// Matrix
/**
* Benis Munezero
* COSC 237 Sec 001
* Lab 3 Task 2, Array
*/
import java.util.Scanner;
import java.util.Random;
public class Main {
public static final int MIN = 0;
public static final int MAX = 2;
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
boolean startContinue = getChar(sc, "Start (y/n): ");
while (startContinue) {
//int line = 0;
int rows = getInt(sc, "How many rows: ");
int columns = getInt(sc, "How many columns: ");
int[][] matrix = new int[rows][columns];
initRand (matrix, MIN, MAX);
System.out.println("\nThe Matrix is:");
print2DimArray(matrix);
System.out.println();
isFlipped(matrix);
startContinue = getChar(sc, "Continue (y/n): ");
}
System.out.println("Have a nice day:)");
}
public static int getInt(Scanner in, String prompt) {
System.out.print(prompt);
while (!in.hasNextInt()) {
in.next();
System.out.println("Error! Not a valid intenger.\nPlease input a valid intenger!");
}
return in.nextInt();
}
public static void print2DimArray(int[][] arr) {
for (int i = 0; i < arr.length; i++) {
System.out.print("[" + i + "] ");
for (int j = 0; j < arr[i].length; j++) {
System.out.printf("%d ", arr[i][j]);
}
System.out.println();
}
}
public static boolean getChar(Scanner in, String prompt) {
boolean isValid;
String s;
do {
System.out.print(prompt);
s = in.next();
isValid = (s.equalsIgnoreCase("y") || s.equalsIgnoreCase("n"));
if (!isValid) {
System.out.println("Error! Entry must be 'y' or 'n'. Try again.");
}
} while (!isValid);
return s.equalsIgnoreCase("y");
}
public static void initRand(int[][] nums, int low, int up) {
Random rand = new Random();
for (int i = 0; i < nums.length; i++) {
for (int j = 0; j < nums[i].length; j++) {
nums[i][j] = rand.nextInt(up - low) + low;
}
}
}
public static void isFlipped(int[][] matrix) {
boolean flipped = false;
for (int i = 0; i < matrix.length - 1; i++) {
for (int j = i + 1; j < matrix.length; j++) {
boolean isFlipped = true;
for (int k = 0; k < matrix[i].length; k++) {
if (matrix[i][k] == matrix[j][k]) {
isFlipped = false;
break;
}
}
if (isFlipped) {
System.out.printf("Rows index %d and %d are flipped.\n", i, j);
flipped = true;
}
}
}
if (!flipped) {
System.out.println("No rows are flipped.");
}
}
}