Compilare: user.cpp: In function ‘int main()’: user.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (q.size() > maxLength) ~~~~~~~~~^~~~~~~~~~~ user.cpp:17:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%d", &numberOfElements); ^ user.cpp:19:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%llu", &element); ^