Bill Page wrote:
>
> Why does FriCAS print "n=13" in the following simple example of a
> nested function in the interpreter? There is no assignment to n.
>
> (1) -> )r test3.input
> gpp (p,n) ==
> -- nested function
> g(x,r,m,c) ==
> output("c=",c)
> output("n=",n)
> output("m=",m)
> if c = m then r else g(x-1,r*x,m,c+1)
> output("p=",p)
> output("n=",n)
> g(p,1,n,0)
>
> Type: Void
> -- test
> gpp(13,1)
>
> Compiling function g with type (Integer,Integer,Integer,Integer) ->
> Integer
> Compiling function gpp with type (PositiveInteger,PositiveInteger)
> -> Integer
> p= 13
> n= 1
> c= 0
> n= 1
> m= 1
> c= 1
> n= 13
> m= 1
>
> (2) 13
To get value of n the g function fetches second argument. But instead
of fetching second argument to gpp it fetches its own second argument...
--
Waldek Hebisch
[email protected]
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