how to write a program like top, whose output keep the line number constant

baumann.Pan_at_gmail.com
Date: 05/31/05

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    Date: 30 May 2005 23:12:04 -0700
    
    

    hi all,

    in linux the top program can keep some information topmost, which
    doesn't like printf do, if using printf, the screen will scroll. how to
    implement this feature?

    thanks,
    baumann@pan


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