Eroare de compilare: In file included from /usr/include/c++/4.8/iostream:39:0, from user.cpp:1: /usr/include/c++/4.8/ostream: In function ‘int main()’: /usr/include/c++/4.8/ostream:384:7: error: ‘std::basic_ostream<_CharT, _Traits>::basic_ostream() [with _CharT = char; _Traits = std::char_traits<char>]’ is protected basic_ostream() ^ user.cpp:15:10: error: within this context ostream outfile; ^ user.cpp:16:10: error: ‘std::ostream’ has no member named ‘open’ outfile.open ("adunare.out"); ^ user.cpp:18:10: error: ‘std::ostream’ has no member named ‘close’ outfile.close(); ^