bitreedlg.cpp

实现各种二叉树的遍历。包括先序遍历、中序遍历、后序遍历的递归或递 归算法。

// BiTreeDlg.cpp : implementation file
//

#include "stdafx.h"
#include "BiTree.h"
#include "BiTreeDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
////////////////////////////////////////
template<class T>
void  Stack<T>::Init_SeqStack(){
	top =-1;
}

template<class T>
int Stack<T>::Empty_SeqStack(){
 if(top ==-1)
  return 1;
 else 
  return 0;
}

template<class T>
int Stack<T>::Push_SeqStack(T x){
 if(top==MAX)
  return 0;
 else
 {
  top++;
  data [top]=x;
  return 1;
 }
}

template<class T>
int Stack<T>::Pop_SeqStack(T *x){
 if(Empty_SeqStack())
  return 0;
 else
 {
  *x=data [top];
  top --;
  return 1;
 }
}
///***********************************************************************
//按先序次序输入，构造二叉链表表示的二叉树T，# 表示空树

void CBiTreeDlg::CreateBiTree(BiTree &bt,CString &code)
{	
	char ch;
	if(code.GetLength()==0)
	{
		bt=NULL;
		return ;
	}

	ch=code[0];

	if(ch=='#')
	{
		bt=NULL;
		code=code.Right(code.GetLength()-1);
	}
	else
	{
		bt=(BiTree)malloc(sizeof(Bnode));
		bt->data=ch;
		code=code.Right(code.GetLength()-1);
		CreateBiTree(bt->lchild,code);
		CreateBiTree(bt->rchild,code);
	}
}
//**************************************************************************
// 先序遍历
void CBiTreeDlg::PreOrderTraverse(BiTree bt){
 if(bt){
  
  m_b+=bt->data;
  PreOrderTraverse(bt->lchild);
  PreOrderTraverse(bt->rchild);
 }
}

void CBiTreeDlg::CPreOrderTraverse(BiTree t){
 Stack<BiTree> S;
 Bnode *p=t;
 S.Init_SeqStack();
 while(p||!S.Empty_SeqStack())
 {
  if(p)
  {
  m_b+=p->data ;
   S.Push_SeqStack(p);
   p=p->lchild ;
  }
  else
  {
   S.Pop_SeqStack(&p);
   
   p=p->rchild ;
  }
 }
}


//******************************************************************
//中序遍历
void CBiTreeDlg::InOrderTraverse(BiTree bt){
 if(bt){
  InOrderTraverse(bt->lchild);
  m_c+=bt->data;
  InOrderTraverse(bt->rchild);
 }
}

void CBiTreeDlg::CInOrderTraverse(BiTree t){
 Stack<BiTree> S;
 Bnode *p=t;
 S.Init_SeqStack();
 while(p||!S.Empty_SeqStack())
 {
  if(p)
  {
   S.Push_SeqStack(p);
   p=p->lchild ;
  }
  else
  {
   S.Pop_SeqStack(&p);
   m_c+=p->data ;
   p=p->rchild ;
  }
 }
}

//**************************************************************************
//后序遍历
void CBiTreeDlg::PostOrderTraverse(BiTree t){
 if(t){
  PostOrderTraverse(t->lchild );
  PostOrderTraverse(t->rchild );
  m_d+=t->data;
 }
}

void CBiTreeDlg::CPostOrderTraverse(BiTree t){
 Stack<DataType> S;
 DataType Sq;
 Bnode *p=t;
 S.Init_SeqStack();
 while(p||!S.Empty_SeqStack())
 {
  if(p)
  {
   Sq.flag=0;
   Sq.node=p;
   S.Push_SeqStack(Sq);
   p=p->lchild ;
  }
  else
  {
   S.Pop_SeqStack(&Sq);
   p=Sq.node;
   if(Sq.flag==0)
   {
    Sq.flag=1;
    S.Push_SeqStack(Sq);
    p=p->rchild ;
   }
   else
   {
    m_d+=p->data ;
    p=NULL;
   }
  }
 }
}

//**************************************************************************
//层序遍历
void CBiTreeDlg::LevelOrderTraverse(BiTree t){
 const int MaxLength=1024;
 BiTree Q[MaxLength];
 int front=0,rear=0;
 BiTree p;
 if(t){ //根结点入队
  Q[rear]=t;
  rear=(rear+1)%MaxLength;
 } 
 while(front!=rear){
  p=Q[front];   //队头元素出队
  front=(front+1)%MaxLength; 
  m_e+=p->data;
  if(p->lchild){  //左孩子不为空，入队
   Q[rear]=p->lchild;
   rear=(rear+1)%MaxLength;
  }
  if(p->rchild){ //右孩子不为空，入队
   Q[rear]=p->rchild;
   rear=(rear+1)%MaxLength;
  }
 }
}


//**************************************************************************


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()

/////////////////////////////////////////////////////////////////////////////
// CBiTreeDlg dialog

CBiTreeDlg::CBiTreeDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CBiTreeDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CBiTreeDlg)
	m_a = _T("ab##c##");
	m_b = _T("");
	m_c = _T("");
	m_d = _T("");
	m_e = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	root=NULL;
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CBiTreeDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBiTreeDlg)
	DDX_Text(pDX, IDC_EDIT1, m_a);
	DDX_Text(pDX, IDC_EDIT2, m_b);
	DDX_Text(pDX, IDC_EDIT3, m_c);
	DDX_Text(pDX, IDC_EDIT4, m_d);
	DDX_Text(pDX, IDC_EDIT5, m_e);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CBiTreeDlg, CDialog)
	//{{AFX_MSG_MAP(CBiTreeDlg)
	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)
	ON_BN_CLICKED(IDC_BUTTON5, OnButton5)
	ON_BN_CLICKED(IDC_BUTTON6, OnButton6)
	ON_BN_CLICKED(IDC_BUTTON7, OnButton7)
	ON_BN_CLICKED(IDC_BUTTON8, OnButton8)
	ON_BN_CLICKED(IDC_BUTTON9, OnButton9)
	ON_BN_CLICKED(IDC_BUTTON11, OnButton11)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBiTreeDlg message handlers

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

void CBiTreeDlg::OnButton1() 
{
	// TODO: Add your control notification handler code here
    UpdateData(TRUE);
	CString temp;
	temp=m_a;
	if(m_a.IsEmpty())
		::AfxMessageBox("请输入建树所需要的先序序列！");
	else
		CreateBiTree(root,temp);
	
}

/*void CBiTreeDlg::OnButton10() 
{
	// TODO: Add your control notification handler code here

	m_e.Empty();
	CLevelOrderTraverse(root);
	UpdateData(FALSE);
	
}*/

void CBiTreeDlg::OnButton2() 
{
	// TODO: Add your control notification handler code here
    m_b.Empty();
	m_c.Empty();
	m_d.Empty();
	m_e.Empty ();
	UpdateData(FALSE);
	
}

void CBiTreeDlg::OnButton3() 
{
	// TODO: Add your control notification handler code here
    m_b.Empty();
	PreOrderTraverse(root);
	UpdateData(FALSE);
	
	
}

void CBiTreeDlg::OnButton4() 
{
	// TODO: Add your control notification handler code here
    m_c.Empty();
	InOrderTraverse(root);
	UpdateData(FALSE);
	
}

void CBiTreeDlg::OnButton5() 
{
	// TODO: Add your control notification handler code here
    m_d.Empty();
	PostOrderTraverse(root);
	UpdateData(FALSE);
	
}

void CBiTreeDlg::OnButton6() 
{
	// TODO: Add your control notification handler code here
    m_e.Empty();
	LevelOrderTraverse(root);
	UpdateData(FALSE);
	
}

void CBiTreeDlg::OnButton7() 
{
	// TODO: Add your control notification handler code here
    m_b.Empty();
	CPreOrderTraverse(root);
	UpdateData(FALSE);
	
	
}

void CBiTreeDlg::OnButton8() 
{
	// TODO: Add your control notification handler code here
    m_c.Empty();
	CInOrderTraverse(root);
	UpdateData(FALSE);
	
}

void CBiTreeDlg::OnButton9() 
{
	// TODO: Add your control notification handler code here
    m_d.Empty();
	CPostOrderTraverse(root);
	UpdateData(FALSE);
	
}

void CBiTreeDlg::OnButton11() 
{
	// TODO: Add your control notification handler code here
	CBiTreeDlg::OnCancel();
	
}