Exercise 2.18 · 习题

Exercise 2.18: Define a procedure reverse
that takes a list as argument and returns a list of the same elements in
reverse order:

(reverse (list 1 4 9 16 25))

(25 16 9 4 1)

练习 2.18：定义过程 reverse，它以一个表为参数，返回包含相同元素但顺序相反的表：

(reverse (list 1 4 9 16 25))
(25 16 9 4 1)