regexp(3) - a request for a clear explanation

[Dr. Megabyte]

I've poured myself over ny manual and looked at regcmp(1), regcmp(3), and
regexp(3), and I'm still not sure how to use these functions.  Could someone
send me some clear info on how to use these functions along with some examples?

For the record: I am running Zeus 3.21 which is SYS III port to those of you 
who are fortunate to have never heard of it.
-- 
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UUCP:	(1) seismo!why_not!scsnet!sunder		Mark E. Sunderlin
	(2) ihnp4!chinet!megabyte			aka Dr. Megabyte
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