Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:23:8: error: cannot bind ‘std::basic_istream<char>’ lvalue to ‘std::basic_istream<char>&&’ f>>a>>b; ^ In file included from /usr/include/c++/4.8/fstream:38:0, from user.cpp:1: /usr/include/c++/4.8/istream:872:5: error: initializing argument 1 of ‘std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = bool [20000001]]’ operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x) ^ user.cpp:23:11: error: ‘b’ was not declared in this scope f>>a>>b; ^