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nimbuzz
 4 years ago
Create a Scheme function inorder? that consumes a list of numbers numlist and
produces true if the numbers in the list appear in nondecreasing order and false
otherwise. Nondecreasing order means each number in the list is not smaller than the
previous number in the list. Your function will produce true for a list of length 0 or
1. Numbers in the list can be repeated as long as they appear consecutively.
nimbuzz
 4 years ago
Create a Scheme function inorder? that consumes a list of numbers numlist and produces true if the numbers in the list appear in nondecreasing order and false otherwise. Nondecreasing order means each number in the list is not smaller than the previous number in the list. Your function will produce true for a list of length 0 or 1. Numbers in the list can be repeated as long as they appear consecutively.

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Narsat
 4 years ago
Best ResponseYou've already chosen the best response.3It's been waaay too long since I last used Scheme, but I think this is good approximation to the answer, maybe a few minor tweaks could make it right? Hopefully it points you in the right direction. (define (inorder? numlist) (if (null? (cdr numlist) #t (if (> (car numlist) (cadr numlist)) #f (inorder? (cdr numlist)))))

nimbuzz
 4 years ago
Best ResponseYou've already chosen the best response.0Thank u very much. But i didn get that. becuase i am new in scheme and our prof said that in assignment we can just use what we learned from lecture. but i am completely lost in it. Is there any way to do this with cond? can this be fine? (define (inorder numlist) (cond ((empty? numlist)true) ((>=(first numlist)(first (rest numlist)))true) ( (< (first numlist) (first(rest numlist)) ) false)))

Narsat
 4 years ago
Best ResponseYou've already chosen the best response.3Yeah, if I recall correctly, cond is an 'extended if' basically: (define (inorder? numlist) (cond ((empty? (cdr numlist)) #t) //if 'empty?' doesn't work, try with 'null?' ((> (car numlist) (cadr numlist)) #f) //i don't recall a 'first', but 'car' retrieves first element of a list (else (inorder? (cdr numlist)))))

nimbuzz
 4 years ago
Best ResponseYou've already chosen the best response.0oh i get that Thank you )
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