strlen in Hutton 2ed 10.5 Derived primitives
White Spaced
run on Windows 7 Haskell Platform 8.2.2
strlen :: IO ()
GHCi, version 8.2.2: http://www.haskell.org/ghc/ :? for help
strlen = do putStr "Enter a string: " [1 of 1]
Compiling Main ( C:\strlen.WhiteSpaced.hs, interpreted )
xs <- getLine
putStr "The string has "
C:\strlen.WhiteSpaced.hs:2:14: error:
putStr (show (length xs)) Parse
error in pattern: putStr
putStr " characters"
Possibly caused by a missing 'do'?
|
2 | strlen = do putStr "Enter a string: "
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^...
Failed, no modules loaded.
Prelude>
Bracesed
strlen :: IO
GHCi, version 8.2.2: http://www.haskell.org/ghc/ :? for help
strlen = do {putStr "Enter a string: "; [1 of 1]
Compiling Main ( C:\strlen.Bracesed.hs, interpreted )
xs <- getLine; Ok, one
module loaded.
putStr "The string has "; *Main>
putStr (show (length xs));
putStr " characters"}
--
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