Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:5:2: error: ‘queue’ was not declared in this scope queue <int> k; ^ user.cpp:5:2: note: suggested alternative: In file included from /usr/local/include/c++/4.8.0/queue:64:0, from user.cpp:1: /usr/local/include/c++/4.8.0/bits/stl_queue.h:93:11: note: ‘std::queue’ class queue ^ user.cpp:5:9: error: expected primary-expression before ‘int’ queue <int> k; ^ user.cpp:5:9: error: expected ‘;’ before ‘int’ user.cpp:6:2: error: ‘k’ was not declared in this scope k.push(6); ^ user.cpp:7:6: warning: unused variable ‘a’ [-Wunused-variable] int a=k.front(); ^