Write a program to declare a square matrix A[][] of order M×M where ‘M’ is the number of rows and the number of rows and the number of columns, such that M must be greater than 2 and less 10. Accept the value 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:
- Display the original matrix.
Rotate the matrix 90áµ’ 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 3Find 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 elements = 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 elements = 18
Example 3
INPUT: M=14
OUTPUT:
SIZE OUT OF RANGE
import java.util.*;
class ISCPrac2015Q02
{
public static void main(String args[])
throws InputMismatchException{
Scanner scan=new Scanner(System.in);
System.out.println("Enter the number of rows (greater than 2 and less than 10) for the square matrix : ");
int m=scan.nextInt();
if(m<=2 || m>=10)
System.out.println("SIZE OUT OF RANGE");
else{
int a[][]=new int[m][m];
int b[] = new int[m*m];
int i,j,ctr,c;
System.out.println("Enter "+(m*m)+" numbers for the matrix: ");
for(i=0;i < m;i++){
for(j=0;j < m;j++){
a[i][j] = scan.nextInt();
}//loop j
}//loop i
//Index counter for 1-d array b[]
ctr = 0;
//Display the original matrix and store elements of
//2-d array a[] into 1-d array b[]
System.out.println("ORIGINAL MATRIX");
for(i=0;i < m;i++){
for(j=0;j < m;j++){
System.out.print(a[i][j] + " ");
b[ctr++] = a[i][j];
}//loop j
System.out.println();
}//loop i
c = m-1;
ctr = 0;
do{
for(i=0; i < m; i++)
a[i][c] = b[ctr++];
c--;
}while(c >= 0);
System.out.println("MATRIX AFTER ROTATION");
for(i=0;i < m;i++){
for(j=0;j < m;j++){
System.out.print(a[i][j] + " ");
}//loop j
System.out.println();
}//loop i
System.out.println("Sum of the corner elements="+(a[0][0] + a[0][m-1] + a[m-1][0] + a[m-1][m-1]));
}//else
}//end of main
}//end of class
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