[julia-users] Beginner Julia user

[David Romero Chamorro]

Hi all,
I'm beginning to program with Julia so I don't know many..   
I want to Implement a function roots , that when yo do: "ys=roots(p)", returns 
to ys the real roots of a the polynomial p.
The function has to find the roots using the Sturm's theorem or the 
Descartes' rules.
Can anybody help me ?