Starting with 04-2-books.rkt (from this week's examples), design the following functions:

;; inventory-total-value : LOB -> Number ;; GIVEN: a LOB ;; RETURNS: the value of all the copies on hand of all the books in the ;; given LOB ;; (inventory-total-value lob1) = 390 (begin-for-test (check-equal? (inventory-total-value empty) 0 "value of the empty inventory should have been 0") (check-equal? (inventory-total-value lob1) 390 "simple test")) ;; books-out-of-stock : LOB -> LOB ;; GIVEN: a list of books ;; RETURNS: a list of the books that are out of stock in the given LOB ;; Example: ;; (books-out-of-stock lob1) = ;; (list ;; (make-book "Shakespeare" "Hamlet" 0 2) ;; (make-book "Shakespeare" "Macbeth" 0 10))

Last modified: Tue Aug 12 10:47:05 Eastern Daylight Time 2014