Question

;;
;; NOTE: Do not attempt to solve this problem until you have covered
;; the How to Design Functions (HtDF) design recipe in lecture.
;;
;; Design a function called taller-image that consumes two images and produces
;; the image that has the greater height.
;;
;; Note that the template tag for a function that consumes two images is:
;;
;; (@template Image)
;;
;; and the template itself is:
;;
;; (define (taller-image i1 i2)
;; (... i1 i2))
;;

;(@htdf taller-image) ;Uncomment this line when you start the problem.

Answer 1

Ans:-

The HtDF recipe consists of the following steps:

Signature, purpose and stub.
Define examples, wrap each in check-expect.
Template and inventory.
Code the function body.
Test and debug until correct
The first step of the recipe is to identify the inherent structure of the information.

Once that is done, a data definition consists of four or five elements:

A possible structure definition (not until compound data)
A type comment that defines a new type name and describes how to form data of that type.
An interpretation that describes the correspondence between information and data.
One or more examples of the data.
A template for a 1 argument function operating on data of this type.
In the first weeks of the course we also ask you to include a list of the template rules used to form the template.

;; Time is Natural
;; interp. number of clock ticks since start of game

(define START-TIME 0)
(define OLD-TIME 1000)

#;
(define (fn-for-time t)
(... t))

;; Template rules used:
;; - atomic non-distinct: Natural
;; Countdown is Integer[0, 10]
;; interp. the number of seconds remaining to liftoff
(define C1 10) ; start
(define C2 5) ; middle
(define C3 0) ; end

#;
(define (fn-for-countdown cd)
(... cd))

;; Template rules used:
;; - atomic non-distinct: Integer[0, 10]
(define (fn-for-tlcolor ls)
(cond [Q1 A1]
[Q2 A2]
[Q3 A3]))

NOTE:- please like bro,any doubts please comment