Answered: Haskell 1. Show how the meaning of the…

Haskell 1. Show how the meaning of the following curried function definition can be formalized in terms of lambda expressions: mult :: Int -> Int -> Int -> Int mult x y z = x * y * z

C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter12: Adding Functionality To Your Classes

Section12.1: Providing Class I/o Capabilities

Problem 6E

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Question

Haskell 1. Show how the meaning of the following curried function definition can be formalized in terms of lambda expressions: mult :: Int -> Int -> Int -> Int mult x y z = x * y * z 2. A positive integer is "perfect" if it equals the sum of all of its factors, excluding the number itself. Using a list comprehension and the function "factors", define a function "perfects :: Int -> [Int]" that returns the list of all perfect numbers up to a given limit. For example (in GHCi): > perfects 500 [6,28,496] Note that "factors" is just: factors :: Int -> [Int] factors n = [x | x Bool" which returns "True" if the given "Int" is perfect, and "False" otherwise. Then use "isperfect" as a guard in a list comprehension to filter out all of the non-perfect integers (i.e., to keep only the perfect integers).

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