Exercise 5.33 · 习题

Exercise 5.33: Consider the following definition
of a factorial procedure, which is slightly different from the one given above:

(define (factorial-alt n)
(if (= n 1)
1
(* n (factorial-alt (- n 1)))))

Compile this procedure and compare the resulting code with that produced for

factorial. Explain any differences you find. Does either program

execute more efficiently than the other?

练习 5.33：考虑下面这个阶乘过程的定义，它与上面给出的定义略有不同：

(define (factorial-alt n)
(if (= n 1)
1
(* n (factorial-alt (- n 1)))))

编译这个过程，并将所得代码与为 factorial 生成的代码加以比较。解释你发现的任何差异。两个程序中，哪个执行效率更高？