Problem Solving with C++ (9th Edition)
9th Edition
ISBN: 9780133591743
Author: Walter Savitch
Publisher: PEARSON
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Chapter 18, Problem 8PP
You have collected a file of movie ratings where each movie is rated from 1 (bad) to 5 (excellent). The first line of the file is a number that identifies how many ratings are in the file. Each rating then consists of two lines: the name of the movie followed by the numeric rating from 1 to 5. Here is a sample rating file with four unique movies and seven ratings:
| 7 Harry Potter and the Order of the Phoenix 4 Harry Potter and the Order of the Phoenix 5 The Bourne Ultimatum 3 Harry Potter and the Order of the Phoenix 4 The Bourne Ultimatum 4 Wall-E 4 Glitter 1 |
Write a
| Glitter: 1 review, average of 1 / 5 Harry Potter and the Order of the Phoenix: 3 reviews, average of 4.3 / 5 The Bourne Ultimatum: 2 reviews, average of 3.5 / 5 Wall–E: 1 review, average of 4 / 5 |
Use a map or multiple maps to calculate the output. Your map(s) should index from a string representing each movie’s name to integers that store the number of reviews for the movie and the sum of the ratings for the movie.
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Suppose that the two Rank methods below are added to the Skip List class on Blackboard.
public int Rank(T item)
Returns the rank of the given item.
public T Rank(int i)
Returns the item with the given rank i.
Requirements
1. Describe in a separate Design Document what additional data is needed and how that data is used to
support an expected time complexity of O(log n) for each of the Rank methods. Show as well that the
methods Insert and Remove can efficiently maintain this data as items are inserted and removed. (7
marks)
2. Re-implement the methods Insert and Remove of the Skip List class to maintain the augmented data in
expected O(log n) time. Using the Contains method, ensure that added items are distinct. (6 marks)
3. Implement the two Rank methods. (8 marks)
4. Test your new methods thoroughly. Include your test cases and results in a Test Document. (4 marks)
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Chapter 18 Solutions
Problem Solving with C++ (9th Edition)
Ch. 18.1 - If v is a vector, what does v.begin() return? What...Ch. 18.1 - If p is an iterator for a vector object v, what is...Ch. 18.1 - Suppose v is a vector of ints. Write a for loop...Ch. 18.1 - Suppose the vector v contains the letters 'A',...Ch. 18.1 - Suppose the vector v contains the letters 'A',...Ch. 18.1 - Suppose you want to run the following code, where...Ch. 18.2 - Prob. 7STECh. 18.2 - Prob. 8STECh. 18.2 - Prob. 9STECh. 18.2 - Prob. 10STE
Ch. 18.2 - Prob. 11STECh. 18.2 - Prob. 12STECh. 18.2 - Prob. 13STECh. 18.2 - Prob. 14STECh. 18.2 - Prob. 15STECh. 18.2 - Prob. 16STECh. 18.3 - Prob. 17STECh. 18.3 - Prob. 18STECh. 18.3 - Prob. 19STECh. 18.3 - Suppose v is an object of the class vectorint. Use...Ch. 18.3 - Prob. 21STECh. 18.3 - Can you use the copy template function with vector...Ch. 18.3 - Prob. 23STECh. 18 - Prob. 1PCh. 18 - Prob. 2PCh. 18 - Prob. 3PCh. 18 - Prob. 4PCh. 18 - Write a program that allows the user to enter any...Ch. 18 - Prob. 3PPCh. 18 - Prob. 5PPCh. 18 - Solution to Programming Project 18.6 In this...Ch. 18 - Prob. 7PPCh. 18 - You have collected a file of movie ratings where...Ch. 18 - Prob. 9PP
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