次世代言語議論スレ[Go Rust Kotlin Scala]第4世代 [無断転載禁止]©2ch.net

import System.Environment

search w cts = search' (False,0) w cts
where
search' (b,n) _ [] = (b,n)
search' (_,n) w (c:cs) | take (length w) (c:cs) == w = search' (True,n + 1) w cs
search' t w (_,cs) = search' t w cs

search2 w cts = search' (False,0) w cts
where
search' (b,n) _ [] = (b,n)
search' (_,n) w cts | take (length w) cts == w = search' (True,n + 1) w $ drop (length w) cts
search' t w (_:cs) = search' t w cs

-- main = do 7777
-- (file:word:_) <- getArgs
-- content <- readFile file
-- print $ search word content

main = getArgs >>= \(file:word) -> readFile file >>= print.search word