Linked List (Single/Double)

=================== LINKED LIST DEMO ===================
[ ] [D]-[0xbfb6b5cc]-[11]-[Albert]
[ ] [D]-[0xbfb6b5f0]-[12]-[Benson]
[ ] [D]-[0xbfb6b614]-[13]-[Cano  ]
[ ] [D]-[0xbfb6b638]-[14]-[David ]
[ ] [D]-[0xbfb6b65c]-[15]-[Elvin ]
[ ] [D]-[0xbfb6b680]-[16]-[Fan   ]
[ ] [D]-[0xbfb6b6a4]-[17]-[Gary  ]
[ ] [D]-[0xbfb6b6c8]-[18]-[Helen ]
[ ] [D]-[0xbfb6b6ec]-[19]-[Ivan  ]
[ ] [D]-[0xbfb6b710]-[20]-[John  ]
[V] [D]-[0xbfb6b6a4]-[17]-[Gary  ]
[ ] [D]-[0xbfb6b734]-[21]-[Kevin ]
[ ] [D]-[0xbfb6b758]-[99]-[.Orz  ]
[ ] [D]-[0xbfb6b5cc]-[11]-[Albert]
[ ] [D]-[0xbfb6b5f0]-[12]-[Benson]
[ ] [D]-[0xbfb6b614]-[13]-[Cano  ]
[ ] [D]-[0xbfb6b638]-[14]-[David ]
[ ] [D]-[0xbfb6b65c]-[15]-[Elvin ]
[ ] [D]-[0xbfb6b680]-[16]-[Fan   ]
--------------------------------------------------------
[1] Insert [2] Delete [3]        [4]        [5]         
[6] Next   [7] Prev   [8] Head   [9] Tail   [0] Quit    
==> Your choice is : 6