ddlg.cpp

将16进制字符串转10进制的程序,有主要函数讲解.

// dDlg.cpp : implementation file
//

#include "stdafx.h"
#include "d.h"
#include "dDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CDDlg dialog

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

void CDDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDDlg)
	DDX_Control(pDX, IDC_EDIT1, m_edit);
	DDX_Text(pDX, IDC_EDIT1, m_str);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDDlg, CDialog)
//{{AFX_MSG_MAP(CDDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_CONVERT, OnConvert)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDDlg message handlers



void CDDlg::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 CDDlg::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 CDDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}


#include <math.h>

int strHexToInt(char* strSource)
{	
	int nTemp=0;

	CString strTemp;
	strTemp=strSource;
	for(char cc='G',dd='g';   cc<='Z',dd<='z';  cc++,dd++)    //判断输入的字符串是否合法
	{
		if(strTemp.Find(cc,0) !=-1  ||  strTemp.Find(dd,0) !=-1)
		{
			::MessageBox(NULL,"请输入正确的16进制字符串!","输入错误",MB_ICONEXCLAMATION);
			return -1;
		}
	}


	for(int i = 0;  i<(int)::strlen(strSource);  i++)
	{
		int nDecNum;
		switch(strSource[i])
		{
			case 'a':
			case 'A':	nDecNum = 10;	break;
			case 'b':
			case 'B':	nDecNum = 11;	break;
			case 'c':
			case 'C':   nDecNum = 12;   break;
			case 'd':
			case 'D':   nDecNum = 13;   break;
			case 'e':
			case 'E':   nDecNum = 14;   break;
			case 'f':
			case 'F':   nDecNum = 15;   break;
			case '0':
			case '1':
			case '2':
			case '3':
			case '4':
			case '5':
			case '6':
			case '7':
			case '8':
			case '9':    nDecNum = strSource[i] - '0';     break;
			default:     return 0;			
        }
	    nTemp += nDecNum * (int)::pow(16,::strlen(strSource)-i -1);
	}
	return nTemp;
}


void CDDlg::OnConvert() 
{
	UpdateData();

	if(strHexToInt((LPSTR)(LPCTSTR)m_str) !=-1)
	{
		CString str;
		str.Format("%d",strHexToInt((LPSTR)(LPCTSTR)m_str));
		SetDlgItemText(IDC_STATE,str);
	}
	m_edit.SetWindowText("");
	m_edit.SetFocus();
}

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

	m_font.CreateFont(48, 0,0,0,FW_BOLD, 0,0,0,
		DEFAULT_CHARSET, OUT_CHARACTER_PRECIS, CLIP_CHARACTER_PRECIS,
		DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, "times new roman");

	GetDlgItem(IDC_STATE)->SetFont(&m_font);

	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}