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CDL appends
a b c
count = 3
Test CDL_PREPEND_ELEM d with elt NULL
a b c d
Test CDL_PREPEND_ELEM e before item b
a e b c d
Test CDL_APPEND_ELEM f with elt NULL
f a e b c d
Test CDL_APPEND_ELEM g after item b
f a e b g c d
count = 7
advancing head pointer
a e b g c d f
a e b g c d f a e b g c d f a e b g c d
a f d c g b e a f d
deleting (b)
a e g c d f
deleting (a)
e g c d f
deleting (c)
e g d f
deleting (g)
e d f
deleting (e)
d f
deleting (d)
f deleting (f)
DL appends
a b c
count = 3
Test DL_PREPEND_ELEM d with elt NULL
a b c d
Test DL_PREPEND_ELEM e before item b
a e b c d
Test DL_APPEND_ELEM f with elt NULL
f a e b c d
Test DL_APPEND_ELEM g after item b
f a e b g c d
count = 7
deleting (b)
f a e g c d
deleting (a)
f e g c d
deleting (c)
f e g d
deleting (g)
f e d
deleting (e)
f d
deleting (d)
f deleting (f)
LL appends
a b c
count = 3
Test LL_PREPEND_ELEM d with elt NULL
a b c d
Test LL_PREPEND_ELEM e before item b
a e b c d
Test LL_APPEND_ELEM f with elt NULL
f a e b c d
Test LL_APPEND_ELEM g after item b
f a e b g c d
count = 7
deleting (b)
f a e g c d
deleting (a)
f e g c d
deleting (c)
f e g d
deleting (g)
f e d
deleting (e)
f d
deleting (d)
f deleting (f)
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