putStr vs. putStrLn

[Andre W B Furtado]

Hello there. I used the code below to read and print the bitmap file attached (bitmap.bmp), which contains the character ASCII 26 (or 1A-hexa). This special character is used by MSDOS as an end of file marker.   import IO import IOExts   main :: IO () main = do  bmFile <- openFileEx "bitmap.bmp" (BinaryMode ReadMode)  charloop bmFile 0   charloop :: Handle -> Integer -> IO () charloop bmFile 70 = hClose bmFile charloop bmFile n = do    hSeek bmFile AbsoluteSeek n    a <- hGetChar bmFile    putStrLn [a]    charloop bmFile (n+1)   This program did not stuck after reading the special character, but if you change putStrLn by putStr you will notice that a strange thing happens: after reading the special character, the program won't show any more characters. Why does it happen?   Thanks, Andre Furtado

bitmap.bmp