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二叉树实现源代码

 2008-03-08 12:43:56 来源:WEB开发网   
核心提示:二叉树实现源代码如下:#include <conio.h>#include <stdio.h>#include <stdlib.h>#define OK 1#define ERROR 0#define TRUE 1#define FALSE 0#define OVERFLOW -2t

  二叉树实现源代码如下:

#include <conio.h>
#include <stdio.h>
#include <stdlib.h>

#define OK 1
#define ERROR 0
#define TRUE 1
#define FALSE 0
#define OVERFLOW -2
typedef int status;

typedef strUCt BiNode
{
  char Data;
  struct BiNode* lChild;
  struct BiNode* rChild;
}BiNode,*pBiNode;

status CreateTree(BiNode** pTree);
status PReOrderTraval(BiNode* pTree);
status Visit(char Data);
status Display(BiNode* pTree,int Level);
status Clear(BiNode* pTree);

BiNode *pRoot=NULL;

main()
{
  clrscr();
  CreateTree(&pRoot);

  printf("\nPreOrder:");
  PreOrderTraval(pRoot);
  printf("\n");

  printf("\nInOrder:");
  InOrderTraval(pRoot);
  printf("\n");

  printf("\nPostOrder:");
  PostOrderTraval(pRoot);
  printf("\n");

  printf("\nShowLeaves:");
  ShowLeaves(pRoot);
  printf("\n-----------------------\n");
  printf("\n");

  Display(pRoot,0);

  printf("\n");
  printf("\nDeleting Tree:\n");
  DelTree(pRoot);
  printf("BiTree Deleted.");

  getch();
}
status CreateTree(BiNode** pTree) /*Input Example: abd##e##cf##g##*/
{
  char ch;
  scanf("%c",&ch);
  if(ch==‘#‘)
  {
    (*pTree)=NULL;
  }
  else
  {
    if(!((*pTree)=(BiNode*)malloc(sizeof(BiNode))))
    {
      exit(OVERFLOW);
    }

    (*pTree)->Data=ch;
    CreateTree(&((*pTree)->lChild));
    CreateTree(&((*pTree)->rChild));
  }
return OK;
}
status PreOrderTraval(BiNode* pTree)
{
  if(pTree)
  {
    if(Visit(pTree->Data))
    {
      if(PreOrderTraval(pTree->lChild))
      {
        if(PreOrderTraval(pTree->rChild))
        {
          return OK;
        }
      }
    }
    return ERROR;
  }
  else
  {
    return OK;
  }
}
status InOrderTraval(BiNode* pTree)
{
  if(pTree)
  {
    if(InOrderTraval(pTree->lChild))
    {
      if(Visit(pTree->Data))
      {
        if(InOrderTraval(pTree->rChild))
        {
          return OK;
        }
      }
      return ERROR;
    }
    return ERROR;

  }
  else
  {
    return OK;
  }
}
status PostOrderTraval(BiNode* pTree)
{
  if(pTree)
  {
    if(PostOrderTraval(pTree->lChild))
    {
      if(PostOrderTraval(pTree->rChild))
      {
        if(Visit(pTree->Data))
        {
          return OK;
        }
        return ERROR;
      }
    }
    return ERROR;
  }
  else
  {
    return OK;
  }
}
status Visit(char Data)
{
  printf("%c",Data);
  return OK;
}
status Display(BiNode* pTree,int Level)
{
  int i;
  if(pTree==NULL) return;
  Display(pTree->lChild,Level+1);
  for(i=0;i<Level-1;i++)
  {
    printf(" ");

Tags:实现 源代码

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