Assignment #2CSCI 201 Fall 2024Page 1 of 11Assignment #2
CSCI 201 Fall 2024 6% of course grade
Title Networked Crossword Puzzle
Topics Covered NetworkingMulti-ThreadingConcurrency Issues
Introduction
This assignment will require you to create two different programs – a server and a client. Youwill implement a networked crossword puzzle game where multiple users can play against eachother. There will be some concurrency issues since you will need to make sure only certainclients can play at different times. There will be many ways to design out the program, so Irecommend you spend some time designing it out on paper before you begin coding.
Crossword puzzle game
A crossword puzzle is a word game consisting of interlocking horizontal and vertical grids.Participants enter letters into these grids based on the provided clues. The game concludes whenall empty grids are correctly filled. Typically, the horizontal grids are referred to as ACROSS
entries, while the vertical grids are called DOWN entries. Each across or down entry, whichconsists of a series of grids, corresponds to a word or phrase. All entries are indexed, and thecorresponding clues are provided for the participants. Additionally, the intersection of an acrossentry and a down entry indicates a shared letter at that specific location, which usually serves as
an extra hint besides the entry-specific clues.Crossword puzzle game exampleAssignment #2CSCI 201 Fall 2024Page 2 of 11
Server Functionality
The server will be responsible for reading the puzzle data from a file and distributing it to theclients when they connect. To simplify execution of your program, only one game can beoccurring at a time. Each game will have between 1 and 3 players. The first client to connect tohe server will specify the number of players.The server will have (possibly) multiple puzzle data files in a directory called gamedata at the
top of your project directory. Make sure that you specify a relative path when reading the puzzledata files so the graders can drop their puzzle data files in thegamedata directory and run your
program without having to change any hard-coded variables. Your server program will need toopen the directory that contains all the puzzle data files and determine how many files are in that
directory. It will then randomly choose one of the files to use. Of course, if there is only one file
in the directory, that is the one that will be chosen. The names of the files are irrelevant since the
server will choose one of them randomly, so they could be named anything at all.
Each game data file will contain all the information needed to play a game. The file will be
formatted as a Comma Separated Value (CSV) file with ACROSS on the first line, followed by one
or more lines formatted as:
ACROSS,,
<number>,<answer>,<question>
The file will then have a line with the word DOWN, then one or more lines formatted the same as
above. Here is a sample file:
ACROSS,,
1,trojans,What is USC’s mascot?
2,dodgers,What professional baseball team is closest to USC?
3,csci,What is the four-letter prefix for Computer Science?
DOWN,,
1,traveler,What is the name of USC’s white horse?
4,gold,What is one of USC’s colors?
5,marshall,Who is USC’s School of Business named after?
Your server program will need to determine if the file is formatted properly. The only rules thatyou need to check are the following:
- The words ACROSS and DOWN exist on their own lines and only one time in the file andare followed by empty CSV fields.
- The other lines in the file are formatted with three parameters – integer, answer, question.
- The three parameters are separated by commas as it is normal for CSV files.Assignment #2CSCI 201 Fall 2024Page 3 of 11If a number in the ACROSS section matches a number in the DOWN section, theanswers must start with the same letter. In the example above, the lines with
trojans and traveler both start with same letter “t”, since their number isthe same, “1”.
- An answer cannot contain any whitespace.
- Questions normally will contain whitespace.
The server will need to determine how to format the answers in the game board so it can send out
that information to all the clients (since the clients all need to render the game board the same).
There will be different ways that the data can be rendered. You can assume that there is at least
one viable way to render the game board. In other words, you can assume that each word
contains at least one letter that is in another word and the board can be rendered for the player.
This may be challenging to figure out, so make sure to write out an algorithm to solve this before
you begin coding.
If the ACROSS number and the DOWN number are the same, that means the answers will start
with the same letter, as explained above. The numbers do not have to be in order in the file, but
ll the questions for a section will immediately follow the lines with ACROSS or DOWN.There will not be more than one ACROSS or DOWN section in a file.
All the answers to the questions are case-insensitive. The server will wait to randomlydetermine a game file to read until the first client has connected.The server will listen on port 3456. When a client connects to it, it will randomly determine a
game data file to read, verify that the file is formatted properly, and figure out a rendering of the
game board. If there are no valid game files, the server should report that to the client andcontinue waiting for another client to connect. At that point, it will read the directory again and
randomly choose another game data file.
When the first client connects to it, the first message it sends will be a number between 1 and 3to determine how many players will be part of the game. If the number is 1, the server can startthe game. If the number is 2 or 3, the server will need to wait until the proper number of clients
have connected to the server before starting the game.
Game Play
Once the proper number of players have joined the game, the server will send out the game board
to all the players. The players will begin play in the order they joined the game. Only one playerhould be able to play at a time. More information on how the client will behave is included in
whether the answer provided for the appropriate question is correct. If it is, the same player whoguessed the correct answer will get to play again. If it is incorrect, play will proceed to the nextplayer. Regardless, the server should send a notification to all the clients letting them know what Assignment #2
CSCI 201 Fall 2024
Page 4 of 11
question the player was attempting to answer, what the player guessed, and whether it was
correct.
The server should keep track of how many correct answers each player has guessed, and which
questions are remaining. Once all the questions have been answered correctly, the server will
notify all the players of the final score (1 point for each question answered correctly) and who
the winner is (or a tie, if that is the case).
You do not need to maintain statistics, and there are no user accounts. Once a game concludes,
the clients should terminate. The server should loop and allow a new game to begin by having
another client connect. The server cannot allow another game to begin while a game is being
played – only one game is played at a time. The server should never have to be restarted,
though, to play subsequent games. Once the server has started, the only way to stop playing
games is to “kill” the server, which is done by clicking “Terminate”, the red square, in Eclipse.
Client Functionality
The client will begin by welcoming the user to the game and prompting them for the server
hostname and port. If a valid connection is not made, an error message should be displayed, and
the client should loop back to allow the user to enter another server hostname and port. If a valid
connection is made, the first client should prompt for the number of players. The valid number
of players is between 1 and 3. The first client should continue prompting for the number of
players until a valid number is entered.If the necessary number of players have not yet joined the game, all the clients, except for the
last one to join, should display a message that says “Waiting for player x.” The “x”should be replaced by the player number for which we are waiting. When a player joins, all
clients, except for the last one, should display a message stating from which IP address the player
joined.
Once all the required players have joined, all clients should display a message that says, “The
game is beginning.” The server will send the game board, which includes the crosswordpuzzle and the questions.Play will proceed through the players based on the order they joined the game. Player 1 will go
first and select to guess the answer to a question that is either “down” or “across”, as in “Wouldyou like to answer a question across (a) or down (d)?”. If “d” or “a” is not
entered, the client should prompt the user again. 代写CSCI 201 Networked Crossword Puzzle The user will then be prompted to enter number for which question to answer, as in “Which number?”. If the value entered is notvalid, the client should prompt the user again.
Once the user has entered a valid question, (let’s assume “a” and “1” were entered), the clientshould prompt the user to enter the answer to the question, “What is your guess for 1 Assignment #2CSCI 201 Fall 2024Page 5 of 11
across?” The answer should be sent to the server, which will return whether it was correct or
incorrect to all the connected clients. The (possibly) updated game board and remaining
questions to answer will be sent to all clients. Do not display questions that have already been
answered correctly.
If a player answers a question correctly, they will get to answer another question. If the answer
was incorrect, play will move to the next client who joined. If the last player that joined answers
question incorrectly, play will proceed with the first player.Play continues until all the correct answers have been guessed. The completed game board with
all the questions will be displayed, and the final scores will be shown. The final score is only
ased on how many questions a user guessed correctly. If one player has more correct answers
than any the others, that player is declared the winner. If two players have the same score, the
game is declared as a tie.All the clients will then terminate, but the server will loop back to allow new players to join and
start a new game.The sample execution that follows shows all the messages that should be displayed throughoutthe game. Your output should be as close as possible to the one shown below, though thecrossword puzzle may look different for the same answers since that will be based on how yourprogram generates it.Assignment #2
Final Score
Player 1 – 4 correct answers.
Player 2 – 2 correct answers.
Player 1 is the winner.
<Client terminates>Assignment #2
CSCI 201 Fall 2024
Page 11 of 11
Grading Criteria
The way you go about implementing the solution is not specifically graded, but the output must
match exactly what you see in the execution above. The maximum number of points earned is
Networking (0.5)
0.1 - first client can connect to server
0.2 - only the number of clients as specified by first client can connect to server
0.2 - server allows a new game to be played after previous one ends without restarting
File Reading (0.5)
0.1 - random file chosen from gamedata directory
0.1 - gamedata directory is at the top of the project folder
0.1 - server chooses game data file after first client connects
0.2 - client is notified if no valid game data file exists
Game Board Rendering (1.5)
1.5 - game board is rendered in a correct manner where there are no disjoint words (i.e., they are all
connected to each other)
Game Play (1.5)
0.1 - only one player can answer a question at a time
0.1 - once a question has been answered correctly, that question is no longer displayed
0.1 - answers are case-insensitive
0.1 - proper error checking is in place for “a” and “d”
0.1 - proper error checking is in place for the question number to answer
0.2 - all clients are notified of answers that are guessed by other players
0.1 - updated game board is displayed properly
0.3 - final score is displayed after all answers have been guessed correctly
0.1 - client terminates after the final score is displayed
0.3 - the game is played as expected with no exceptions, crashing, deadlock, starvation, or freezing
Output (0.4) 0.4 - the output is the same as what is provided in the sample above
Synchronization (0.6) 0.3 - synchronization through monitors, locks, or semaphores is used somewhere in the server0.3 - synchronization through monitors, locks, or semaphores is used somewhere in the clien
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