;; The first three lines of this file were inserted by DrRacket. They record metadata
;; about the language level of this file in a form that our tools can easily process.
#reader(lib "htdp-beginner-reader.ss" "lang")((modname 20.5.1) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ())))
; Worked exercise 20.5.1

; diagonal-point : number -> posn

(check-expect (diagonal-point 0) (make-posn 0 0))
(check-expect (diagonal-point 3.7) (make-posn 3.7 3.7))

(define (diagonal-point coord)
  ; coord      a number     3.7
  ; should be  a posn       (make-posn 3.7 3.7)
  (make-posn coord coord)
  )