哈夫曼编码解码实验报告

WordWord文档哈夫曼编码解码实验.实验要求掌握二叉树的相关概念掌握构造哈夫曼树，进行哈夫曼编码。对编码内容通过哈夫曼树进行解码。.实验内容通过二叉树构造哈夫曼树，并用哈夫曼树对读取的txt文件进行哈夫曼编码。编码完成后通过哈夫曼树进行解码。#include<stdio.h>#include<string.h>#defineMAX100//定义哈夫曼树的存储结构typedefstruct{chardata;intweight;intparent;intlch;intrch;}HuffNode;//定义哈夫曼编码的存储结构typedefstruct{charbit[MAX];intstart;}HuffCode;HuffNodeht[2*MAX];HuffCodehcd[MAX];intCoun[127]={0};intn;chars1[200000];chartext[5000];//构造哈夫曼树voidHuffmanTree(){inti,jKleft,right,min1,min2;//printf("输入叶子的节点数：")；〃scanf("%d",&n);printf("字符数量=%d\n",n);for(i=1;i<=2*n-1;i++){ht[i].parent=ht[i].lch=ht[i].rch=0;}j=0；for(i=1;i<=n;i++){/*getchar();printf("输入第%d个叶子节点的值：",i);scanf("%c",&ht[i].data);printf("输入该节点的权值：");scanf("%d",&ht[i].weight);*/for(;j<127;j++){if(Coun[j]!=0){ht[i].data=j;〃printf("%c",ht[i].data);ht[i].weight=Coun[j];〃printf("%d",ht[i].weight);break;}}j++;}printf("\n");for(i=1;i<=n;i++){printf("%c",ht[i].data);}printf("\n");for(i=n+1;i<=2*n-1;i++){//在前n个结点中选取权值最小的两个结点构成一颗二叉树min1=min2=10000;〃 为min1和min2设置一个比所有权值都大的值left=right=0;for(k=1;k<=i-1;k++)if(ht[k].parent==0)//若是根结点//令mini和min2为最小的两个权值，left和right为权值最小的两个结点位置if(ht[k].weight<min1){min2=min1;right=left;min1=ht[k].weight;left=k;}elseif(ht[k].weight<min2){min2=ht[k].weight;right=k;}}ht[left].parent=i;ht[right].parent=i;ht[i].weight=ht[left].weight+ht[right].weight;ht[i].lch=left;ht[i].rch=right;}}//构造哈夫曼编码voidHuffmanCode(){inti,c,k,f;HuffCodecd;for(i=1;i<=n;i++){cd.start=n;c=i;f=ht[i].parent;while(f!=0){if(ht[f].lch==c)cd.bit[cd.start]='0';elsecd.bit[cd.start]='1';cd.start--;c=f;f=ht[f].parent;}hcd[i]=cd;}printf("输出哈夫曼编码：\n");for(i=1;i<=n;i++){printf("%c:",ht[i].data);for(k=hcd[i].start+1;k<=n;k++)printf("%c",hcd[i].bit[k]);printf("\n");}}//对字母进行编码voidCode()〃将字符与相应的哈夫曼编码进行匹配，输出编码结果{inti=0,j,k,h=0;while(text[i]!='\0'){for(j=1;j<=n;j++){if(text[i]==ht[j].data){for(k=hcd[j].start+1;k<=n;k++){s1[h]=hcd[j].bit[k];h++;}break;}}i++；}//printf("编码\n");//puts(s1);〃printf("\n");}〃解码voidHuffmanDecode(){printf("解码\n");intlen,i,f;charC;//charS[MAXCODE];〃scanf("%s",S);〃使用gets()直接跳过len=strlen(s1);printf("s1:%d\n",len);f=2*n-1;for(i=0;i<len;i++){if(s1[i]=='0'){f=ht[f].lch;if(ht[f].lch==0&&ht[f].rch==0){C=ht[f].data;printf("%c",C);f=2*n-1;}}elseif(s1[i]=='1'){f=ht[f].rch;if(ht[f].lch==0&&ht[f].rch==0){C=ht[f].data;printf("%c",C);f=2*n-1;}}}printf("\n");}//统计字母个数及其权值voidCount(){inti,j,m；n=0;i=0;//printf("请仅输入小写字母\n");〃例程本省存在一个 BUG,只输入一个字母不能进行编码(并未解决)〃scanf("%s",s);while(text[i]!='\0')〃使用ASCII码表进行统计{m=text[i];〃printf("%d'n",m);Coun[m]++;i++；}for(j=0;j<127;j++){if(Coun[j]!=0)n++;}}//markCodevoidmain(){intl=0;FILE*fp;fp=fopen("text.txt","r");if(fp==NULL){printf("文件打开失败\n");while(1);}while(!feof(fp)){text[l]=fgetc(fp);l++;}printf("输入文本\n");printf("%s\n",text);fclose(fp);Count();

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口工4自野门主忆让r 口工4自野CllJjlfl进行哈夫曼编码对文本进行编码■■■ ,1NDOWSVsysteri32\cmd,exe3,cni,J_10101000011001001100M0001100in0000011111100IIOIIIOOIIOOLIIOIIIOOIIIIIOOOOIOIOOOLlllOllOOOOOOLOllllllllOllLOllllOOOlllOOOOOllOOOlOClOllOOOlO'XlllOllOlOlOlOlllOO1L10100D101110011000001100010001100011101111111L100Q1DQILL10LOOD1110010000111110IIOIOOIOOIIOOOIOOOIIDQOIIIOIIIIIIIIWOOIOOOOIOIOOIIOIIIWIOOOIIIIOIIIIL^^MoiooiiiDOOOiirnioiioioooioiiiooiioooQOQiioioioaoioiiDiiiooioionoiiiooiiDOioooilOlllllllOlOllOOlOOlOllllOlOllOlOOOlOlOOUOllllOLOOOlllOlOlOlOlOlllltllOOllOOOlOOthLlOOllDlOlOlOllllllllllllOlimiOlOlLlJOl100111011111011001100010001100100001101F10101101111001100L0111001W000311000100011001010100011010L10111D111L11111D111100FOOlllOlllllOllOOlOlOOOllllOllO^OOOlOlOOllOUllOLOOOOlDOllLOlClOlOlOLllllllllOlll□OlllllDOOQlllOlOLOWlOlllllllQOllQOUlOODllOQlULOOllUlllWUClLllllllLlOlUllllOlOOOLUOOIDIIOOIIOOOOOIDIOOO111101lOOOOOLlOlOlOllllOlllOOC11LOOllOOlOlOlOtlOlOlOOlOpilllOODOllOOOLOOOlllllllOllOOlQlOOQOOllOOlllXOllOllllllOOOlOOllOOUlOOlllOlOlOlOOlOlllOOllOOOOOUOOCUCiOOlLlllllOllOOlOlOOllOlLllOlODOllLOOOllDnilllOOOlOOllOqILllOlDDaiDlOOOllllOllOOOOOllOliOlOlllOlODlOOllOOOlOOlDllllOOOOllOOOlOOOllDOllLOdPIWIIHIIOOOIOOIIQODQIOIQOIIOIIIIOIOOOIIIIOOIIIOIIIIDIIOOOIIIODIIOOIOIIIOOIIOOO10001000110011010011010110110111111110111100011100000110001000110011WOO11D111111pOOlOOllOUQCIllLlOllllllllllDlOlOlOQOOllODOlOOCillOOlUUDlOlllllllOlOllOOLOOlOlinulOllOlOllllOlOOOlOlOOOllllOllOXiOOOlOLlllOlllllOOOlllOOOOLllOOOOOllOOOlOOOllOOllEioooiioiiiiiioooiooiiQOOoioioioiioociiQiiioiQiioiiiooinoioioKoioiiiooiiof)ooo]ioOQlOOOllOOlQOOlOlllllllOlCilLOCilOOlOllLlOKllOlOOOOlCODllOQOlOllllOlLllLOODllK'OQOLllDOODOlOlOlOllOOll101111110^01001100111101010101010011LOOinilOOllOOOOOllOOOlOpOlllllllOllOOlOlOOllOllllOlOO^llOlOlOinilOOlLlOlllDOllIllOOlllOOllOOlOlllOOll/OOOOCJllDOOlOOOlllllllOllOOlDlOJllOllllOlDOOOlOlOOlllOllllLllOOlllOlLlOOllLllOOll1微轼骈音半：输出解码结果

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