14 lines
385 B
14 lines
385 B
2 years ago
|
|
||
|
|
Exercise 1.30: The sum procedure above
|
||
|
|
generates a linear recursion. The procedure can be rewritten so that the sum
|
||
|
|
is performed iteratively. Show how to do this by filling in the missing
|
||
|
|
expressions in the following definition:
|
||
|
|
|
||
|
|
|
||
|
|
(define (sum term a next b)
|
||
|
|
(define (iter a result)
|
||
|
|
(if ⟨??⟩
|
||
|
|
⟨??⟩
|
||
|
|
(iter ⟨??⟩ ⟨??⟩)))
|
||
|
|
(iter ⟨??⟩ ⟨??⟩))
|