Borderou de evaluare (job #548799)

Eroare de compilare: user.cpp: In function ‘void afis(int)’: user.cpp:10:20: error: reference to ‘cout’ is ambiguous user.cpp:4:10: error: candidates are: std::ofstream cout /usr/include/c++/4.6/iostream:62:18: error: std::ostream std::cout user.cpp:11:2: error: reference to ‘cout’ is ambiguous user.cpp:4:10: error: candidates are: std::ofstream cout /usr/include/c++/4.6/iostream:62:18: error: std::ostream std::cout user.cpp: In function ‘void back(int, int)’: user.cpp:15:6: warning: unused variable ‘j’ [-Wunused-variable] user.cpp: In function ‘int main()’: user.cpp:30:2: error: reference to ‘cin’ is ambiguous user.cpp:3:10: error: candidates are: std::ifstream cin /usr/include/c++/4.6/iostream:61:18: error: std::istream std::cin