Haskell入門その1

test001.hs

module BMI where
type BMI = Double
stdBMI :: BMI
stdBMI = 22.0
type Height = Double
type Weight = Double
bmi :: (Height, Weight) -> BMI
bmi (h,w) = w / (h ^ 2)


コマンドプロンプト

I:\haskell>ghci test002.hs
GHCi, version 6.12.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
[1 of 1] Compiling BMI ( test002.hs, interpreted )
Ok, modules loaded: BMI.
*BMI> bmi(1.71,79.5)
27.18785267261722


う～む、まだ楽しくない