Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:19: error: ‘class std::stack<int, std::deque<int, std::allocator<int> > >’ has no member named ‘push_back’ user.cpp:21: error: ‘poz’ was not declared in this scope user.cpp:26: error: name lookup of ‘i’ changed for ISO ‘for’ scoping user.cpp:26: note: (if you use ‘-fpermissive’ G++ will accept your code) user.cpp:28: error: ‘poz’ was not declared in this scope