Eroare de compilare: user.cpp:3:13: error: variable ‘std::ifstream cin’ has initializer but incomplete type ifstream cin("densitate.in"); ^ user.cpp:4:14: error: variable ‘std::ofstream cout’ has initializer but incomplete type ofstream cout("densitate.out"); ^ user.cpp: In function ‘int main()’: user.cpp:9:2: error: reference to ‘cin’ is ambiguous cin>>n>>q; ^ user.cpp:3:10: note: candidates are: <typeprefixerror>cin ifstream cin("densitate.in"); ^ In file included from user.cpp:1:0: /usr/local/include/c++/4.8.0/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp:17:2: error: reference to ‘cin’ is ambiguous cin>>a>>b; ^ user.cpp:3:10: note: candidates are: <typeprefixerror>cin ifstream cin("densitate.in"); ^ In file included from user.cpp:1:0: /usr/local/include/c++/4.8.0/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp:23:2: error: reference to ‘cout’ is ambiguous cout<<nr<<"\n"; ^ user.cpp:4:10: note: candidates are: <typeprefixerror>cout ofstream cout("densitate.out"); ^ In file included from user.cpp:1:0: /usr/local/include/c++/4.8.0/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^