赫夫曼编译码器-数据结构课程设计 第3页
else
{
go(p->llink);
go(p->rlink);
}
}
void code(void)
{
FILE *fp1,*fp2,*fp3;
char ch1,ch2,c;
if((fp1=fopen("c:\\hfmtree.wxl","rb"))==NULL)
{
puts("文件打开错误！");
getchar();
exit(0);
}
if((fp2=fopen("c:\\tobetrans.txt","rb"))==NULL)
{
puts("文件打开错误！");
getchar();
exit(0);
}
if((fp3=fopen("c:\\codefile.wxl","wb"))==NULL)
{
puts("文件打开错误！");
getchar();
exit(0);
}
while((ch1=fgetc(fp2))!=EOF)
{
t=0;
while((ch2=fgetc(fp1))!=EOF)
{
if(ch1==ch2)
{
while((c=fgetc(fp1))!=')')
{
tmpcode[t++]=c;
}
tmpcode[t]='\0';
fputs(tmpcode,fp3);
fputc('@',fp3);
rewind(fp1);
break;
}
}
}
fclose(fp1);
fclose(fp2);
fclose(fp3);
}
void decode(void)
{
FILE *fp1,*fp2,*fp3;
char ch1,ch2,ch3;
char temp_3[20];
char temp_1[20];
int t1,t3;
if((fp1=fopen("c:\\hfmtree.wxl","rb"))==NULL)
{
puts("文件打开错误！");
getchar();
exit(0);
}
if((fp2=fopen("c:\\textfile.txt","wb"))==NULL)
{
puts("文件打开错误！");
getchar();
exit(0);
}
if((fp3=fopen("c:\\codefile.wxl","rb"))==NULL)
{
puts("文件打开错误！");
getchar();
exit(0);
}
while((ch3=fgetc(fp3))!=EOF)
{
t3=0;
while(ch3!='@')
{
temp_3[t3++]=ch3;
ch3=fgetc(fp3);
}
temp_3[t3]='\0';
while((ch1=fgetc(fp1))!=EOF)
{
if(isalpha(ch1))
{
ch2=ch1;
t1=0;
while((ch1=fgetc(fp1))!=')')
{
temp_1[t1++]=ch1;
}