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unformatted IO binary to ASCII to binary

Hi guys,
i have a question here. If i have to convert a ppm image file to pgm image file. Both are in P5 and P6 format which will be binary file.
So far i can open a binary stream read and write in the exact same format.
But i need to access the value within and modify and write them out in the correct format.
Can anyone please advise me on any possible solution that i can explore.

http://netpbm.sourceforge.net/doc/ppm.html for PPM
http://netpbm.sourceforge.net/doc/pgm.html for PGM
May 25 '07 #1
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