JavaTest/src/ch1/ex14/Main.java - main - EugenyCh7/JavaAndScalaLessons

JavaTest/src/ch1/ex14/Main.java
66 строк2 KB
Eugeny Chekmarev
IDEA update
15 июн 2021, 21:11
15 июн 2021, 21:1147fadf9
package ch1.ex14;

import java.util.ArrayList;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        ArrayList<ArrayList<Integer>> matrix = new ArrayList<>();
        int side = 0;
        int row = 0;
        String input;
        do {
            input = in.nextLine();
            String[] subs = input.trim().split("\\s+");
            ArrayList<Integer> line = new ArrayList<>();
            for (String sub :
                    subs) {
                line.add(Integer.parseInt(sub));
            }
            matrix.add(line);
            if (side == 0)
                side = line.size();
            else if (side != line.size()) {
                System.out.println("Bad matrix");
                System.exit(-1);
            }
        } while (++row < side);
        System.out.println("Good matrix");
        boolean magicDiagonal;
        boolean magicRows = true;
        boolean magicColumns = true;
        // Diagonals
        int magicNumber = 0;
        for (int i = 0; i < side; i++)
            magicNumber += matrix.get(i).get(i);
        int nextNumber = 0;
        for (int i = 0; i < side; i++)
            nextNumber += matrix.get(i).get(side - i - 1);
        magicDiagonal = magicNumber == nextNumber;
        // Rows
        for (int y = 0; y < side; y++) {
            nextNumber = 0;
            for (int x = 0; x < side; x++)
                nextNumber += matrix.get(y).get(x);
            if (nextNumber != magicNumber) {
                magicRows = false;
                break;
            }
        }
        // Columns
        for (int x = 0; x < side; x++) {
            nextNumber = 0;
            for (int y = 0; y < side; y++)
                nextNumber += matrix.get(y).get(x);
            if (nextNumber != magicNumber) {
                magicColumns = false;
                break;
            }
        }
        System.out.printf("Magic diagonals : %B\n", magicDiagonal);
        System.out.printf("Magic rows : %B\n", magicRows);
        System.out.printf("Magic columns : %B\n", magicColumns);
        System.out.printf("Magic : %B\n", magicDiagonal && magicRows && magicColumns);
    }
}