/*Write a program to declare a square matrix A[][] of order M x M where ‘M’ is the
number of rows and the number of columns, such that M must be greater than 2 and less
than 10. Accept the value of M as user input. Display an appropriate message for an
invalid input. Allow the user to input integers into the matrix. Perform the following
tasks:
a) Display the original matrix.
b) Rotate the matrix 90º clockwise as shown below:
Original matrix Rotated matrix
1 2 3 7 4 1
4 5 6 8 5 2
7 8 9 9 6 3
c) Find the sum of the elements of the four corners of the matrix. Test your program
for the following data and some random data:
Example 1:
INPUT : M=3
3 4 9
2 5 8
1 6 7
OUTPUT:
ORIGINAL MATRIX
3 4 9
2 5 8
1 6 7
MATRIX AFTER ROTATION
1 2 3
6 5 4
7 8 9
Sum of the corner elments = 20
Example 2:
INPUT : M=4
1 2 4 9
2 5 8 3
1 6 7 4
3 7 6 5
OUTPUT:
ORIGINAL MATRIX
1 2 4 9
2 5 8 3
1 6 7 4
3 7 6 5
MATRIX AFTER ROTATION
3 1 2 1
7 6 5 2
6 7 8 4
5 4 3 9
Sum of the corner eements= 18
EXAMPLE 3.
INPUT : M = 14
OUTPUT:
SIZE OUT OF RANGE*/
number of rows and the number of columns, such that M must be greater than 2 and less
than 10. Accept the value of M as user input. Display an appropriate message for an
invalid input. Allow the user to input integers into the matrix. Perform the following
tasks:
a) Display the original matrix.
b) Rotate the matrix 90º clockwise as shown below:
Original matrix Rotated matrix
1 2 3 7 4 1
4 5 6 8 5 2
7 8 9 9 6 3
c) Find the sum of the elements of the four corners of the matrix. Test your program
for the following data and some random data:
Example 1:
INPUT : M=3
3 4 9
2 5 8
1 6 7
OUTPUT:
ORIGINAL MATRIX
3 4 9
2 5 8
1 6 7
MATRIX AFTER ROTATION
1 2 3
6 5 4
7 8 9
Sum of the corner elments = 20
Example 2:
INPUT : M=4
1 2 4 9
2 5 8 3
1 6 7 4
3 7 6 5
OUTPUT:
ORIGINAL MATRIX
1 2 4 9
2 5 8 3
1 6 7 4
3 7 6 5
MATRIX AFTER ROTATION
3 1 2 1
7 6 5 2
6 7 8 4
5 4 3 9
Sum of the corner eements= 18
EXAMPLE 3.
INPUT : M = 14
OUTPUT:
SIZE OUT OF RANGE*/
import java.util.*;
public class ISC2015Q2 {
public static void main(String[] args) {
int M;
Scanner in = new Scanner(System.in);
do {
System.out.println("Enter the order of the matrix");
M = in.nextInt();
if(M < 2 || M >
10)
System.out.println("INVALID INPUT, TRY
AGAIN:");
}while(M < 2
|| M > 10);
MatrixRotation Mat_Object = new MatrixRotation(M);
Mat_Object.MatrixInput();
Mat_Object.DisplayInputMatrix();
Mat_Object.RotateMatrix();
Mat_Object.DisplayRotatedMatrix();
System.out.println("Sum of corner elements:"+Mat_Object.SumOfCornerElements());
}
}
class MatrixRotation {
MatrixRotation(int M) {
order = M;
Sum_of_Corner_Elements = 0;
Mat = new int[order][order];
Rotated_Mat = new int[order][order];
}
public int SumOfCornerElements() {
return (Rotated_Mat[0][0]+Rotated_Mat[0][order-1]+Rotated_Mat[order-1][0]+Rotated_Mat[order-1][order-1]);
}
public void DisplayRotatedMatrix() {
System.out.println("OUTPUT");
System.out.println("Rotated matrix:");
for(int i=0;i<order;i++) {
for(int j=0;j<order;j++)
System.out.print(Rotated_Mat[i][j]+" ");
System.out.println();
}
}
public void RotateMatrix(){
int k;
k=order;
for(int i=0; i<order;i++) {
for(int j=0;j<order;j++)
Rotated_Mat[j][k-1]=Mat[i][j];
k--;
}
}
public void MatrixInput() {
Scanner in = new Scanner(System.in);
System.out.println("Enter the elements of the matrix(row-wise)"+order+"X"+order);
for(int i=0;i<order;i++) {
for(int j=0;j<order;j++)
Mat[i][j]=in.nextInt();
}
}
public void DisplayInputMatrix() {
System.out.println("INPUT MATRIX:");
for(int i=0;i<order;i++) {
for(int j=0;j<order;j++)
System.out.print(Mat[i][j]+" ");
System.out.println();
}
}
private int order;
private int[][] Mat;
private int[][] Rotated_Mat;
private int Sum_of_Corner_Elements;
}
