小编Raf*_*zyk的帖子

我知道这有效:

do name <- getLine; let nameTag = "Hello, my name is " ++ name in putStrLn nameTag 

加载到GHCI时,这段代码也是如此:

hey = do 
    name <- getLine
    let nameTag = "Hello, my name is " ++ name
    putStrLn nameTag

但这不起作用:

do name <- getLine; let nameTag = "Hello, my name is " ++ name; putStrLn nameTag 

给出以下错误消息:

<interactive>:142:82:
  parse error (possibly incorrect indentation or mismatched brackets)

为什么不起作用？我可以让它运作吗？如果是,那怎么样？