1、概述 huffman编码是一种可变长编码( VLC:variable length coding))方式,于1952年由huffman提出。依据字符在需要编码文件中出现的概率提供对字符的唯一编码,并且保证了可变编码的平均编码最短,被称为最优二叉树,有时又称为最佳编码。 2、原理 在了解huffman树为最优二叉树时,先要明确下面几个概念: 路径长度:树...
}voidHuffmanCoding(HTNode ht[],HTCode hc[],int n){// 构造Huffman树ht,并求出n个字符的编码char cd[N];int i,j,m,c,f,s1,s2,start;m=2*n-1;for(i=1;i<=m;++i){if(i<=n)ht[i].weight=hc[i].weight;elseht[i].parent=0;ht[i].parent=ht[i].lchild=ht[i].rchild=0;}for(i...
哈夫曼编码(Huffman Coding)哈夫曼编码 哈夫曼编码(Huffman Coding)是一种编码方式,哈夫曼编码是可变字长编码(VLC)的一种。Huffman于1952年提出一种编码方法,该方法完全依据字符出现概率来构造异字头的平均长度最短的码字,有时称之为最佳编码,一般就叫作Huffman编码。以哈夫曼树─即最优二叉树,带权路径长度最小的...
2.cpp(57) : error c2078: too many initializersint main() {HuffmanTree HT; HuffmanCode HC; int w[4]={1,5,6,3}; int n=4; int HuffmanCoding(HT, HC, w, n);<-出错行 for(int i=0;i<n;i++) printf("%s\n",HC[i]); printf("Hello World!\n"); return 0; }...
Compile-time Huffman coding compression using C++20 cppconstexprhuffman-codingcpp20 UpdatedOct 12, 2021 C++ drichardson/huffman Star108 Code Issues Pull requests huffman encoder/decoder compressionencoderhuffmanhuffman-codingeducational UpdatedApr 25, 2021 ...
Huffman_Coding(root->left,lcode); Huffman_Coding(root->right,rcode); } int main() { int freq[Nsymbols] = {0}; char *str = "this is the string need to be compressed"; //statistic character frequency while (*str!='\0')
map<char,Huff_code> Huff_Dic; //huffman coding dictionary class HTree { public : HTree* left; HTree* right; char ch; int weight; HTree(){left = right = NULL; weight=0;} HTree(HTree* l,HTree* r,int w,char c){left = l; right = r; weight=w; ch=c;} ...
[n]; cout<<"输入各个字母频率权值大小:"; for(int i=0;i<n;i++) cin>>p[i]; cout<<"___构造huffman树___"<<endl; HuffmanTree tree; HuffmanNode *HT; tree.Create_HuffmanTree(HT,p,n); cout<<"huffman树的结构为:"<<endl; tree.Traverse(HT,n); cout<<endl; tree.Huffman_Coding(HT...
4、huffman 代码(如下) // Huffman coding.cpp : 定义控制台应用程序的入口点。 //Copyright@Qyee, 2011-7-30 #include 'stdafx.h' #include <iostream> #include <Windows.h> using namespace std; //huffman tree 节点定义 typedef struct { int weight; //保存权值 int parent, lchild, ...
void HuffmanCoding();//对信源进行huffman编码 void CountTheSourceSignal(CFile*fp);//计算每种信源的种类和个数, //并且统计出信源总数 void SelectSmall(intcnt,int*s1,int*s2); void compress(CFile*fp);//对文件压缩 void CountTheSourceSignal(CFile*fp) ...