Question about Functional Programming Fundamentals Chapter 9 of 13

Hi,

I was following along with Dr. Meijer's Functional Programming Fundamentals Chapter 9 but came across a compile error in Hugs that I didn't understand, especially since I thought that I entered the program exactly as Dr. Meijer did (which can be seen at time 9:53 in the video).

The program that is causing the error is as follows:

getchar :: IO Char

return :: a -> IO a

a :: IO (Char, Char)
a = do  x <- getChar
        getChar
        y <- getChar
        return (x,y)

The error that is returned is:

"Last generator in do {...} must be an expression"

Can someone tell me if I am missing something?

Are you missing the semicolons. 

getchar :: IO Char

return :: a -> IO a

a :: IO (Char, Char)
a = do  x <- getChar
      ;  getChar
      ;  y <- getChar
      ;  return (x,y)

Hi AdamSpeight2008. I did try it with the semicolons too, but then I get a different error. It says:

"Missing binding for variable "getchar" in type signature"

Are the bindings Case Sensitive?

even correcting for the getchar vs getChar, I get the exact same error:

"Missing binding for variable "getChar" in type signature"

but I don't understand why.