#include <string.h>

       #include <openssl/comp.h>

       int    main()

       {

              COMP_CTX          *ctx;

              int                  len,olen=100,ilen=50,i,total=0;

              unsigned charin[50],out[100];

              unsigned charexpend[200];

      

       #ifdef      _WIN32

              ctx=COMP_CTX_new(COMP_rle());

       #else

              /* for linux */

              ctx=COMP_CTX_new(COMP_zlib());

       #endif

              for(i=0;i<50;i++)

                     memset(&in[i],i,1);

              total=COMP_compress_block(ctx,out,olen,in,50);

              len=COMP_expand_block(ctx,expend,200,out,total);

              COMP_CTX_free(ctx);

              return 0;

       }