returning strings until no strings are left ?

["J." <mailing-lists@xs4all.nl>]

Hello,

I am new to c programming but not new to programming in general . The
``minor'' problem I keep running into at this moment:

I know how to return ONE string from a function. But what if I want to
keep returning strings from a function until there are no strings left to
return ? What should the function than return ? Because the function
should always return something in the end and of course the caller has to
know that the function is done or has nothing more to return .

for example fgets returns NULL when it's done, but if I try to return a
NULL at the end of my function while I claimed it as an char *... hmmzzz,
status epilepticus...

Thank you in advance...

J.