Author: Stan Eisenstat
Subject: Re: [Cs223] testDeque on nonexistent Deque 2
Date: Saturday, 04 Apr 2020, 22:25:19

    > Message Posted By: Unknown
    ...
    > I saw the posting yesterday (4/3):
    >
    > > If I run ./testDeque with my ADT and enter the command "IA" before
    > > anything (checking if deque A is empty when deque A doesn't exist), I get
    > > a seg fault. Is this something to worry about?
    >
    > and realized I too am having the same error. However, I do not know how to
    > correct such a problem. I can only think of checking whether or not the
    > passed in argument is NULL or checking the head and tail fields, but I
    > cannot think of any method of validating whether or not the argument
    > exists (i.e. a has never been initialized).
    >
    > Could you shed some light on how we could possibly detect this type of
    > invalid argument where the deque is nonexistent at the time of calling it
    > in a function?

Implement what you describe above.

--Stan-