Eroare de compilare: user.cpp: In function 'int main()': user.cpp:40: error: no match for 'operator^' in 'out.std::basic_ofstream<char, std::char_traits<char> >::<anonymous>.std::basic_ostream<_CharT, _Traits>::operator<< [with _CharT = char, _Traits = std::char_traits<char>](l) ^ c' /usr/include/c++/4.2/bits/ios_base.h:87: note: candidates are: std::_Ios_Fmtflags std::operator^(std::_Ios_Fmtflags, std::_Ios_Fmtflags) /usr/include/c++/4.2/bits/ios_base.h:127: note: std::_Ios_Openmode std::operator^(std::_Ios_Openmode, std::_Ios_Openmode) /usr/include/c++/4.2/bits/ios_base.h:165: note: std::_Ios_Iostate std::operator^(std::_Ios_Iostate, std::_Ios_Iostate)