MFC計算器項目——單位換算模塊

計算器單位換算模塊（運行效果圖參見計算器項目綜述）

對於單位換算這一模塊，僅實現了兩個部分，一個是攝氏度與華氏度之間的轉換，另外一個是焦耳與熱卡路里之間的進制轉換。

下面是該模塊開發文檔截圖：

下面是核心代碼：

// MyDlg_3.cpp : implementation file
//

#include "stdafx.h"
#include "簡化調試.h"
#include "簡化調試Dlg.h"
#include "MyDlg_1.h"
#include "MyDlg_2.h"
#include "MyDlg_3.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMyDlg_3 dialog


CMyDlg_3::CMyDlg_3(CWnd* pParent /*=NULL*/)
	: CDialog(CMyDlg_3::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMyDlg_3)
	m_cdegree = 0.0f;
	m_fdegree = 0.0f;
	m_je = 0.0f;
	m_cal = 0.0f;
	//}}AFX_DATA_INIT
}


void CMyDlg_3::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMyDlg_3)
	DDX_Text(pDX, IDC_EDIT1, m_cdegree);
	DDX_Text(pDX, IDC_EDIT2, m_fdegree);
	DDX_Text(pDX, IDC_EDIT3, m_je);
	DDX_Text(pDX, IDC_EDIT4, m_cal);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CMyDlg_3, CDialog)
	//{{AFX_MSG_MAP(CMyDlg_3)
	ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
	ON_EN_CHANGE(IDC_EDIT2, OnChangeEdit2)
	ON_EN_CHANGE(IDC_EDIT3, OnChangeEdit3)
	ON_EN_CHANGE(IDC_EDIT4, OnChangeEdit4)
	ON_COMMAND(ID_MENUITEM3, OnMenuitem3)
	ON_COMMAND(ID_MENUITEM0, OnMenuitem0)
	ON_COMMAND(ID_MENUITEM1, OnMenuitem1)
	ON_COMMAND(ID_MENUITEM2, OnMenuitem2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg_3 message handlers

void CMyDlg_3::OnChangeEdit1() 
{
	// 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
	UpdateData();
	m_fdegree = 32 + m_cdegree * 1.8;
	UpdateData(FALSE);
}

void CMyDlg_3::OnChangeEdit2() 
{
	// 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
	UpdateData();
	m_cdegree = (m_fdegree - 32) / 1.8;
	UpdateData(FALSE);
}

void CMyDlg_3::OnChangeEdit3() 
{
	// 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
	UpdateData();
	m_cal = m_je / 4.184;
	UpdateData(FALSE);
}

void CMyDlg_3::OnChangeEdit4() 
{
	// 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
	UpdateData();
	m_je = m_cal * 4.184;
	UpdateData(FALSE);
}

void CMyDlg_3::OnMenuitem3() 
{
	// TODO: Add your command handler code here
	MessageBox("您已處於單位換算模式！");
}

void CMyDlg_3::OnMenuitem0() 
{
	// TODO: Add your command handler code here
	CMyDlg_3::OnCancel();
	CMyDlg dlg;
	dlg.DoModal();
}

void CMyDlg_3::OnMenuitem1() 
{
	// TODO: Add your command handler code here
	CMyDlg_3::OnCancel();
	CMyDlg_1 dlg;
	dlg.DoModal();
}

void CMyDlg_3::OnMenuitem2() 
{
	// TODO: Add your command handler code here
	CMyDlg_3::OnCancel();
	CMyDlg_2 dlg;
	dlg.DoModal();
}