A2Pro THPT Buôn Ma Thuột [2007-2010]


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A2Pro THPT Buôn Ma Thuột [2007-2010]

Thành lập năm 2008, từng là một diễn đàn lớp với tất cả tình cảm mình gửi gắm vào. Giờ đây là nơi lưu trữ những thứ lặt vặt mình lượm lặt được trong học tập, công việc và cuộc sống !


CTDL - Tree

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FR
Silver Dragon
Silver Dragon

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Status Status : Sẽ ra sao nếu như, tao là mày và mày là tao ?

CTDL - Tree

Bài gửi by FR on 18/10/2012, 08:46

Code:
#ifndef __TREESAMPLE__H__
#define __TREESAMPLE__H__

#include "stdio.h"
#include "iostream.h"

enum Error_code {success,fail,rangeerror,overflow,not_present,
                dupplicated,found};

//---------------------------------------------------------
class Node {
public:
    int data;
    Node *left, *right;
    Node();
    Node(int );
    Node(int item, Node * left, Node * right);
};

//---------------------------------------------------------
class Tree {
public:
    Tree();
    ~Tree();
   
    bool empty();
//    int size();
    Error_code insertAt(Node *, bool, int, Node **);
    void printLNR();
//    void printLRN();
//    void printNLR();

protected:
    Node *root;
    void destroy(Node *);
    void printLNR_recursive(Node *);
};

#endif //__TREESAMPLE__H__

Code:


#include "stdafx.h"

//---------------------------------------------------------
Node::Node() {
    left = right = NULL;
}
//---------------------------------------------------------
Node::Node(int item) {
    this->data = item;
    left = right = NULL;
}
//---------------------------------------------------------
Node::Node(int item, Node* left, Node*right) {
    this->data = item;
    this->left = left;
    this->right = right;
}
//---------------------------------------------------------
Tree::Tree() {
    root = NULL;
}
//---------------------------------------------------------
Tree::~Tree() {
    destroy(root);
    root = NULL;
}
//---------------------------------------------------------
void Tree::destroy(Node *root) {
    if (root != NULL) {
        destroy(root->left);
        destroy(root->right);
        delete root;
    }
}
//---------------------------------------------------------
//Tree::size() {
//}
//---------------------------------------------------------
Error_code Tree::insertAt(Node *parent, bool left_or_right, int x, Node **new_node) {
    //This method make a new node of value x and insert into the left or the right of the parent node.
    //If the parent is NULL, and the root of the tree is NULL, the new node becomes the root of the tree
    //If the parent is not NULL, and the left_or_right is true (false), and the left (right) child of parent is NULL,
    //the new node is added to the left (right) of the parent
    //The return value is success for those cases and the new_node points to the new node.
    //Otherwise, the return value is fail and the new_node is unchanged
    if ((parent == NULL) && (root != NULL))
        return fail;
    if ((parent!=NULL ) && (    (left_or_right &&  (parent->left != NULL))
                            || (!left_or_right && (parent->right != NULL))   
                          )
        )
        return fail;

    *new_node = new Node(x);
    if (parent == NULL){
        root = *new_node;
    } else {
        if (left_or_right)
            parent->left = *new_node;
        else
            parent->right = *new_node;
    }
    return success;
}

//---------------------------------------------------------
bool Tree::empty() {
    return (root==NULL);
}
//---------------------------------------------------------
void Tree::printLNR_recursive(Node *root) {
    if (root != NULL) {
    printLNR_recursive(root->left);
    cout << root->data << " ";
    printLNR_recursive(root->right);
    }
}

//---------------------------------------------------------
void Tree::printLNR() {
    printLNR_recursive(root);
}


Code:
// TestTree.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

void main() {
    Tree aTree;
    Node *p1, *p2, *p3, *p4, *p5, *p6, *p7, *p8, *p9, *p10;
    aTree.insertAt(NULL, true, 3, &p1);
    aTree.insertAt(p1, true, 5, &p2); 
    aTree.insertAt(p1, false, 26, &p3);
    aTree.insertAt(p2, true, 14, &p4); 
    aTree.insertAt(p2, false, 7, &p5); 
    aTree.insertAt(p3, true, 6, &p6); 
    aTree.insertAt(p5, true, 11, &p7); 
    aTree.insertAt(p6, true, 22, &p8); 
    aTree.insertAt(p6, false, 190, &p9); 
    aTree.insertAt(p7, true, 19, &p10); 
    /* At this point, the tree is
              3
            /  \
          5      26
          / \    /
        14    7    6   
            /    / \
          11  22  190
          /
        19
    */
    aTree.printLNR();  //the result: 14 5 19 11 7 3 22 6 190 26
}

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