Welcome to MzScheme v4.1.4 [3m], Copyright (c) 2004-2009 PLT Scheme Inc.
> (load "third.scm")
reference to undefined identifier: spam

 === context ===
/Applications/PLTScheme/collects/scheme/private/misc.ss:74:7

> (load "third.scm")
#t
> (load "third.scm")
#t
> (third spam)
reference to undefined identifier: spam

 === context ===
/Applications/PLTScheme/collects/scheme/private/misc.ss:74:7

> (define spam (list 1 2 3)))
> stdin::96: read: unexpected `)'

 === context ===
/Applications/PLTScheme/collects/scheme/private/misc.ss:74:7

> (define spam (list 1 2 3))
> (third spam)
3
> define third (lambda (alist)
		(car (cdr (cdr alist)))))
stdin::138: define: bad syntax in: define

 === context ===
/Applications/PLTScheme/collects/scheme/private/kw.ss:611:2
/Applications/PLTScheme/collects/scheme/private/misc.ss:74:7

> #<procedure:third>
> #<procedure>
> stdin::193: read: unexpected `)'

 === context ===
/Applications/PLTScheme/collects/scheme/private/misc.ss:74:7

> (define third (lambda (alist)

		(car (cdr (cdr alist)))))
> (load "third.scm")
> (test-third)
#t
> (define a (list 1 2 3))
> a
(1 2 3)
> (define b (cons 4 (cdr a)))
> b
(4 2 3)
> a
(1 2 3)
> ()
stdin::345: #%app: missing procedure expression; probably originally (), which is an illegal empty application in: (#%app)

 === context ===
/Applications/PLTScheme/collects/scheme/private/misc.ss:74:7

> '()
()
> 'a
a
> 2
2
> a
(1 2 3)
> 'a
a
> ()
stdin::362: #%app: missing procedure expression; probably originally (), which is an illegal empty application in: (#%app)

 === context ===
/Applications/PLTScheme/collects/scheme/private/misc.ss:74:7

> '()
()
> empty
()
> (cons 2 '())
(2)
> (cons 4 (cons 2 '()))
(4 2)
> (cons a (cons 4 (cons 2 '())))
((1 2 3) 4 2)
> (define c (cons a (cons 4 (cons 2 '()))))
> c
((1 2 3) 4 2)
> a
(1 2 3)
>