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[ghc-hetmet.git]
/
ghc
/
misc
/
examples
/
io
/
io016
/
Main.hs
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import IO -- 1.3
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import System (getArgs)
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import Char (toUpper)
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main = getArgs >>= \ [f1,f2] ->
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openFile f1 ReadMode >>= \ h1 ->
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openFile f2 WriteMode >>= \ h2 ->
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copyFile h1 h2 >>
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hClose h1 >>
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hClose h2
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copyFile h1 h2 =
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hIsEOF h1 >>= \ eof ->
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if eof then
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return ()
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else
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hGetChar h1 >>= \ c ->
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hPutChar h2 (toUpper c) >>
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copyFile h1 h2
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