Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:20: error: reference to ‘cin’ is ambiguous user.cpp:5: error: candidates are: std::ifstream cin /usr/include/c++/4.4/iostream:58: error: std::istream std::cin user.cpp:20: error: reference to ‘cin’ is ambiguous user.cpp:5: error: candidates are: std::ifstream cin /usr/include/c++/4.4/iostream:58: error: std::istream std::cin user.cpp:37: error: reference to ‘cout’ is ambiguous user.cpp:6: error: candidates are: std::ofstream cout /usr/include/c++/4.4/iostream:59: error: std::ostream std::cout user.cpp:37: error: reference to ‘cout’ is ambiguous user.cpp:6: error: candidates are: std::ofstream cout /usr/include/c++/4.4/iostream:59: error: std::ostream std::cout user.cpp:38: error: ‘system’ was not declared in this scope