On Mon, Aug 8, 2011 at 1:45 PM, Ertugrul Soeylemez
<es@ertes.de> wrote:
> module Main where
> import Prelude
>
> stringToInt::String->Int
> stringToInt str = read str
>
> main =
> do x<-getLine
> y<-stringToInt x
> print y
It is a type problem. Using the '<-' syntax for 'stringToInt' requires
that it is a monadic function (like: String -> IO Int), but it is not.
Since it is not monadic, you can simply let-bind the result to a name:
do xStr <- getLine
let x = stringToInt xStr
print x
Or more simply:
do xStr <- getLine
print (stringToInt xStr)
Greets,
Ertugrul
--
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