--PRACTICE QUESTIONS--
TA: Haluk Madencioglu


1-)
i)
Define a predicate setdiff/3 such that ; given two sets A,B, and a third C,
setdiff(A,B,C) will be true if C is the set difference of A and B

For example: setdiff([a,b,c,d,e],[b,c],L) gives L=[a,d,e]

Hint: use member  predicate.
You must get the exact set difference and for once. 
Consider using a cut.

ii)
When does the query fail for any set?
Does it produce any multiple solutions for any query? which one?

2-)

Define a predicate flatlist/2 which generates a flat list from a nested one.

Sample use: given [a, [b,c], [d, e, [f, [g], h] ] ],
flatlist([a, [b,c], [d, e, [f, [g], h] ] ],L) gives L=[a,b,c,d,e,f,g,h]

You can use append.


3-)Do flatlist using difference lists.