Exercise 2.17 · 习题

Exercise 2.17: Define a procedure
last-pair that returns the list that contains only the last element of a
given (nonempty) list:

(last-pair (list 23 72 149 34))

(34)

练习 2.17：定义过程 last-pair，它返回只包含给定（非空）表中最后一个元素的表：

(last-pair (list 23 72 149 34))
(34)