L.S.,
The attached program reads a filename ("x.x") from file "filenames.dat";
then the program tries to read file "x.x";
this file does not exist, in the first call to "main", an internal error
message is displayed; the second time, a "file does not exist" message
is displayed.
The following shows what happens:__ __ __ __ ____ ___ _______________________________________________
|| || || || || || ||__ Hugs 98: Based on the Haskell 98 standard
||___|| ||__|| ||__|| __|| Copyright (c) 1994-2003
||---|| ___|| World Wide Web: http://haskell.org/hugs
|| || Report bugs to: [EMAIL PROTECTED]
|| || Version: Nov 2003 _______________________________________________
Haskell 98 mode: Restart with command line option -98 to enable extensions
Type :? for help
Prelude>
Prelude> :l "C:\\Mijn documenten\\SoftwareOntwikkeling\\Haskell\\ReadALot\\Error
InGraph.lhs"
Main> main
Program error:
Program error: pattern match failure
(181 reductions, 528 cells, 1 garbage collection)
INTERNAL ERROR: Error in graph
Main>
Main> main
Program error: x.x: IO.openFile: does not exist (file does not exist)
(197 reductions, 499 cells) Main>
-- Met vriendelijke groet, Herzliche GrÃÃe, Best regards, Henk-Jan van Tuyl
ErrorInGraph.lhs
Description: haskell
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