【转】C++ ZLib压缩与解压缩

 
  1. #include "stdafx.h"
  2. #include "zlib.h"
  3. #include <iostream>
  4. using namespace std;
  5. #pragma comment(lib,"zlib.lib")

  7. int _tmain(int argc, _TCHAR* argv[])
  8. {
  9.     int err;
  10.     Byte compr[200], uncompr[200]; //足够大
  11.     uLong comprLen, uncomprLen;
  12.     const char* hello = "1234567890"; //原文

  14.     uLong len = strlen(hello);// + 1;
  15.     comprLen = sizeof(compr) / sizeof(compr[0]);

  17.     err = compress(compr, &comprLen, (const Bytef*)hello, len);

  19.     if (err != Z_OK)
  20.     {
  21.         cerr << "压缩错误: " << err << 'n ';
  22.     }

  24.     cout << "原文长度: " << len << " 压缩后长度:" << comprLen << 'n ';
  25.     strcpy((char*)uncompr, "garbage ");

  27.     err = uncompress(uncompr, &uncomprLen, compr, comprLen);

  29.     if (err != Z_OK)
  30.     {
  31.         cerr << "解压错误: " << err << 'n ';
  32.     }

  34.     cout << " 原文长度:" << len << " 解压后长度:" << uncomprLen << 'n ';

  36.     if (strcmp((char*)uncompr, hello))
  37.     {
  38.         cerr << " 解压失败!!! ";
  39.     }
  40.     else
  41.     {
  42.         cout << " 解压成功:" << (char*)uncompr;
  43.     }

  45.     FILE *f= fopen("d:\b1.bin","wb");
  46.     fwrite(compr,comprLen,1,f);
  47.     fclose(f);

  49.     getchar();
  50.     return 0;
  51. }
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原文地址：https://www.cnblogs.com/black/p/5171881.html