C++ Implementation of AVL Trees
1 Task Description
You are asked to use C++ to implement
• Binary Tree Traversal
• AVL Tree Insertion and Deletion
2 Submission Guideline
You must follow this guideline! Your submission will be marked automatically. Failure to
follow this guideline will result in 0.
Your submission should contain exactly 1 file: main.cpp.
You do not need to submit a design.
You should start your program by initializing an empty AVL tree. Your program takes one line as
input. The input line contains n “modification moves” separated by spaces (1 ≤ n ≤ 100). The available
modification moves are
• Aint (Character A followed by an int value between 1 and 100): A3 means insert value 3 into the AVL
tree. If 3 is already in the tree, do nothing.
• Dint (Character D followed by an int value between 1 and 100): D3 means delete value 3 into the AVL
tree. If 3 is not in the tree, do nothing.
Your input is then followed by exactly one finishing move (PRE or POST or IN): If the finishing move is
PRE, then you should print out the tree (in its current situation) in pre-order. If the tree is empty, print out
EMPTY. Otherwise, print out the values separated by spaces. POST and IN are handled similarly.
You don’t need to worry about invalid inputs.
Sample input 1: A1 A2 A3 IN
Sample output 1: 1 2 3
Sample input 2: A1 A2 A3 PRE
Sample output 2: 2 1 3
Sample input 3: A1 D1 POST
Sample output 3: EMPTY
3 Websubmission
You are asked to submit via the web interface https://cs.adelaide.edu.au/services/websubmission/.
The submission steps should be self-explanatory. Simply choose the correct semester, course, and assignment.
The websubmission system will automatically fetch the latest version of your work from your SVN repository
(you may also choose to submit older versions). Once your work is submitted, the system will launch a
script checking the format of your submission. Click “View Feedback” to view the results. Your mark will
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be calculated offline after the deadline. You are welcome to resubmit for as many times as you wish (before
the deadline).
We will compile your code using g++ -o main.out -std=c++11 -O2 -Wall main.cpp. It is your responsibility to ensure that your code compiles on the university system.
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1g++ has too many versions, so being able to compile on your laptop does not guarantee that it compiles on the university
system. You are encouraged to debug your code on a lab computer (or use SSH).