Question

Define an action adder :: IO () that reads a given number of integers from the keyboard, one per line, and displays their sum. For example: $>$ adder How many numbers? 5 1 3 5 7 9 The total is 25 $>$ adder How many numbers? 5 1 3 5 7 9 The total is 25 Hint: start by defining an auxiliary function that takes the current total and how many numbers remain to be read as arguments. You will also likely need to use the library functions read and show.

   Define an action adder :: IO () that reads a given number of integers from the keyboard, one per line, and displays their sum. For example:
$>$ adder
How many numbers? 5
1
3
5
7
9
The total is 25
$>$ adder
How many numbers? 5
1
3
5
7
9
The total is 25
Hint: start by defining an auxiliary function that takes the current total and how many numbers remain to be read as arguments. You will also likely need to use the library functions read and show.

Programming in Haskell

Graham Hutton 2nd Edition

Chapter 10, Problem 4

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Step 1

Let's call this function `addNumbers`. ```haskell addNumbers :: Int -> Int -> IO () addNumbers total 0 = putStrLn ("The total is " ++ show total) addNumbers total remaining = do putStrLn "Enter a number:" input <- getLine let number = read input :: Show more…

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Define an action adder :: IO () that reads a given number of integers from the keyboard, one per line, and displays their sum. For example: $>$ adder How many numbers? 5 1 3 5 7 9 The total is 25 $>$ adder How many numbers? 5 1 3 5 7 9 The total is 25 Hint: start by defining an auxiliary function that takes the current total and how many numbers remain to be read as arguments. You will also likely need to use the library functions read and show.

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