Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
7th Edition
ISBN: 9780134802213
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 17PC
Lottery Statistics
To play the PowerBall lottery, you buy a ticket that has five numbers in the range of 1-69, and a “PowerBall” number in the range of 1–35. (You can pick the numbers yourself, or you can let the ticket machine randomly pick them for you.) Then, on a specified date, a winning set of numbers are randomly selected by a machine. If your first five numbers match the first five winning numbers in any order, and your PowerBall number matches the winning PowerBall number, then you win the jackpot, which is a very large amount of money. If your numbers match only some of the winning numbers, you win a lesser amount, depending on how many of the winning numbers you have matched.
In the student sample programs for this book, you will find a file named pbnumbers.txt, containing the winning PowerBall numbers that were selected between February 3, 2010 and May 11, 2016 (the file contains 654 sets of winning numbers). Here is an example of the first few lines of the file’s contents:
17 22 36 37 52 24
14 22 52 54 59 04
05 08 29 37 38 34
10 14 30 40 51 01
07 08 19 26 36 15
and so on …
Each line in the file contains the set of six numbers that were selected on a given date. The numbers are separated by a space, and the last number in each line is the PowerBall number for that day. For example, the first line in the file shows the numbers for February 3, 2010, which are 17, 22, 36, 37, 52, and the PowerBall number 24.
Write one or more programs that work with this file to perform the following:
- Display the 10 most common numbers, ordered by frequency
- Display the 10 least common numbers, ordered by frequency
- Display the 10 most overdue numbers (numbers that haven’t been drawn in a long time), ordered from most overdue to least overdue
- Display the frequency of each number 1–69, and the frequency of each Powerball number 1–26
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9. Trivia Game
In this programming exercise, you will create a simple trivia game for two players. The program will work like this:
Starting with player 1, each player gets a turn at answering 5 trivia questions. (There should be a total of 10 questions.) When a question is displayed, 4 possible answers are also displayed. Only one of the answers is correct, and if the player selects the correct answer, he or she earns a point.
After answers have been selected for all the questions, the program displays the number of points earned by each player and declares the player with the highest number of points the winner.
To create this program, write a Question class to hold the data for a trivia question. The Question class should have attributes for the following data:
A trivia question
Possible answer 1
Possible answer 2
Possible answer 3
Possible answer 4
The number of the correct answer (1, 2, 3, or 4)
The Question class also should have an appropriate _…
START OF PLAY
The player starts with 100 points. They have ten attempts (or rounds) to reach 500 points to win. Each round, the player "bets" some amount of points. See gameplay as follows:
A HIGH/LOW ROUND
(1) The player is shown an initial random card.Cards have a value from 2-14; however, these values are converted to a string as follows: 2-9 are converted to their string equivalent "2", "3", ... "9"10 is "T", 11 is "J", 12 is "Q", 13 is "K" and 14 is "A"
(2) After the play sees the first card, they should guess if the next card will be higher (i.e., greater than the current card) or lower (i.e., a lower value than the first card).They will do this by inputting "H" or "L" (lowercase "h" and "l" will also be accepted as valid input).
(3) After they input their "high" or "low" guess, the player bets a number of points that their guess will be right. The bet must be between 1 and the total amount of points the player has.1
(4) After the bet amount is entered, a second card will be…
Bulgarian solitaire def bulgarian_solitaire(piles, k):
You are given a row of piles of pebbles, all identical, and a positive integer k so that the total number of pebbles in these piles equals k*(k+1)//2, the arithmetic sum formula that equals the sum of positive integers from 1 to k. Almost as if intended as a metaphor for the bleak daily life behind the Iron Curtain, all pebbles are identical and you don't have any choice in your moves. Each move picks up one pebble from each pile (even if doing so makes that pile vanish), and creates a new pile from the resulting handful. For example, starting with[7, 4, 2, 1, 1], the first move turns this into [6, 3, 1, 5]. The next move turns that into [5, 2, 4, 4], which then turns into the five-pile configuration [4, 1, 3, 3, 4], and so on.
This function should count how many moves are needed to convert the given initial piles into the goal state where each number from 1 to k appears as the size of exactly one pile, and return that count. These…
Chapter 9 Solutions
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
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