ISC Computer Science Theory Paper 2023 Program Transpose of a Matrix

 

import java.util.*;

public class Matrix {

    public static void main(String[] args) {

        // Create a single Scanner object for System.in

        Scanner scanner = new Scanner(System.in);

        // Pass the single Scanner object to the Trans constructor

        Trans obj = new Trans(scanner);

        obj.fillarray();

        obj.display();

        // Close the Scanner

        scanner.close();

    }

}

class Trans {

    private int m;

    private int[][] arr;

    private int[][] arrT;

    private Scanner in;

    Trans(Scanner scanner) {

        this.in = scanner;

        System.out.println("Enter the order (size) of the square matrix:");

        this.m = in.nextInt();

        this.arr = new int[m][m];

        this.arrT = new int[m][m];

    }

    public void fillarray() {

        System.out.println("\n--- Entering elements for the " + m + "x" + m + " matrix ---");

        for (int i = 0; i < m; i++) {

            for (int j = 0; j < m; j++) {

               

                System.out.println("Input element at [" + i + "][" + j + "]:");

                arr[i][j] = in.nextInt();

            }

        }

    }

    public void display() {

        System.out.println("\nORIGINAL MATRIX:");

        printMatrix(arr);

        transpose();

    }

    private void transpose() {

        System.out.println("\nTRANSPOSE OF THE MATRIX:");

        // The core logic for transpose: ArrT[i][j] = Arr[j][i]

        for (int i = 0; i < m; i++) {

            for (int j = 0; j < m; j++) {

                arrT[i][j] = arr[j][i];

            }

        }

        printMatrix(arrT);

    }

    // Helper method for cleaner printing and better formatting

    private void printMatrix(int[][] matrix) {

        for (int i = 0; i < m; i++) {

            for (int j = 0; j < m; j++) {

                // Use format for aligned columns, which improves readability

                System.out.format("%5d", matrix[i][j]);

            }

            System.out.println();

        }

    }

}