Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:79: error: no matching function for call to ‘std::basic_ifstream<char, std::char_traits<char> >::open()’ /usr/include/c++/4.4/fstream:525: note: candidates are: void std::basic_ifstream<_CharT, _Traits>::open(const char*, std::_Ios_Openmode) [with _CharT = char, _Traits = std::char_traits<char>] user.cpp:79: error: no matching function for call to ‘std::basic_ofstream<char, std::char_traits<char> >::open()’ /usr/include/c++/4.4/fstream:696: note: candidates are: void std::basic_ofstream<_CharT, _Traits>::open(const char*, std::_Ios_Openmode) [with _CharT = char, _Traits = std::char_traits<char>]