Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:9:5: error: reference to ‘cin’ is ambiguous cin>>n; ^ user.cpp:4:10: note: candidates are: std::ifstream cin ifstream cin("fractii.in"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:60:18: note: std::istream std::cin extern istream cin; /// Linked to standard input ^ user.cpp:18:5: error: reference to ‘cout’ is ambiguous cout<<2*nr+1<<'\n'; ^ user.cpp:5:10: note: candidates are: std::ofstream cout ofstream cout("fractii.out"); ^ In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:61:18: note: std::ostream std::cout extern ostream cout; /// Linked to standard output ^