Need Scheme Help

[Anubis]

need help with this

Write a scheme function called substitute that takes three inputs (two atoms and a list) and returns the list modified so that each occurrence of the first atom is replaced by the second atom. For example: (substitute 'b 'c '(a b c b)) will evaluate to (a c c c). Store your code in the file substitute.s.

 

[UglyCasanova]

Anything in particular?

edit: I can't help you there, sorry.

 

[manly]

SICP is online.

 

[Ameesh]

sorry i only help with ML or LISP problems.

 

[z0mb13]

are you taking cs61a at berkeley??? or maybe cs 3???

edit: here is the answer

(define (subsitute a b ls)
(if ((eq a (car ls)))
(set-car! (car ls) b)
(subsitute a b (cdr ls)))

not 100% sure about the syntax though

 

[Anubis]

no its not me its for my roomate and we're not at UC berkley. we go to Dickinson College in Carlsile Pa. and hes in Programing Langurage structures. 300 level class

 

[z0mb13]

look at answer above