compress 与 uncompress

#include <iostream>using namespace std;#include "zlib.h"#define MaxBufferSize 1024*10int main(){int i;FILE* File_src;FILE* File_tmp;FILE* File_dest;unsigned long len_src;unsigned long len_tmp;unsigned long len_dest;unsigned char* buffer_src=new unsigned char[MaxBufferSize];unsigned char* buffer_tmp=new unsigned char[MaxBufferSize];unsigned char* buffer_dest=new unsigned char[MaxBufferSize];//r 以只读方式打开文件，该文件必须存在File_src=fopen("C:\\Users\\238\\Desktop\\a12.txt","r");//把文件的内容存到 buffer_src 中  返回读取元素的个数len_src=fread(buffer_src,sizeof(char),MaxBufferSize-1,File_src);for(int i=0;i<len_src;i++){cout<<buffer_src[i];}cout<<endl;//函数将 source 缓冲区中的内容压缩到 dest 缓冲区  从右向左compress(buffer_tmp,&len_tmp,buffer_src,len_src);//w 打开只写文件，若文件存在则文件长度清为0，即该文件内容会消失。若文件不存在则建立该文件。File_tmp=fopen("C:\\Users\\238\\Desktop\\a.txt","w");//把压缩后的内容写到File_tmp文件中fwrite(buffer_tmp,sizeof(char),len_tmp,File_tmp);for(int i=0;i<len_tmp;i++){cout<<buffer_tmp[i];}cout<<endl;//从右向左uncompress(buffer_dest,&len_dest,buffer_tmp,len_tmp);File_tmp=fopen("C:\\Users\\238\\Desktop\\a.txt","r");File_dest=fopen("C:\\Users\\238\\Desktop\\dest.txt","w");fwrite(buffer_dest,sizeof(char),len_dest,File_dest);for(int i=0;i<len_dest;i++){cout<<buffer_dest[i];}cout<<endl;return 0;}