How to make a function file that displays a polynomial and accepts a specific command?

function lou(a,b,c)
fprintf('%dx^2 + %dx + %d =0 \n',a,b,c)
end

this is my code right now. how do i modify my code to make the command lou([a b c]) work?

Answer 1

[Rik]

Why do you want to call your function like that? lou(a, b, c) will already work.

Anyway:

function lou(a,b,c)
if nargin==1,c=a(3);b=a(2);a=a(1);end
fprintf('%dx^2 + %dx + %d =0 \n',a,b,c)
end

Answer 2

[KSSV]

val = lou(1,2,3,.2)

1x^2 + 2x + 3 =0 

val = 3.4400

function val = lou(a,b,c,x)
fprintf('%dx^2 + %dx + %d =0 \n',a,b,c)
val = a*x^2+b*x+c ;
end