Eroare de compilare: main.cpp: In member function 'void queue::push_back(int)': main.cpp:19:4: error: 'out' was not declared in this scope 19 | out << "pop(1) push(2," << st1.top() << ") "; | ^~~ main.cpp:22:3: error: 'out' was not declared in this scope 22 | out << "read(" << x << ") "; | ^~~ main.cpp: In member function 'int queue::pop_front()': main.cpp:34:3: error: 'out' was not declared in this scope 34 | out << "pop(1) write(" << x << ") "; | ^~~ main.cpp: In function 'int main()': main.cpp:44:2: error: 'in' was not declared in this scope; did you mean 'n'? 44 | in >> n; in.get(); | ^~ | n main.cpp:52:4: error: 'out' was not declared in this scope 52 | out << cnt << ": "; | ^~~ main.cpp:57:4: error: 'out' was not declared in this scope 57 | out << cnt << ": "; | ^~~ Non zero exit status: 1