The error is as follows:
Even looked at the stddef.h file but unable to figure out anything.
The code is as follows:
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Deleted the pset3.zip and pset3 from the appliance. Again downloaded the zip file by executing 'wget http://cdn.cs50.net/2014/fall/psets/3/pset3/pset3.zip' in the terminal window. Tried 'make find' and no error this time.