Assignment - Battleship

You are going to code a game of Battleship. This two files you will need are battleship.java and ships.txt. Our game will have three submarines (S), two cruisers (C), and one destroyer (D) hidden on the grid. The grid will always be 8X5.

The ocean/grid is made of an object.

You may not change this:

public class square

{

    public char inhere;

    /* Note - possible values of inhere are:

        * = nothing is in that square

        S = submarine is in that square

        C = cruiser is in that square

        D = destroyer is in that square

    */

    public boolean visible;

    /* If the user has guessed that square, it becomes visible

       This means the value 'inhere' will be printed to the screen

    */

}

The actual ocean is declared like this.

You may not change this:

square ocean [] [] = new square [5] [8];

int sizex = 5;

int sizey = 8;

Steps:

• Make a new method in your program read the file into the array of objects to give the ocean its proper values.

• public static void readocean (square ocean[][], int sizex, int sizey);

• The file ships.txt on the I:// makes up a grid like the following:

* * * * * D * S

* C C C * D * S

C * * * * D * *

C * * S * D * *

C * * S * * S S

• Make a new method in your program that allows the user to make one turn.

• They will pick an x and a y co-ordinate (like in x’s and o’s).

• That square needs to be set to visible.

• The ocean needs to be reprinted.

• public static void oneturn(square ocean[][], int sizex, int sizey)

• Make a new method that decides when the game is over. (No squares will have their visible variables set to false).

• public static Boolean gameover (square ocean[][], int sizex, int sizey);

• Make a loop in void main that goes until (a) the user is sick of the game and wants to quit or (b) the game is over – use your gameover method.

Some suggestions to make it into a level 4:

• Use applets.

• Keep a score – the number of guesses the user has had so far

• Get the user’s name and insert it into all kinds of places.

• Give really clear instructions. For example, how many crusisers are remaining? How many submarines?

• Tell the user when a battleship was sunk (since they are more than one square, this is hard).

Normal style issues apply:

• Pre and post conditions

• Comments

• Title comments (name, date, title)

• Tabbing and white space

An example run of the game

-- WELCOME TO BATTLESHIP --

What is your name? Grace Murray Hopper

Welcome Grace Murray Hopper, this game is designed to test if you have what it takes to be an admiral in the navy.

If you find all of the ships:

- in under 20 tries, your rank will be admiral.

- in under 25 tries, your rank will be captain.

- in under 30 tries, your rank will be ensign.

- in over 30 tries, you won’t be admitted to serve in the navy!

Grace Murray Hopper, are you ready to begin? (y,n) y

--- The Ocean ---

    ~~~~~~~~

    ~~~~~~~~

    ~~~~~~~~

    ~~~~~~~~

    ~~~~~~~~

Enter the x co-ordinate (0-4): 1

Enter the y co-ordinate (0-7): 1

Grace Murray Hopper, You have a hit!

You have taken 1 turn. You have 15 out of 16 ships remaining.

--- The Ocean ---

    ~~~~~~~~

    ~C~~~~~~

    ~~~~~~~~

    ~~~~~~~~

    ~~~~~~~~

Enter the x co-ordinate (0-4): 0

Enter the y co-ordinate (0-7): 0

Grace Murray Hopper, You missed!

You have taken 2 turns. You have 15 out of 16 ships remaining.

and so on!