This program is intended to work as an observer design pattern's example, written as a TCP
Server that receives connections and notifies its clients whenever someone connects or
disconnects.
Just compile it running make on your console.
Almost as simple as before, just cd inside the project folder after compiling and ./server [PORT NUMBER].
By the moment you execute, the server will be listening for connections.
For fun, I use netcat to connect to this program which not only provides you with a client
fully capable of getting output sent from the server but also input from the client.
If you are testing on localhost all you have to do is having netcat installed and then:
nc localhost [PORT NUMBER]
The port number you choose must be the same than the one you choose for the server.