convnumsdlg.cpp

C语言程序设计中的进制转换,比较好,非常适合初学者使用学习

// ConvNumsDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ConvNums.h"
#include "ConvNumsDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CConvNumsDlg dialog

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

void CConvNumsDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CConvNumsDlg)
	DDX_Text(pDX, IDC_DECIMAL, m_strDecimal);
	DDX_Text(pDX, IDC_BINARY, m_strBinary);
	DDX_Text(pDX, IDC_HEX, m_strHex);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CConvNumsDlg, CDialog)
	//{{AFX_MSG_MAP(CConvNumsDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_DECIMAL_CONV, OnDecimalConv)
	ON_BN_CLICKED(IDC_BINARY_CONV, OnBinaryConv)
	ON_BN_CLICKED(IDC_HEX_CONV, OnHexConv)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CConvNumsDlg message handlers

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

//将16进制的一个字符转换为十进制的数
unsigned char CConvNumsDlg::BtoH(char ch)
{
	//0-9
	if (ch >= '0' && ch <= '9') 
		return (ch - '0');         

	//9-15
	if (ch >= 'A' && ch <= 'F') 
		return (ch - 'A' + 0xA);   

	//9-15
	if (ch >= 'a' && ch <= 'f')
		return (ch - 'a' + 0xA);  
	return(255); 
}

//转换十进制数
void CConvNumsDlg::OnDecimalConv() 
{
	UpdateData(TRUE);
	//先转换为二进制
	m_strBinary = DecimalToBinary(m_strDecimal);

	//再转换为十六进制
	m_strHex = BinaryToHex(m_strBinary);
	UpdateData(FALSE);
}

//转换二进制数
void CConvNumsDlg::OnBinaryConv() 
{
	UpdateData(TRUE);
	//转换为十进制
	m_strDecimal = BinaryToDecimal(m_strBinary);

	//转换为十六进制
	m_strHex = BinaryToHex(m_strBinary);
	UpdateData(FALSE);
}

//转换十六进制数
void CConvNumsDlg::OnHexConv() 
{
	UpdateData(TRUE);
	//先转换为二进制
	m_strBinary = HexToBinary(m_strHex);

	//再转换为十进制
	m_strDecimal = BinaryToDecimal(m_strBinary);
	UpdateData(FALSE);
}

//转换十六进制为二进制
CString CConvNumsDlg::HexToBinary(CString strHex)
{
	int nLenth = strHex.GetLength();
	char* Hex = new char[nLenth];
	Hex = strHex.GetBuffer(0);
	CString strBinary = "";
	for(int i=0;i<nLenth;i++)
	{
		//转换一位十六进制数为十进制
		char h = Hex[nLenth-1-i];
		int j = BtoH(h);
		CString str;
		str.Format("%d",j);

		//转换十进制为4为二进制
		str = DecimalToBinary(str);
		strBinary += str;
	}
	return strBinary;
}

//转换二进制为十六进制
CString CConvNumsDlg::BinaryToHex(CString strBinary)
{
	int nLength = strBinary.GetLength();
	CString str = strBinary;
	//位数不是四的倍数时补齐
	switch(nLength%4)
	{
	case 0:
		break;
	case 1:
		strBinary.Format("%d%d%d%s",0,0,0,str);
		break;
	case 2:
		strBinary.Format("%d%d%s",0,0,str);
		break;
	case 3:
		strBinary.Format("%d%s",0,str);
		break;
	default:
		return "";
		break;
	}

	CString strHex,str1;
	str1 = "";
	nLength = strBinary.GetLength();
	for(int i=1;i<=(nLength/4);i++)
	{
		//每四位二进制数转换为一十六进制数
		str = strBinary.Left(4);
		CString strDecimal = BinaryToDecimal(str);
		int nDecimal = atoi(strDecimal.GetBuffer(0));
		if(nDecimal<10)
			str1.Format("%d",nDecimal);
		else
		{
			char c = 'A' + (nDecimal-10);
			str1.Format("%c",c);
		}
		strHex += str1;
		strBinary = strBinary.Right(strBinary.GetLength()-str.GetLength());
	}
	return strHex;
}

//转换十进制为二进制
CString CConvNumsDlg::DecimalToBinary(CString strDecimal)
{
	int nDecimal = atoi(strDecimal.GetBuffer(0));

	int nYushu;	//余数
	int nShang;	//商
	CString strBinary = "";
	char buff[2];
	CString str = "";
	BOOL bContinue = TRUE;
	while(bContinue)
	{
		nYushu = nDecimal%2;
		nShang = nDecimal/2;
		sprintf(buff,"%d",nYushu);
		str = strBinary;
		strBinary.Format("%s%s",buff,str);
		nDecimal = nShang;
		if(nShang==0)
			bContinue = FALSE;
	}
	return strBinary;
}

//转换二进制为十进制
CString CConvNumsDlg::BinaryToDecimal(CString strBinary)
{
	int nLenth = strBinary.GetLength();
	char* Binary = new char[nLenth];
	Binary = strBinary.GetBuffer(0);
	int nDecimal = 0;
	for(int i=0;i<nLenth;i++)
	{
		char h = Binary[nLenth-1-i];
		char str[1];
		str[0] = h;
		int j = atoi(str);
		for(int k=0;k<i;k++)
		{
			j=j*2;
		}
		nDecimal += j;
	}
	CString strDecimal;

	strDecimal.Format("%d",nDecimal);
	return strDecimal;
}