Compilare: user.cpp: In function ‘int main()’: user.cpp:33:13: warning: unused variable ‘x’ [-Wunused-variable] int x=deq.back(),y=deq.front(); ^ user.cpp:33:26: warning: unused variable ‘y’ [-Wunused-variable] int x=deq.back(),y=deq.front(); ^ user.cpp:21:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("deque.in", "r", stdin); ^ user.cpp:22:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ", &n, &k); ^ user.cpp:27:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &x); ^