Haskell在运行GHCI时无法找到模块'Random',我该怎么办

Question

这是猜数码.当我运行它时,我收到一个错误:找不到模块'Random'.我该怎么办 ？

module Main where 

import IO
import Random

main = do 
       hSetBuffering stdin LineBuffering
       num <- randomRIO (1::Int, 100)
       putStrLn "I'm thinking of a number between 1 and 100"
       doGuessing num = do
           putStrLn "Enter your guess:"
           guess <- getLine
           let guessNum = read guess
           if guessNum < num
              then do putStrLn "Too Low!"
                   doGuessing num
           else if guessNum > num
              then do putStrLn "Too High"
                   doGuessing num
           else do putStrLn "You Win!"

Answer 1

你应该使用

import System.IO
import System.Random

代替.