8. Input & Output123456789import Data.Charmain = do putStrLn "What's your first name?" firstName <- getLine putStrLn "What's your last name?" lastName <- getLine let bigFirstName = map ...

7.Data Type & Type Parameters数值类型定义：1data Bool = False | True 数值构造器（value Constructor）：1data Shape = Circle Float Float Float | Rectangle Float Float Float Float 上面Circle 和 Rectangle 就是俩，他接受若干类型和个 ...