# Homework 5 CSCI 235 solution

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100 points
Programming Problem: 100 points + 15 EC points
An important document is given to you and your job is to create an online index of it so
as to be able to find any word’s location in the text quickly. You have decided that the
best way to do this is to create a binary search tree, with each node containing the word
you are searching for along with a linked list (or queue) that contains the line number of
the transcript where the word occurs. This way, you can know at what line(s) in the text a
word occurs. You must make sure that your program filters the words on input to treat
upper and lower case as the same, remove punctuation marks, and not store numerical
data as words. Read the text in from a data file called document1.txt in the blackboard,
and build a binary search tree index.
(a) Create the index for the document.
(b) Print the index out in lexicographic order with a count of the number of times the
word occurred and a list of each line number that the word is found on. Use an inorder
traversal to print the tree out. Below is a partial sample output:
a Count: 46 Lines: 12,14,16,17,17,22,23,24,26,28,
32,35,36,37,38,39,42,47,52,53,57,
60,78,81,88,88,90,91,97,97,116,119,
132,136,151,153,153,165,174,175,176,177,181,
184,189,190,
able Count: 1 Lines: 32,
access Count: 1 Lines: 150,
according Count: 1 Lines: 77,
acknowledged Count: 1 Lines: 70,
act Count: 1 Lines: 29,
activity Count: 1 Lines: 133,
affirmative Count: 3 Lines: 71,84,96,
after Count: 1 Lines: 102,
afterward Count: 1 Lines: 102,
all Count: 3 Lines: 54,181,192,
allegations Count: 1 Lines: 85,
also Count: 5 Lines: 70,77,90,126,133,
Programming HW4
CSCI 235
Ilya Korsunsky
Due Friday 5/15/15
although Count: 1 Lines: 131,
among Count: 3 Lines: 114,151,151,
amount Count: 2 Lines: 81,117,
. . . . .
. . . . .
(c) Print the total number of tree nodes.
(d) Print out the height of the tree.
(e) Print out the word with the maximum number of occurrences and on what line(s) this
word occurs.
(f) Interactively request the user to input a word and return the number of occurrences of
that word and the line numbers they occur on. A message should be printed if the word is
not in the index.
For testing purpose, you can use the file document1_short.txt that is a shorter version of
the main file
EXTRA CREDIT (15 points)
(g) Implement the deletion of a given word. In order to test, ask the user to provide a
word, and delete it. Then search for the same word again and demonstrate that it is not in
the tree.
(h) Display the tree in a level-order traversal.
PROGRAMMING TIPS:
Start from the partial tree implementation that will be provided on blackboard. Note that
the BinaryNode is template given two types. So a given BinaryNode for the tree that
stores a string (this is the key) and a LinkedQueue of integers (you can also use a
LinkedList of integers) can be syntactically defined as follows: