Borderou de evaluare (job #515896)

Eroare de compilare: user.cpp: In function 'int main()': user.cpp:55:5: error: reference to 'cin' is ambiguous user.cpp:45:10: error: candidates are: std::ifstream cin /usr/include/c++/4.6/iostream:61:18: error: std::istream std::cin user.cpp:58:9: error: reference to 'cin' is ambiguous user.cpp:45:10: error: candidates are: std::ifstream cin /usr/include/c++/4.6/iostream:61:18: error: std::istream std::cin user.cpp:63:13: error: reference to 'cin' is ambiguous user.cpp:45:10: error: candidates are: std::ifstream cin /usr/include/c++/4.6/iostream:61:18: error: std::istream std::cin user.cpp:80:9: error: reference to 'cout' is ambiguous user.cpp:46:10: error: candidates are: std::ofstream cout /usr/include/c++/4.6/iostream:62:18: error: std::ostream std::cout