listtestdlg.cpp

链表基本操作:链表的初始化

// ListTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ListTest.h"
#include "ListTestDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CListTestDlg dialog

CListTestDlg::CListTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CListTestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CListTestDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32


	pListHead = NULL ;

	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CListTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CListTestDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CListTestDlg, CDialog)
	//{{AFX_MSG_MAP(CListTestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
	ON_BN_CLICKED(IDC_BUTTON4, OnButton4)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CListTestDlg message handlers

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

//链表元素初始化
void CListTestDlg::OnButton1() 
{
	ListStructData	*pnew;
	pnew = new ListStructData;

	Initialize(pnew);//链表元素初始化	
}

void CListTestDlg::Initialize(ListStructData *ptemp)
{
	ptemp->data1 = 0 ;
	ptemp->data2 = 0 ;
	ptemp->data3.Empty() ;

	ptemp->next = NULL ;
}

//插入指定元素至链表头
void CListTestDlg::OnButton2() 
{
	ListStructData	*pnew;
	pnew = new ListStructData;

	Initialize(pnew);//链表元素初始化

	int diaoyong;

	diaoyong =rand();//取随机数

	diaoyong %= 20;

	pnew->data1 = diaoyong;
	pnew->data2 = 22;
	pnew->data3 = _T("test");

	Insert(pnew);
}

void CListTestDlg::Insert(ListStructData *ptemp)
{
	if (ptemp==NULL)
		return;
	ptemp->next = pListHead;
	pListHead = ptemp;

}

//从链表中删除指定元素
void CListTestDlg::OnButton3() 
{
	ListStructData	*ptemp,*ptempold;
	
	ptemp = pListHead;
	ptempold = ptemp;

	while ( ptemp != NULL )
	{
		if (ptemp->data1 == 1)//满足删除条件
		{
			if (ptemp == pListHead)//链表头
			{
				pListHead = ptemp->next;
				delete ptemp;
				ptemp = pListHead;
			}
			else//其余节点元素
			{
				ptempold->next = ptemp->next;
				delete ptemp;
				ptemp = ptempold->next;
			}
		}
		else
		{
			ptempold = ptemp;
			ptemp = ptemp->next;
		}
	}
}

//清空链表
void CListTestDlg::OnButton4() 
{
	Clear();	
}

void CListTestDlg::Clear()
{
	ListStructData *ptemp_cur;

	while(pListHead != NULL)
	{
		ptemp_cur = pListHead->next;
		delete pListHead;
		pListHead = ptemp_cur;
	}
}