$ git clone https://github.com/RomanVas30/Queue
Cloning into 'Queue'...
warning: redirecting to https://github.com/RomanVas30/Queue/
remote: Counting objects: 45, done.
remote: Compressing objects: 100% (35/35), done.
remote: Total 45 (delta 12), reused 0 (delta 0), pack-reused 0
Unpacking objects: 100% (45/45), done.
$ cd queue
$ g++ main.cpp queue.cpp -I. -std=c++11 -o queue-example
$ ./queue-example
1 2 3 4
1 2 3 4
1 2 3 4
true
4
5
true
5
5
Error!!!