小编Chr*_*nan的帖子

你好我只想问一下如何在Haskell中创建一个矩形区域.这是我的代码

main = do
putStrLn"Enter base"
base <- getLine
putStrLn"Enter height"
height <- getLine
putStrLn("The area is: " ++ (height * base) /2)

错误在声明中:

putStrLn("The area is : " ++(height *base) /2)