HuffmanTree

 

 

 

 

 

 

 

 

 

 

 

 

 

 

// ThisIsMyCPP_Alternate.cpp : Defines the entry point for the console application.//HuffmanTree《数据结构》.严蔚敏.吴伟民.P147//电子批阅系统.Huffman 树//如有BUG，联系邮箱：[e-mail] ^@^///#include "stdafx.h"#include "stdlib.h"#include "stdio.h"#include <iostream>using namespace std;typedef char ** HuffmanCode;typedef struct{char *Character;HuffmanCode HC;int Array_Weight[26];int Length;}Huff_Pro;void InitHuff_Pro(Huff_Pro &Huff_Sol);void CreateHuff_Pro(Huff_Pro &Huff_Sol,int Amount);void PrintHuff_Pro(Huff_Pro Huff_Sol);void DestoryHC(HuffmanCode &HC,int Length);void DestoryHuff_Pro(Huff_Pro &Huff_Sol);typedef struct {int Weight;int parent,lchild,rchild;}HuffmanTreeNode,*HuffmanTree;void Select_Two_Min(HuffmanTree HT,int m,int &min1,int &min2); void InitHuffmanTree(HuffmanTree &HT,int Length,int *Array_Weight);void CreateHC(HuffmanCode &HC,HuffmanTree HT,int Length);int _tmain(int argc, _TCHAR* argv[]){int Amount = 0;Huff_Pro Huff_Sol;HuffmanTree HT = NULL;//scanf("%d",&Amount);cin>>Amount;getchar();InitHuff_Pro(Huff_Sol);CreateHuff_Pro(Huff_Sol,Amount);//未完全创造InitHuffmanTree(HT,Huff_Sol.Length,Huff_Sol.Array_Weight);CreateHC(Huff_Sol.HC,HT,Huff_Sol.Length);PrintHuff_Pro(Huff_Sol);DestoryHuff_Pro(Huff_Sol);system("PAUSE");return 0;}void InitHuff_Pro(Huff_Pro &Huff_Sol){Huff_Sol.Character = NULL;Huff_Sol.HC = NULL;Huff_Sol.Length = 0;}void CreateHuff_Pro(Huff_Pro &Huff_Sol,int Amount){int Data[26] = {0},max = 0,iTemp = 0;char s[27];char ch;for(int i = 0;i < Amount;i++){ch = getchar();Data[ch - 'A']++;getchar();}for(int i = 0;i < 26;i++){for(int j = 0; j < 26;j++){if(max < Data[j]){max = Data[j];iTemp = j;}}if(max == 0){s[i] = '/0';break;}else{s[i] = (char)(iTemp + 'A');Data[iTemp] = 0;Huff_Sol.Array_Weight[i] = max;max = 0;}}Huff_Sol.Length = strlen(s);Huff_Sol.Character = (char*)malloc(strlen(s) + 1);strcpy(Huff_Sol.Character,s);}void PrintHuff_Pro(Huff_Pro Huff_Sol){for(int i = 0;i < Huff_Sol.Length;i++){cout<<Huff_Sol.Character[i]<<' '<<Huff_Sol.Array_Weight[i]<<' '<<Huff_Sol.HC[i + 1]<<endl;//这里遇到了一个BUG^-^// cout<<Huff_Sol.Character[i]<<' '<<Huff_Sol.Array_Weight[i]<<endl;}}void DestoryHC(HuffmanCode &HC,int Length){for(int i = 1;i <= Length;i++){free(HC[i]);}free(HC);HC = NULL;}void DestoryHuff_Pro(Huff_Pro &Huff_Sol){free(Huff_Sol.Character);Huff_Sol.Character = NULL;DestoryHC(Huff_Sol.HC,Huff_Sol.Length);Huff_Sol.Length = 0;}void InitHuffmanTree(HuffmanTree &HT,int Length,int *Array_Weight){if(Length < 1){exit(EXIT_FAILURE);}int m = Length * 2 - 1;int i = 0;int min1,min2;HT = (HuffmanTree)calloc(m + 1,sizeof(HuffmanTreeNode));for(i = i + 1; i <= Length;i++){HT[i].lchild = 0;HT[i].parent = 0;HT[i].rchild = 0;HT[i].Weight = Array_Weight[i - 1];}for(;i <= m; i++){HT[i].lchild = 0;HT[i].parent = 0;HT[i].rchild = 0;HT[i].Weight = 0;}for(i = Length + 1;i <=m;i++){Select_Two_Min(HT,i - 1,min1,min2);//cout<<min1<<' '<<min2<<endl;HT[min1].parent = i;HT[min2].parent = i;HT[i].lchild = min1;HT[i].rchild = min2;HT[i].Weight = HT[min1].Weight + HT[min2].Weight;//cout<<HT[i].Weight<<endl;}}void Select_Two_Min(HuffmanTree HT,int m,int &min1,int &min2){//这一段代码要注意，不完善,有BUG.///Where is BUG?找不到呀~！int i =1 , iTemp = 0;while(HT[i].parent != 0){i++;if(i > m){exit(EXIT_FAILURE);}}iTemp = i;i++;while(HT[i].parent != 0 && i <= m){i++;if(i > m){exit(EXIT_FAILURE);}}if(HT[iTemp].Weight < HT[i].Weight){min1 = iTemp;min2 = i;}else{min2 = iTemp;min1 = i;}for(i++;i <= m;i++){if(HT[i].parent == 0 && HT[i].Weight <= HT[min1].Weight ){min2 = min1;min1 = i;}}}/**void Select_Two_Min(HuffmanTree HT,int m,int &min1,int &min2){//这段代码也有问题,不过比上面的要好一些(仅针对此题)int min = 0,iTemp,i;for(i = 1;i <= m;i++){if(HT[i].parent == 0 && HT[i].Weight != 0){if(min == 0 || min > HT[i].Weight){min = HT[i].Weight;iTemp = i;}}}min1 = iTemp;HT[iTemp].Weight = 0;min = 0;for(i = 1;i <= m;i++){if(HT[i].parent == 0 && HT[i].Weight != 0){if(min == 0 || min > HT[i].Weight){min = HT[i].Weight;iTemp = i;}}}min2 = iTemp;}**/void CreateHC(HuffmanCode &HC,HuffmanTree HT,int Length){int i ,start,c,f;char *cd;cd = (char*)malloc(Length*sizeof(char));cd[Length - 1] = '/0';HC = (HuffmanCode)malloc((Length + 1)*sizeof(char*));for(i = 1;i <= Length;++i){start = Length - 1;for(c = i,f = HT[i].parent;f != 0;c = f,f = HT[f].parent){if(HT[f].lchild == c){cd[--start] = '0';}else{cd[--start] = '1';}}HC[i] = (char*)malloc(strlen(&cd[start]) + 1);strcpy(HC[i],&cd[start]);//puts(HC[i]);}}

 

                                         有错误的，但却很好！