How to tell if a file is closed

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Hi,
    There is a simple technique. Suppose you open a file called
hello.dat. Define your own file closing function, say, Closer(FILE*).
The Closer() function should close the file hello.dat and if it is
properly closed, create a new file called hello.dat.closed.
    Your main program need only test for the existance of
hello.dat.closed.

Apologies for puuting this on the root page where this note doesn't really
belong,

Chris

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=                                                               =
= Chris Jillings                                                =
= Department of Physics   phone/voice mail: (613) 545-6000x4805 =   
= Queen's University      fax: (613) 545-6813                   =
= Kingston, Ontario       email: chris@sno.phy.queensu.ca       =             
= Canada, K7L 3N6         web: http://sno.phy.queensu.ca        =
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