[Haskell-beginners] Show Floats

Nathan M. Holden nathanmholden at gmail.com
Fri Nov 6 00:31:05 EST 2009

I have been working on a small library that will typeset notes in LaTeX for 
me, since I tend to have haphazard typesetting while I write, but while I read 
I like to have standards.

Anyways, I defined a datatype

data Color = RGB {
  name :: [Char],
  r :: Float,
  g :: Float,
  b :: Float,
  matchText :: [[Char]],
  targetText :: [Char]}

I wanted to be able to have a piece of code that said

"\\definecolor{"++name++"}{rgb}{"++show r++","++show g++","++show 

but because I have numbers below 0.1, it outputs as 2.0e-2, which is 
useless. I wrote a function that would output useful numbers, but it's REALLY 
bad Haskell:

fToInt :: Float -> Int
fToInt f = if f >= 10 then fToInt (f-10.0)
  else if (f >= 9) then 9
    else if (f >= 8) then 8
      else if (f >= 7) then 7
	else if (f >= 6) then 6
	  else if (f >= 5) then 5
	    else if (f >= 4) then 4
	      else if (f >= 3) then 3
		else if (f >= 2) then 2
		  else if (f >= 1) then 1 else 0

It takes up 11 lines in a module that's only got 74! (128  if you count the 
module to translate the notes into a .tex file)

how would I write this better?

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