bmiTell :: => Double -> String
bmiTell bmi
| bmi <= 18.5 = "You're underweight, you emo, you!"
| bmi <= 25.0 = "You're supposeldly normal. Pffft, I bet you're ugly!"
| bmi <= 30.0 = "You're fat! Lose some weight, fatty!"
| otherwise = "You are a whale, congratulations!"
このコードでエラーが発生しました。「入力の解析エラー'=>'」理由がわかりません。何か助けはありますか?ありがとう !