The following are the basic commands to run a "macro" written with the ROOT package.
We will take as example the macro with the name "ExampleMacro.txt", which
i. makes some simple mathematical operations (to recall few basic C++ commands)
   in particular calculates the sum of the first N integerers
ii. creates a "TCanvas" object
iii. creates a "TH1F" histogram, fills it with gaussian numbers and draws it in the 
     canvas.

Let's assume you have installed (the last version of) ROOT in your computer.
Then to run the macro, follow these steps:
 - Create a folder e.g. "RootExample" in your Desktop.
 - Download the file "ExampleMacro.C" and put it in the "RootExample" folder.
 - Open a terminal and "cd" into the "RootExample" folder.
 - Now open ROOT by writing "root" in the terminal and pushing enter.
 - The ROOT interpreter is now open. You should see "root[0] " in the terminal.
 - Type .L ExampleMacro.C, press enter and wait until you see "root[1] ".
 - Now type main() and press enter. This command executes the macro and you should
   be able to see the plot of the histogram in the canvas and some writing in the terminal.

To execute the macro "ReplicaMethod_HandsOnSolved.C" that we used during the hands-on session,
follow exactly the same steps.

If you have any question, or if you would like to have other macro example feel free
to contact me at albi.kerbizi@ts.infn.it.

Enjoy! :)