CSC-111

/*
 * Name: Joshua Bednaz
 * Date: 12/4/16
 * Course Number: CSC-111
 * Course Name: Intro to Java programming
 * Problem Number: Bones problem
 * Email: jabednaz0001@student.stcc.edu
 * This program makes a matrix and then checks if it has an even number of ones in each column and row.
    It will loop and make a new arrays until one is correct.
 */
import java.util.Scanner;

public class matrixchallangerevised {

    private static boolean doThisAgain(Scanner sc, String prompt) {
        System.out.print(prompt);
        String doOver = sc.nextLine();
        return doOver.equalsIgnoreCase("Y");
    }

    // get input row and column
    private static String[] process(Scanner sc) {
        int a;
        int b;
        System.out.print("Enter number of rows: \n");
        a = sc.nextInt();
        System.out.print("Enter number of Columes: \n");
        b = sc.nextInt();
        String s[] = { Integer.toString(a), Integer.toString(b) };
        return s;
    }

    // check if matrix is possible
    private static boolean scancheck(String s[]) {
        boolean t = false;
        int a = Integer.parseInt(s[0]);
        int b = Integer.parseInt(s[1]);
        if ( a < 2 || b < 2) {
            t = true;
            System.out.println("The following inputs both arent even.");
            System.out
                    .println("It wil be impossible to generate a materix and comply with the requiments with rows of "
                            + a + " and columes " + b + ".");
        }
        return t;
    }

    // initarray=====================================
    private static int[][] initarray(String s[], Scanner input) {
        int b = Integer.parseInt(s[0]);
        int c = Integer.parseInt(s[1]);
        int[][] a = new int[b][c];
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[i].length; j++) {
                a[i][j] = (int) (2 * Math.random());
            }
        }
        return a;
    }// ==========================================================

    // display array ===========================
    private static String display(int[][] a) {
        String s = "";
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[i].length; j++) {
                s = s + Integer.toString(a[i][j]) + " ";
            }
            s = s + "\n";
        }
        return s;
    }

    // matrix check horizontal check====================
    private static boolean checkHM(int a[][]) {
        int one = 0;
        for (int i = 0; i < a.length; i++){
            for (int j = 0; j < a[i].length; j++)
                if (a[i][j] == 1)
                    one++;
            if ( one % 2 != 0)
                return false;
            one = 0;
        }
        return true;
    }

    //Matrix check vertical =====================
    private static boolean checkVM(int a[][]){
        int one = 0;
        for (int k = 0 ; k < a.length ; k++){
        for (int j = 0; j < a[1].length; j++){
            for (int i =0 ; i< a.length; i++)
                    if (a[i][j] == 1)
                        one++;
            if ( one % 2 != 0)
                return false;
            one = 0;
        }
        }
        return true;
        }

    //matrix check both horizontal and vertical
    private static boolean checkM(int a[][]){
        return (checkHM(a)&&checkVM(a));
    }


    private static void run(Scanner input) {
        String sCheck[]= process(input);
        if (scancheck(sCheck)){
            return;
        }
        int[][] a={};
        int count =0;
        do {
            a =  initarray(sCheck, input);
            count++;
        }while(!checkM(a));
        System.out.println("it took " + count+ " trys to get the followung array");
        System.out.println(display(a));
    }

    public static void main(String args[]) {
        final String TITLE = "Matrix Challenge";
        final String CONTINUE_PROMPT = "Do this again? [y/N] ";
        final String rules = "All rows and columns must have the same number of zeros and ones.";
        System.out.println("Welcome to " + TITLE);
        System.out.println(rules);
        Scanner input = new Scanner(System.in);
        do {
            run(input);
            input.nextLine();
        } while (doThisAgain(input, CONTINUE_PROMPT));
        input.close();
        System.out.println("Thank you for using " + TITLE);
    }

}