CS代考程序代写 (define (sqrt x)
(define (sqrt x)
(define (square y)
(* y y))
(define (good-enough? guess)
(< (abs (- (square guess) x)) 0.001))
(define (average x y)
(/ (+ x y) 2))
(define (improve guess)
(average guess (/ x guess)))
(define (sqrt-iteration guess)
(if (good-enough? guess)
guess
(sqrt-iteration (improve guess))))
(sqrt-iteration 1.0 x))
(define (foo a)
(define (bar b)
(+ a b))
(bar (* a 2)))
(foo 3)
;(foo 3)
;(define (bar b)(+ 3 b)) (bar (* 3 2))
;(bar (* 3 2))
;(bar 6)
;(+ 3 6)
;9
(define (g x)
(define (f y)
(+ x y))
(+ (f 3)(f 4)))
(g 5)
;(g 5)
;(define (f y)(+ 5 y))(+ (f 3)(f 4))
;(+ (f 3)(f 4))
;(+ (+ 5 3)(+ 5 4))
;(+ 8 9)
;17
(define (outer x)
(define (middle y)
(define (inner x)
(+ x y))
(inner (+ x y)))
(middle (+ x 1)))
(outer 3)
