Applying a haskell function to a .txt file in ghc?

I've currently wrote a program to use on a .txt file but whenever i try to run it i get the error:

cat quux.txt | ./wordCount

开发者_高级运维

<interactive>:1:14: parse error on input `|'  

Am i typing in my code wrong to work it on the ghc or?

---

You can't use shell syntax in ghci. You should type the command into the shell instead.

---

In ghci you can do

 :!<shell command>

To execute a command in the shell e.g.

Prelude> :!pwd
/home/me

---

You seem to be thinking GHCi is a shell, it isn't. There is no piping and no cat in GHCi.

Once you compile your program just do what you showed in a bash shell:

$ cat rotate.hs | ./rotate

ainm = od
c -< etContentsg
etl sl = inesl c
sw = apm ordsw sl
sr = apm map( ot)r sw
utStrLnp $ nlinesu $ apm nwordsu sr

otr w = ropd 1 w ++ aket 1 w