Borderou de evaluare (job #511955)

Eroare de compilare: user.cpp:4:14: error: variable 'std::ifstream cin' has initializer but incomplete type user.cpp:5:14: error: variable 'std::ofstream cout' has initializer but incomplete type user.cpp: In function 'int main()': user.cpp:9:3: error: reference to 'cin' is ambiguous user.cpp:4:11: error: candidates are: <typeprefixerror>cin /usr/include/c++/4.6/iostream:61:18: error: std::istream std::cin user.cpp:11:3: error: reference to 'cout' is ambiguous user.cpp:5:10: error: candidates are: <typeprefixerror>cout /usr/include/c++/4.6/iostream:62:18: error: std::ostream std::cout