青岛专业网站建设推广报价,电子商务网站建设技术基础--asp.net程序设计教学大纲,wordpress文字黑提,网站升级建设招标公告一、哈夫曼树概念 哈夫曼树又称最优树给定N个权值作为N个叶子结点#xff0c;构造一棵二叉树#xff0c;若该树的带权路径长度达到最小#xff0c;称这样的二叉树为最优二叉树#xff0c;也称为哈夫曼树(Huffman Tree)。哈夫曼树是带权路径长度最短的树#xff0c;权值较大…一、哈夫曼树概念 哈夫曼树又称最优树给定N个权值作为N个叶子结点构造一棵二叉树若该树的带权路径长度达到最小称这样的二叉树为最优二叉树也称为哈夫曼树(Huffman Tree)。哈夫曼树是带权路径长度最短的树权值较大的结点离根较近。 例给定一个有序数组{3,5,6,9,10}构造出一个哈夫曼树如下 树的带权路径长度规定为所有叶子结点的带权路径长度之和记为WPL WPL (35)*4 6*3 9*2 10*1 98
二、实现代码
1、定义树结点
typedef struct huffmantreenode
{int* data;struct huffmantreenode* leftNode;struct huffmantreenode* rightNode;
} HuffmanTree;
2、声明函数操作
/***创建节点
*/
HuffmanTree* create_huffman_tree(int data);/*** 初始化哈夫曼根节点
*/
HuffmanTree* create_huffman_tree_root(int first,int second);/*** 新增节点
*/
void insert_huffmantree_node(HuffmanTree** tree,int data);/*** 前序遍历
*/
void pre_oder_huffmantree(HuffmanTree** tree);/*** 销毁树
*/
void destroy_huffmantree(HuffmanTree* tree);
3、函数定义 HuffmanTree* create_huffman_tree(int data)
{HuffmanTree* node malloc(sizeof(HuffmanTree*));if(nodeNULL){perror(节点点申请内存失败);return NULL;}node-data malloc(sizeof(int*));*(node-data) data;node-leftNode NULL;node-rightNode NULL;return node;
}HuffmanTree* create_huffman_tree_root(int first,int second)
{HuffmanTree* firstNode create_huffman_tree(first);HuffmanTree* secondNode create_huffman_tree(second);HuffmanTree* root create_huffman_tree(firstsecond);root-leftNode firstNode;root-rightNode secondNode;return root;
}void insert_huffmantree_node(HuffmanTree** tree,int data)
{HuffmanTree* root *tree;if(rootNULL){perror(初始结点为空);return;}int rootData *(root-data);HuffmanTree* node create_huffman_tree(data); HuffmanTree* newRoot create_huffman_tree(datarootData); bool isLeft rootDatadata;newRoot-leftNode isLeft?root:node;newRoot-rightNode isLeft?node:root;*tree newRoot;
}void pre_oder_huffmantree(HuffmanTree** tree)
{HuffmanTree* curNode *tree;if(curNodeNULL){return;}printf(前序遍历sort%d\n,*(curNode-data));pre_oder_huffmantree((curNode-leftNode));pre_oder_huffmantree((curNode-rightNode));
}void destroy_huffmantree(HuffmanTree* tree)
{if(treeNULL){return;}destroy_huffmantree(tree-leftNode);destroy_huffmantree(tree-rightNode);free(tree);
}
4、测试函数 void test_huffmantree()
{int arr[] {3,5,6,9,10};HuffmanTree* root create_huffman_tree_root(arr[0],arr[1]);int i 2;for(;i5;i){insert_huffmantree_node(root,arr[i]);}pre_oder_huffmantree(root);destroy_huffmantree(root);
}
