atof((LPCTSTR)cstrItem2);
	dfResult=dfItem1-dfItem2;
	_gcvt(dfResult,10,cBuffer);
	m_Result_Edit=(LPCTSTR)cBuffer;
	UpdateData(FALSE);
	
}

void CMy34Dlg::OnMultiplyButton() //思想同上
{
	// TODO: Add your control notification handler code here
	char cstrItem1[10],cstrItem2[10];
	double dfItem1,dfItem2,dfResult;
	char cBuffer[50];
	m_Item1_Edit.GetWindowText(cstrItem1,10);
    m_Item2_Edit.GetWindowText(cstrItem2,10);
	dfItem1=atof((LPCTSTR)cstrItem1);
	dfItem2=atof((LPCTSTR)cstrItem2);
	dfResult=dfItem1*dfItem2;
	_gcvt(dfResult,10,cBuffer);
	m_Result_Edit=(LPCTSTR)cBuffer;
	UpdateData(FALSE);
	
}

void CMy34Dlg::OnDevideButton() 
{
	// TODO: Add your control notification handler code here
	char cstrItem1[10],cstrItem2[10];
	double dfItem1,dfItem2,dfResult;
	char cBuffer[50];
	m_Item1_Edit.GetWindowText(cstrItem1,10);
    m_Item2_Edit.GetWindowText(cstrItem2,10);
	dfItem1=atof((LPCTSTR)cstrItem1);
	dfItem2=atof((LPCTSTR)cstrItem2);
	dfResult=dfItem1/dfItem2;
	_gcvt(dfResult,10,cBuffer);
	m_Result_Edit=(LPCTSTR)cBuffer;
	UpdateData(FALSE);
	
}

void CMy34Dlg::OnClearButton() 
{
	// TODO: Add your control notification handler code here
	m_Item1_Edit.SetSel(0,-1);
	m_Item1_Edit.ReplaceSel("");
	m_Item2_Edit.SetSel(0,-1);
	m_Item2_Edit.ReplaceSel("");
	m_Result_Edit="";
	UpdateData(FALSE);
}

void CMy34Dlg::OnExitButton() 
{
	// TODO: Add your control notification handler code here
	OnOK();
}