When an author produces an index for his or her book, the first step in this process is to decide which words should go into the index; the second is to produce a list of the pages where each word...

When an author produces an index for his or her book, the first step in this process is to decide which words should go into the index; the second is to produce a list of the pages where each word occurs. Instead of trying to choose words out of our heads, we decided to let the computer produce a list of all the unique words used in the manuscript and their frequency of occurrence. We could then go over the list and choose which words to put into the index.

The main object in this problem is a "word" with associated frequency. The tentative definition of "word" here is a string of alphanumeric characters between markers where markers are white space and all punctuation marks; anything non-alphanumeric stops the reading. If we skip all un-allowed characters before getting the string, we should have exactly what we want. Ignoring words of fewer than three letters will remove from consideration such as "a", "is", "to", "do", and "by" that do not belong in an index.

In this project, you are asked to write a program to read any text file and then list all the "words" in alphabetic order with their frequency together appeared in the article. The "word" is defined above and has at least three letters.

1. Your result should be printed to an output file named YourUserID.txt.


2. You need to create a Binary Search Tree (BST) to store all the word object by writing an insertion or increment function. Finally, a proper traversal print function of the BST should be able to output the required results.


3. The BST class in the text can not be used directly to solve this problem. It is also NOT a good idea to modify the BST class to solve this problem. Instead, the following codes are recommended to start your program.

//Data stored in the node type struct WordCount {    string word;    int count; };  //Node type: struct TreeNode {    WordCount info;    TreeNode * left;    TreeNode * right; };  // Two function's prototype // Increments the frequency count if the string is in the tree // or inserts the string if it is not there. void Insert(TreeNode*&, string);  // Prints the words in the tree and their frequency counts. void PrintTree(TreeNode* , ofstream&);  //Start your main function and the definitions of above two functions.

Sample Run

Download the following files:

Lincoln.txt

download

index.txt

download

You only need to write these two functions. Do not add anymore functions besides the ones given here.

Paste your source and output files (upload- do NOT zip them!)-your source file:(1)
proj10.cppwith your sample run pasted as comments at the end
and (2)
your output file -userID.txt
for the assignment in one document file and upload it here. No screenshots. I need to be able to copy and paste your code to run it.NOTE THAT YOU CAN SUBMIT THE ASSIGNMENT ONLY ONCE WHEN USING Turnitin.Please make sure to compare your output file with the index.txt provided for correctness.