Eroare de compilare: user.cpp:3: error: no matching function for call to ‘std::basic_istream<char, std::char_traits<char> >::basic_istream(const char [9])’ /usr/include/c++/4.4/istream:581: note: candidates are: std::basic_istream<_CharT, _Traits>::basic_istream() [with _CharT = char, _Traits = std::char_traits<char>] /usr/include/c++/4.4/istream:91: note: std::basic_istream<_CharT, _Traits>::basic_istream(std::basic_streambuf<_CharT, _Traits>*) [with _CharT = char, _Traits = std::char_traits<char>] /usr/include/c++/4.4/iosfwd:53: note: std::basic_istream<char, std::char_traits<char> >::basic_istream(const std::basic_istream<char, std::char_traits<char> >&)