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NEEDS TO BE IN JAVA AND COMPILE IN REPL.iT Project: Battleship For the final project you will write a text-based guessing game, similar to Battleship. The game is played on a 10x10 array of spaces. The first player places a 4-space "ship" vertically or horizontally on the board. For example: After the first player has entered the ship's position, the board is cleared and the second player is given a view of the board with the ship's position hidden. The second player guesses a coordinate, and the board is marked with an X for a hit, and an O for a miss. Guessing continues until either all 4 ship positions are found (player 2 wins) or there are 5 misses (player 1 wins). Then the game reports the winner and displays the full board (showing all misses and the ship)Battleship Assignment Discussion Paper.

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1. Getting the ship position from player 1

Player one specifies the ship's position with 4 numbers between 0 and 9: the x and y coordinates of the front of the ship (bow), and the x and y coordinates of the back (stern). For the purposes of the game, bow and stern are indistinguishable, so it doesn't matter which end the player enters first. The first ship above could have been specified with: Enter the x coordinate of the bow: 6 Enter the y coordinate of the bow: 3 Enter the x coordinate of the stern: 3 Enter the y coordinate of the stern: 3 A valid coordinate is an integer from 0 to 9. A valid ship will have the same value in both points for either x or y. For example, the ship specified above has a value of 3 for the y coordinate of both points. The ship in the second game board has a value of 8 for the x coordinate of both points. Your program should repeatedly prompt for each coordinate until a valid (0-9) value is entered. After all 4 coordinates are entered your program should check to make sure the 2 points describe a valid ship (i.e. share a value for either x or y). If not, your program should reprompt for all 4 values. Enter the x coordinate of the bow: 6 Enter the y coordinate of the bow: 3 Enter the x coordinate of the stern: 3 Enter the y coordinate of the stern: 4 Invalid coordinates. Bow & stern must have the same value for either x or y. Enter the x coordinate of the bow:  

2. Clear screen, display board Your program should clear the screen so player 2 cannot see the coordinate player 1 entered. You can do this by printing a special escape sequence: System.out.print("\033[2J"); Then the program prints an empty board with coordinates. Use periods to denote spaces where no guess has yet occurred. Battleship Assignment Discussion Paper

0123456789 0.......... 1.......... 2.......... 3.......... 4.......... 5.......... 6.......... 7.......... 8.......... 9..........

3. Player 2 makes guesses A valid guess is a pair of coordinates from 0 to 9 which have not previously been guessed. If a coordinate is invalid the program reprompts. If the point is invalid (because it was guessed already) the program reprompts for both coordinates. Enter the x value of the guess: xxx Invalid, non-numeric Enter the x value of the guess: 10 Invalid, out of range [0-9] Enter the x value of the guess: 2 Enter the y value of the guess: 7 Then the board is displayed, including the misses remaining.

0123456789 0.......... 1.......... 2.......... 3.......... 4.......... 5.......... 6.......... 7..O....... 8.......... 9.......... There are 4 misses remaining.

4. Final board display, announce winner After as many as 8 guesses the game will be over (3 hits, 5 misses). If player 1 wins, player 2 will not know the actual position of the ship. So when the game is over the program displays the actual position of the ship. Ship positions that were guessed are denoted by a capital X; positions that were never hit are shown as lower-case x's.

  0123456789 0.......... 1.....O..... 2.......... 3...xxXx... 4.....O.... 5...O...... 6.......... 7..O....O.. 8.......... 9.......... Game over, player 1 wins.

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Non-functional requirements You must represent the game board as a 2-dimensional array of char. You must declare and use a final int boardSize=10, so that it is easy to update the game's size. You must write and use the following functions Battleship Assignment Discussion Paper

• boolean isValidShip(int x1, int y1, int x2, int y2) Returns true if the coordinates describe a valid ship, false otherwise

 

• boolean isValidGuess(int x, int y, char[][] board) Returns true if the given location is valid and has not previously been guessed, false otherwise.
• void printBoard(char[][] board, boolean final) Prints the board as shown in the examples above. If final is false, unguessed ship locations are displayed as periods. If final is true, unguessed ship locations are displayed as lowercase x's. Battleship Assignment Discussion Paper