Hi guys    I tried to unzip a file with code below which exactly like the example from boost.org, but it doesn't work  the example is in the link which is Zlib Filters | | | | Zlib Filters | | | I tried the code like the below try{     ifstream file("d:\\202012303333629003180526491.txt.zip", ios_base::in | ios_base::binary);     boost::iostreams::filtering_streambufboost::iostreams::input in;     in.push(boost::iostreams::zlib_decompressor());     in.push(file);      boost::iostreams::copy(in, cout);      return 0;}catch (const std::exception& error) { std::cerr << error.what() << std::endl; return (EXIT_FAILURE); } it's not working, it get exception when it excuted boost::iostreams::copy(in, cout); I got the  zlib error: iostream stream error exception thoughwhat wrong I have done though? thank you