Natour, O. 12/3/15 Csc-111-D01 Extracredit(Exam 4)

/*
 * Name:Omar Natour
 * Date: 12/3/15
 * Course Number: Csc-111-D01
 * Course Name: Intro to Java
 * Problem Number: Extra Credit(Exam 4)
 * Email:[email protected]
 * Short Description of the Problem: Generate and array with an even number of ones in ever row and column.
 */

import java.util.Scanner;
import java.lang.Math;

public class ExtraCred {
    public static void main(String[] args) {
        final String TITLE = "Even Number of Ones Array Generator";
        final String CONTINUE_PROMPT = "Do this again? [y/N] ";

        System.out.println("Welcome to " + TITLE + "!");
        Scanner sc = new Scanner(System.in);
        String doover;
        do {
            print(correct(generate(collect())));

            System.out.print(CONTINUE_PROMPT);
            doover = sc.next();
        } while (doover.equalsIgnoreCase("Y"));

        sc.close();
        System.out.println("Thank you for using " + TITLE + ".");
    }

    public static int[] collect() {
        Scanner input = new Scanner(System.in);
        int[] size = new int[2];

        System.out.print("Please enter a value of the rows and column length of your matrix:");

        for (int i = 0; i < size.length; i++)
            size[i] = input.nextInt();

        // input.close(); // this seems to close sc as well. why is that?
        return size;
    }

    public static int[][] generate(int[] spec) {
        int[][] matrix = new int[spec[0]][spec[1]];

        for (int i = 0; i < (spec[0]); i++) {
            for (int j = 0; j < (spec[1]); j++) {
                matrix[i][j] = (int) (Math.random() * 2);
            }
        }
        return matrix;
    }

    public static int[][] correct(int[][] inc) {
        int[][] correct = inc;
        int[] size1 = { inc.length, inc[0].length };
        int[] rowC = new int[inc.length];
        int[] columnC = new int[inc[0].length];

        boolean row = false;
        boolean column = false;

        while (!(row && column)) {
            for (int i = 0; i < rowC.length; i++)
                rowC[i] = 0;
            for (int i = 0; i < columnC.length; i++)
                columnC[i] = 0;

            for (int i = 0; i < inc.length; i++) {
                for (int j = 0; j < inc[0].length; j++) {
                    if (inc[i][j] == 1)
                        rowC[i]++;
                }
            }

            for (int i = 0; i < inc[0].length; i++) {
                for (int j = 0; j < inc.length; j++) {
                    if (inc[j][i] == 1)
                        columnC[i]++;
                }
            }

            for (int i = 0; i < inc.length; i++) {
                if (rowC[i] % 2 != 0) {
                    row = false;
                    break;
                } else
                    row = true;
            }

            for (int i = 0; i < inc[0].length; i++) {
                if (columnC[i] % 2 != 0) {
                    column = false;
                    break;
                } else
                    column = true;
            }

            if (!(row))
                inc = generate(size1);
            else if (!(column))
                inc = generate(size1);
            else
                correct = inc;
        }
        return correct;
    }

    public static void print(int[][] p) {
        for (int i = 0; i < p.length; i++) {
            for (int j = 0; j < p[0].length; j++)
                System.out.print(p[i][j]);
            System.out.println();
        }
    }
}