class Transpose {

    /*
     * Here is my solution to Exercise 1.4.13 on page 114 of our text book.
     */
    public static void main(String[] args) {
        int [][] a = { {1, 2, 3, 4},
                       {5, 6, 7, 8},
                       {0, 1, 2, 1},
                       {2, 3, 4, 5} };

        System.out.println("The original matrix (before transposing):");
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a.length; j++)
                System.out.print(a[i][j] + " ");
            System.out.println();
        }

        for (int i = 0; i < a.length; i++) {
            for (int j = i+1; j < a.length; j++) {
                int t = a[i][j];
                a[i][j] = a[j][i];
                a[j][i] = t;
            }
        }

        System.out.println("\nThe matrix after transposing:");
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a.length; j++)
                System.out.print(a[i][j] + " ");
            System.out.println();
        }
    }

}