Tell me more ×  I'm working on the 2nd Euler's problem, but for
now I'm just trying to define the Fibonacci sequence. Currently,
I have my Fib function defined as  Fib 0 = 0 Fib 1 = 1 Fib x =
Fib (x - 1) + Fib (x - 2)  Because I want the program to depend
on my keyboard input, I used  main = do         putStrLn "Enter
desired Fibonacci index: "         "index" <- getLine
putStrLn Fib x  And defined x as x = read "index"  I'm pretty
sure I'm messing up both the indentation, and my syntax.
Depending on how I modify the code, running "ghc /dir/file.hs
gets me stuff like "Not in scope: data constructor `Fib'", or
"parse error (possibly incorrect indentation)". I really, really
don't know what the heck I'm doing, especially with regard to
how to set up the .hs to be compiler friendly. I've read through
about 7 tutorials on compiling with GHC, but they all seem to
skip the part where they explain the basic requirements of
compiling.  Please let me know how I can be more specific if
that would help. I think