CodeGuru Home VC++ / MFC / C++ .NET / C# Visual Basic VB Forums Developer.com

1. Junior Member
Join Date
Mar 2011
Posts
1

Hi everyone. I'm taking a Java class this semester and though at the beginning, I could easily get through problems, now it's getting difficult with the more and more options my prof. is adding on. Every week we get a "project" in which we must construct a program based on the following guidelines. Here is this weeks in which we have to create a Board Game:

For this assignment, your job is to create a kind of lobotomized version of a board game (such as Monopoly) called Opoly.

Opoly works this way: The board is a straight linear track of variable length (you determine the length when you start up the game). There is only one playing piece, which begins the game just off the board, at position 0. Thus, if the board length is 20, then the board positions start at position 1 and end at position 20. To finish the game, the piece must land exactly on the last cell of the board (e.g., cell 20 in the example above).

The object of the game is to acquire reward. The reward amount is initialized to 10. If your board piece lands on a board cell that is divisible evenly by 4, your reward doubles. However, if your piece lands one cell shy of the final board cell, your reward is reduced to 1/4 of its current value (via integer division), and your piece must go back to the start position - position 0.

In Opoly the game piece advances via a spinner - a device that takes on the values 1-2-3-4-5 at random, with each advance value equally likely.

1) if a spin would move the piece beyond the end of the board, the piece should not advance at all (thus, if the piece is at location 18 of a 20 cell board, and if the spinner spins a 5, this is counted as a move but the piece remains at location 18.)

2) if the next to last board location is divisible by 4, and if the piece lands on this location, the reward is reduced to 1/4 of its current value only - the reward is NOT also doubled. Example: the board size is 25, and the piece is at location 22, with reward 30. Suppose the spinner spins a 2. This puts the piece on the next to the last location on the board. This resets the reward to 7 = 30 * 1/4, and places the piece at location 0. Even though location 24 is divisible by 4, no doubling happens.

Here is the driver class for the game:
import java.util.*;

public class OpolyDriver{

public static void main(String[] args){
System.out.println("Enter an int - the size of the board");
Scanner s = new Scanner(System.in);
int boardSize = s.nextInt();
System.out.println("Board Size: " + boardSize);
Opoly g = new Opoly(boardSize);
g.playGame();
}
}

Here is a sample run:

> java OpolyDriver
Enter an int - the size of the board
Board Size: 20
*O****************** 10 // top line says: current position is 2, current reward is 10
***O**************** 20
*******O************ 40
************O******* 40
***************O**** 80
****************O*** 80
*******************O 160
game over
rounds of play 7
final reward 160

A requirement: your Opoly class must include the following methods, in addition to the Opoly constructor and principal method playGame(). These are:
* spin - generates a integer value from 1 to 5 at random
* move - advances the piece
* spinAndMove - spins the spinner and then advances the piece according to the rules of the game (uses spin, move methods)
* isGameOver - checks if game termination condition has been met
* drawBoard - draws the board using *'s and an O to mark the current board position. Feel free to improve on the display we've shown above.
* displayReport - reports the end of the game, and gives the number of rounds of play, and the final reward

How to proceed:

* First, decide on the attributes for the Opoly class. At any instant, what is the "state" of the board? What do you need to keep track of to give the final report? The answers to these questions will tell you what the attributes to Opoly can be.

* Second, write the Opoly constructor.

* Third, try to write the playGame method using the methods outlined above. A good way to proceed is to write a "dummy" drawBoard method first - instead of having it draw anything, merely have it print out the current position. Once you're satisfied with the general running of the game in this format, then work on the drawing part.

Paste in your Opoly class in the box below:

NOTE: you may NOT use any import statements in your class. Use the Math class methods to generate your random numbers. Do NOT import the java.util library.

I'm not really sure where to begin. I tried putting the driver into DrJava but it just keeps telling me that "Opoly" can't be found. Any direction of where to go would be greatly helpful, I think I'm just overwhelmed from all the information. I also don't know how to go about getting the scanner class to work without importing it.

2. Elite Member Power Poster
Join Date
Aug 1999
Location
UK
Posts
10,163

You don't need to import the Scanner class, it's part of the java.util package that is automatically imported.

I don't know DrJava, so I can't help with that. However, if you're not using packages in your code, you'll need to put all the source files into the same folder (directory).

If you want help with error messages, post the full error message text and stack trace, if present.

If you want help with something else, ask a specific question.

If you understand what you're doing, you're not learning anything...
Anon.

3. Elite Member Power Poster
Join Date
May 2006
Location
UK
Posts
4,473

I also don't know how to go about getting the scanner class to work without importing it.
You don't need to use a Scanner in the Opoly class you are writing. The OpolyDriver class provided by your tutor handles the user input and passes the board size to your Opoly constructor.

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•