Terminal not executing Ruby files

Question

I\'m pretty much entirely new to programming, so bear with me. I am on a Macbook Pro running 10.6.6.

At the beginning of the \"Learn to Program\" tutorial are these dir

Answer 1

Did you call your file Calc.rb and saved it as a rb file to. becouse then its called internaly. Calc.rb.rb
and be sure to run cmd from desktop :D