hi all,
I'm new to haskell and just reading the "yet another haskell tutorial".I
got stuck on the exercise of chapter 3,the problem goes like "repeatedly
prompt the user to input some number until a zero is detected,then
output the sum,product of those numbers and the factorial of each
number." What I have done is I have an IO action up and running in a
module I defined as following:
module Main where
main = do
calculate
calculate = do
putStrLn "Give me a number (or 0 to stop):"
number <- getLine
let n = read number
if n == 0
then do
return []
else do
rest <- calculate
return (number : rest)
Now the question is I couldn't get any clue from the first three
chapters to do the remaining calculation,what I wanted to do is to get a
list out of the IO action I just defined, and do the sum,product and
factorial out of the list,I tried something like"list <- calculate, sum
list,etc,but it wasn't helpful,so would anyone just give me any hint to
solve this,sorry for those who feel its quite basic.
--
-------------------------------------------------------------------------------------------------------
If you didn't succeed at the first attempt, you are just about average.
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