Any Haskellers here ?

See more:

Haskell

Hi all, just dipping my toes into the waters of Haskell and need some help parsing command line args ( yes I've googled ) the code below works perfectly but I would like to pass a value on the command line - there is a Haskell function called getArgs that returns a string list of all command line params but I can't work out how to retrieve an int from the list - where I say do query 3400 I would like to say ( as in C ) query atoi(arg[1]) - any Haskellers out there ?

import Database.HDBC.Sqlite3
import Database.HDBC
import System.Environment

main :: IO()
main =
     do query 3400


query :: Int -> IO ()
query id =
    do conn <- connectSqlite3 "library.db"
       r <- quickQuery' conn
            "SELECT id, name from contributors where id = ? ORDER BY id" [toSql id]

       -- Convert each row into a String
       let stringRows = map convRow r

       -- Print the rows out
       mapM_ putStrLn stringRows

       -- And disconnect from the database
       disconnect conn

    where convRow :: [SqlValue] -> String
          convRow [sqlid, sqlname] =
              show id ++ ": " ++ name
              where id = (fromSql sqlid)::Integer
                    name = case fromSql sqlname of
                             Just x -> x
                             Nothing -> "NULL"
          convRow x = fail $ "Unexpected result: " ++ show x