Thread: was not declared in this scope

Check the namespaces involved.

Um, obviously you search packet.hpp for namespace and see if the declaration is within a namespace.

Originally Posted by kotacoder

I am noob -.- when it comes to programming haha but I am learning slowly

Instead of trying to dive into an open source project, you might want to work through an introductory tutorial. I say this because "How do I go about that?" in response to "Check the namespaces involved." seems like a pretty weird response if you have learnt about namespaces, which is the kind of fundamental knowledge you need if you want to work on an existing open source project. I would have expected a "aha! I forgot that Sequence could be declared in a namespace, so let me look for it" as your mental response upon reading my reply.

Likewise, I can understand a mental mixup between Sequence and sequence, but once that was pointed out to you, I would have expected a "aha! I declared a variable named sequence, but I'm calling a function named Sequence, that's why the error message says 'not declared in this scope' rather than complaining about using function call syntax with an unsigned short variable".

And again, knowing that Sequence was declared in packet.hpp, you would not ask "how do I go about a forward declaration", because an introductory tutorial would have told you that that's what the header file is for.