  Exercise 1.4
  Operators can be compound expressions .
; Based on the value of parameter b operator is determined.
(define (a-plus-abs-b a b)
  ((if (> b 0) + -) a b))

 Based on the value of parameter b operator is determined.
  Exercise 1.4
  Operators can be compound expressions .
(define (a-plus-abs-b a b)
  ((if (> b 0) + -) a b))
