Play method. this method should allow me to enter commands to rotate a certain row or column of a 4x4 array. it needs to be in a loop (i assume while) to always ask for a command, do the rotation, and print it and end when back to the original, I'm having trouble with what i should have as the while loop, i have a default and a current variable, i use puzzle both times so default gets overwritten (this is what is wrong) so the loop doesn't run, i don't really know how to get around this, i know it doesn't need to be puzzle both times however I've kept it in just to show.
import java.util.Scanner;
public class puzzle {
public static final int N = 4;
public static final int NUMBER_OF_ROTATIONS = 5;
public static void main(String[] args) {
int[][] puzzle = new int[N][N];
reset(puzzle);
test(puzzle);
reset(puzzle);
scramble(puzzle);
System.out.println("### Testing puzzle game play\n");
play(puzzle);
}
public static void print(int[][] puzzle) {
for (int[] row : puzzle) {
for (int elem : row) {
System.out.printf("%4d", elem);
}
System.out.println();
}
System.out.println();
}
public static void test(int[][] puzzle) {
System.out.println("### Testing reset method\n");
print(puzzle);
System.out.println("### Testing rotate methods\n");
print(puzzle);
for (int i = 0; i < N; i++) {
System.out.println("### rotateColumn(" + i + ")\n");
rotateColumn(puzzle, i);
print(puzzle);
System.out.println("### rotateRow(" + i + ")\n");
rotateRow(puzzle, i);
print(puzzle);
}
reset(puzzle);
System.out.println("### Testing random rotations\n");
print(puzzle);
for (int i = 0; i < 5; i++) {
randomRotation(puzzle);
print(puzzle);
}
}
public static int[][] reset(int[][] puzzle) {
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++)
puzzle[i][j] = i * N + j;
}
return puzzle;
}
public static void scramble(int[][] puzzle) {
for (int i = 0; i < NUMBER_OF_ROTATIONS; i++) {
randomRotation(puzzle);
}
}
// TODO: Implement method as specified in assignment brief
public static void rotateRow(int[][] arr, int row) {
int newRow = arr[row][arr.length - 1];
int nextRow;
for (int IndexNo = 0; IndexNo < arr.length; IndexNo++) {
nextRow = arr[row][IndexNo];
arr[row][IndexNo] = newRow;
newRow = nextRow;
}
}
// TODO: Implement method as specified in assignment brief
public static void rotateColumn(int[][] arr, int column) {
int newCol = arr[arr.length - 1][column];
int nextCol;
for (int IndexNo = 0; IndexNo < arr.length; IndexNo++) {
nextCol = arr[IndexNo][column];
arr[IndexNo][column] = newCol;
newCol = nextCol;
}
}
// TODO: Implement method as specified in assignment brief
public static void randomRotation(int[][] puzzle) {
int rowrandom = (int) (Math.random() * 3 + 1);
int colrandom = (int) (Math.random() * 3 + 1);
int option = (int) (Math.random() * 2 + 1);
if (option == 1) {
rotateRow(puzzle, rowrandom);
} else {
rotateColumn(puzzle, colrandom);
}
}
// TODO: Implement method as specified in assignment brief
static void play(int[][] puzzle) {
reset(puzzle);
int[][] Default = puzzle;
print(puzzle);
for (int i = 0; i < 5; i++) {
randomRotation(puzzle);
}
int[][] Current = puzzle;
print(puzzle);
while (Current!=Default) {
System.out.println("enter row x or col x: ");
Scanner input = new Scanner(System.in);
String x = input.nextLine();
if (x.equals("row 0")) {
rotateRow(puzzle, 0);
print(puzzle);
}
if (x.equals("row 1")) {
rotateRow(puzzle, 1);
print(puzzle);
}
if (x.equals("row 2")) {
rotateRow(puzzle, 2);
print(puzzle);
}
if (x.equals("row 3")) {
rotateRow(puzzle, 3);
print(puzzle);
}
if (x.equals("col 0")) {
rotateColumn(puzzle, 0);
print(puzzle);
}
if (x.equals("col 1")) {
rotateColumn(puzzle, 1);
print(puzzle);
}
if (x.equals("col 2")) {
rotateColumn(puzzle, 2);
print(puzzle);
}
if (x.equals("col 3")) {
rotateColumn(puzzle, 3);
print(puzzle);
}
}
}
}
