Thomas Engel <[EMAIL PROTECTED]> writes: > My problem is: How can I get the input values into the calculations and back > the result to the output.
> In an other language I would use global variables for this. That would be bad style. > An other point is that I want to separate the input from the calculations and > the output. > So what should I use in haskell? I think your pseudocode is right on track. > inputvalues :: IO () The most obvious way to do it would be to define data Input = ... data Output = ... input_values :: IO Input calculate :: Input -> Output ouput_values :: Output -> IO () then: main = do i <- input_values let o = calculate i output_values o or: main = output_values . calculate =<< input_values -k -- If I haven't seen further, it is by standing in the footprints of giants _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe