celeritydlg.cpp

快速排序是选一个中间值

// CelerityDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Celerity.h"
#include "CelerityDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CCelerityDlg dialog

CCelerityDlg::CCelerityDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCelerityDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCelerityDlg)
	m_Num = 0;
	m_Edit = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCelerityDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCelerityDlg)
	DDX_Text(pDX, IDC_EDIT1, m_Num);
	DDX_Text(pDX, IDC_EDIT2, m_Edit);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCelerityDlg, CDialog)
	//{{AFX_MSG_MAP(CCelerityDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCelerityDlg message handlers

BOOL CCelerityDlg::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
	n = 1;
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CCelerityDlg::OnButton1() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	num[n-1] = m_Num;
	n++;
	if(n == 31)
	{
		GetDlgItem(IDC_EDIT1)->EnableWindow(FALSE);
		GetDlgItem(IDC_BUTTON1)->EnableWindow(FALSE);
		return;
	}
	CString str;
	str.Format("第%d个",n);
	m_Num = 0;
	GetDlgItem(IDC_BUTTON1)->SetWindowText(str);
	GetDlgItem(IDC_EDIT1)->SetFocus();
	UpdateData(FALSE);
}

void CCelerityDlg::OnButton2() 
{
	// TODO: Add your control notification handler code here
	CelerityRun(0,n-2);
	for(int i=0;i<n-1;i++)
	{
		CString str;
		str.Format("%d	",num[i]);
		m_Edit += str;
		if(i%5 == 4)
		{
			m_Edit += "\r\n";
		}
	}
	UpdateData(FALSE);
}

void CCelerityDlg::CelerityRun(int left, int right)
{
	int i,j; 
	int middle,iTemp; 
	i = left; 
	j = right; 
	middle = num[(left+right)/2]; //求中间值 
	do
	{ 
		while((num[i]<middle) && (i<right))//从左找小于中值的数 
			i++;      
		while((num[j]>middle) && (j>left))//从右找大于中值的数 
			j--; 
		if(i<=j)//找到了一对值 
		{ 
			iTemp = num[i]; 
			num[i] = num[j]; 
			num[j] = iTemp; 
			i++; 
			j--; 
		} 
	}while(i<=j);//如果两边的下标交错，就停止（完成一次） 

	//递归左半边 
	if(left<j) 
		CelerityRun(left,j); 
	//递归右半边 
	if(right>i) 
		CelerityRun(i,right); 
}