Question & Answer: to create a 5×5 grid that represents the gameboard. "+" signs represent spaces that haven't been bombed. "O" repre…..

Code:

import java.util.*;
public class battleship {
char[][] myboard, ships;

public battleship(){
myboard = new char[5][5]; // User’s game board
int i, j;
// Initializing game
for(i = 0; i < 5; i++){
for(j = 0; j < 5; j++)
myboard[i][j] = ‘+’;
}
ships = setGame(); // Setting ships on board
}

public void display(char[][] myboard){
// To display board
int i,j;
for(i = 0; i < 5; i++){
for(j = 0; j < 5; j++)
System.out.print(myboard[i][j] + ” “);
System.out.println();
}
}

public void update(int row, int column, char c){
myboard[row][column] = c; // Updating user’s board after each round
}

public boolean gameover(){ // To check if game’s over
int i, j;
for(i = 0; i < 5; i++){
for(j = 0; j < 5; j++){
if(ships[i][j] == ‘b’ && myboard[i][j] != ‘X’){ // If any location of ship has not been hit yet
return false;
}
}
}
return true;
}

public void play(){
int row, column;
Scanner sc = new Scanner(System.in);
display(myboard);
while(!gameover()){ // Iterates until game’s over
System.out.print(“Enter row no.: “);
row = sc.nextInt() – 1;
System.out.print(“Enter column no.: “);
column = sc.nextInt() – 1;
while(!(row >= 0 && row <= 4 && column >= 0 && column <= 4)){ // If user enters wrong location details
System.out.println(“Location doesn’t exist. Please try again.n”);
System.out.print(“Enter row no.: “);
row = sc.nextInt() – 1;
System.out.print(“Enter column no.: “);
column = sc.nextInt() – 1;
}
if(ships[row][column] == ‘b’) // If it is a hit
update(row, column, ‘X’);
else
update(row, column, ‘O’);
display(myboard);
}
System.out.println(“Game Overn”);
}

public char[][] setGame()
{
char[][] shipBoard = new char[5][5];
int i, j, k, range = 5, alignment, startRow, startCol, len;
boolean isfree;
for(i = 0; i < 5; i++)
for(j = 0; j < 5; j++)
shipBoard[i][j] = ‘*’;
Random rand = new Random();
// Setting ships on board randomly
for(i = 1; i <= 5; i++)
{
alignment = rand.nextInt(2); // 0 – row wise, 1 – column wise
if(alignment == 0) // Set ship row wise on board
{
startRow = rand.nextInt(range); // Select row
startCol = rand.nextInt(range – 1); // Select column so that ship can be of length of 2 blocks
len = rand.nextInt((range – startCol – 1 – 1) + 1) + 1; // Select length so that ship can be of 2 blocks at least
if((startCol + len) >= range) // Checking if there’s place for ship
isfree = false;
else{
isfree = true;
for(j = startCol; j <= startCol + len; j++)
{
if(shipBoard[startRow][j] == ‘b’) // Checking if the place has already been booked
{
isfree = false;
break;
}
}
}
if(isfree){ // If there’s place, then place the ship
for(j = startCol; j <= startCol + len; j++)
shipBoard[startRow][j] = ‘b’;
}
else
i–; // Otherwise iterate one more item
}
else // For column wise alignment of ship on board
{
startCol = rand.nextInt(range); // Select start column
startRow = rand.nextInt(range – 1); // Select start row so that ship can be of at least 2 blocks length
len = rand.nextInt((range – startRow – 1 – 1) + 1) + 1; // Choose length so that ship can be of 2 blocks length
if((startRow + len) >= range) // Checking if there’s place for placing ship
isfree = false;
else{
isfree = true;
for(j = startRow; j <= startRow + len; j++)
{
if(shipBoard[j][startCol] == ‘b’){ // If the place has been booked or not
isfree = false;
break;
}
}
}
if(isfree){ // If there’s place, then place ship
for(j = startRow; j <= startRow + len; j++)
shipBoard[j][startCol] = ‘b’;
}
else
i–;
}
}
return shipBoard;
}

public static void main(String args[]){
battleship board = new battleship(); // Create object
board.play(); // Start the game
}
}

Output: