Exercise 6.4.1: (back)
;; A movie is a structure where title and producer are symbols (define-struct movie (title producer)) ;; A boyfriend is a structure where name, hair, eyes and phone are symbols (define-struct boyfriend (name hair eyes phone)) ;; A cheerleader is a structure where name is a symbol and number is a number (define-struct cheerleader (name number)) ;; A CD is a structure where artist and title are symbols and price is a number (define-struct CD (artist title price)) ;; A sweater is a structure where material and producer are symbols and size is a number (define-struct sweater (material size producer))