Battleship 2D Array Program
here is basically the instructions for the full program i have to write so that it is clear. up to this point, it seems to work except:
1. when i run it, the ship should take up 4 values/spots on the board so in end, there should be 4 '*''s, but i run it fully through & notice only one spot is hit while the rest are 'x''s. am i checking correctly?
2. when i check the input for the column letter, if i enter anything other than a letter, such as a number, it prints that it is an "invalid option", but nothing happens. the user should be able to guess again.
3. lastly, i'm stumped in how to make sure that whatever the user inputs to fire, isn't a location that's already been chosen.
http://i55.tinypic.com/2lcnps3.jpg
i'm not completely done wi/ the code, but this what i have thus far:
Code:
import java.util.Random;
import java.util.Scanner;
public class assignment17 {
static Scanner in = new Scanner(System.in);
public static void main(String[] args) {
int choice = 0;
board();
char[][] values = { { ' ', 'A', 'B', 'C', 'D', 'E' },
{ '1', '-', '-', '-', '-', '-' },
{ '2', '-', '-', '-', '-', '-' },
{ '3', '-', '-', '-', '-', '-' },
{ '4', '-', '-', '-', '-', '-' },
{ '5', '-', '-', '-', '-', '-' } };
do{
choice = menu();
switch(choice){
case 1: System.out.println("Enter a Row Number: ");
int guessRow = rowCheck();
System.out.println("Enter a Column Letter: ");
String guessColumn = columnCheck1();
int colLocation = columnCheck(guessColumn);
int ROWS = 6;
int COLS = 6;
hitormiss(guessRow, colLocation, ROWS, COLS, values);
break;
case 2:
break;
case 3:
break;
default:System.out.println("Invalid Input");
break;
}
}while(choice != 3);
}
// method to display the main menu
public static int menu() {
System.out.println("Menu:");
System.out.println("1. Fire Shot");
System.out.println("2. Show Solution");
System.out.println("3. Quit");
int menuOption = 0;
boolean test = true;
while (test) {
if (in.hasNextInt()) {
menuOption = in.nextInt();
test = false;
} else {
String junk = in.next();
System.out.println("Invalid Input");
}
}
return menuOption;
}
// method to display board
public static void board() {
final int ROWS = 6;
final int COLS = 6;
char[][] values = { { ' ', 'A', 'B', 'C', 'D', 'E' },
{ '1', '-', '-', '-', '-', '-' },
{ '2', '-', '-', '-', '-', '-' },
{ '3', '-', '-', '-', '-', '-' },
{ '4', '-', '-', '-', '-', '-' },
{ '5', '-', '-', '-', '-', '-' } };
for (int row = 0; row < ROWS; row++) {
for (int col = 0; col < COLS; col++) {
System.out.print(" " + values[row][col]);
}
System.out.println("\n");
}
}
// method to check input for guessing the row
public static int rowCheck() {
int guessRow = 0;
boolean test = true;
while (test) {
if (in.hasNextInt()) {
guessRow = in.nextInt();
if (guessRow < 1 || guessRow > 5) {
System.out.println("Invalid Input - Retry");
} else if (guessRow >= 1 || guessRow < 6) {
test = false;
}
} else {
String dummy = in.next();
System.out.println("Invalid Input - Retry");
}
}
return guessRow;
}
// method to guess column
public static int locationCol() {
System.out.println("Enter a Column Letter: ");
in.nextLine();
String guessColumn = in.nextLine();
char c = guessColumn.charAt(0);
int colLocation = (c - 'A') + 1;
return colLocation;
}
public static String columnCheck1() {
in.nextLine();
String guessColumn="";
boolean test = true;
while (test) {
if (in.hasNextLine()) {
guessColumn = in.nextLine();
test = false;
}
else {
int dummy = in.nextInt();
System.out.println("Invalid Input - Retry");
}
}
return guessColumn;
}
// method to check input for guessing the column
public static int columnCheck(String guessColumn) {
char c=' ';
do{
c = guessColumn.charAt(0);
switch (c) {
case 'A':
break;
case 'B':
break;
case 'C':
break;
case 'D':
break;
case 'E':
break;
default:
System.out.println("Invalid Option");
}
}while (c != 'A' && c != 'B' && c != 'C' && c != 'D' && c != 'E');
int colLocation = (c - 'A') + 1;
return colLocation;
}
// method to check if shot hit or miss
public static void hitormiss(int guessRow, int colLocation, int ROWS,
int COLS, char[][] values) {
Random rand = new Random();
int x = rand.nextInt(4); // goes from 0-3, excludes 4
int y = rand.nextInt(4);
if (guessRow == x && colLocation == y) {
values[guessRow][colLocation] = '*';
System.out.println("hit");
for (int row = 0; row < ROWS; row++) {
for (int col = 0; col < COLS; col++) {
System.out.print(" " + values[row][col]);
}
System.out.println("\n");
}
}
else if (guessRow == x + 1 && colLocation == y + 1) {
values[guessRow][colLocation] = '*';
System.out.println("hit");
for (int row = 0; row < ROWS; row++) {
for (int col = 0; col < COLS; col++) {
System.out.print(" " + values[row][col]);
}
System.out.println("\n");
}
}
else if (guessRow == x + 1 && colLocation == y) {
values[guessRow][colLocation] = '*';
System.out.println("hit");
for (int row = 0; row < ROWS; row++) {
for (int col = 0; col < COLS; col++) {
System.out.print(" " + values[row][col]);
}
System.out.println("\n");
}
}
else if (guessRow == x && colLocation == y + 1) {
values[guessRow][colLocation] = '*';
System.out.println("hit");
for (int row = 0; row < ROWS; row++) {
for (int col = 0; col < COLS; col++) {
System.out.print(" " + values[row][col]);
}
System.out.println("\n");
}
} else {
values[guessRow][colLocation] = 'x';
System.out.println("miss");
for (int row = 0; row < ROWS; row++) {
for (int col = 0; col < COLS; col++) {
System.out.print(" " + values[row][col]);
}
System.out.println("\n");
}
}
}
}
