Held: Friday, 7 March 2003
Summary: Today we consider how to make Scheme read values and characters from files and write values to other files.
anythingyou can do on the computer.
(write value port)
(display value port)
(let* (; Prepare to read from a file (source (open-input-file "data")) ; Read one value (value (read source))) ; We're done, so clean up. (close-input-port source) ; Return the value read value)
readdo when there's nothing left in the file? It returns a special value (which DrScheme displays as
read-charencounters the end of the file, it returns the same special value as
Thursday, 15 January 2003 [Samuel A. Rebelsky]
I usually create these pages
on the fly, which means that I rarely
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