filter directory and do not report the file which error is 0

hi all,
i have two questions:
1. how can i filter some directories under source code trees?
   there many directories need be audited but some diretories need not
audited, how could i filter them?
2. the output report audit result of every file including the file whch
number of error is zero, how could it not show the file of zero error?

thank you!
hongyun
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