Two matrices are said to be equal if they have the same dimension and their corresponding elements are equal.

For example , the two matrices A and B given below are equal:

Matrix A                 Matrix B
1  2    3                     1   2     3
2   4   5                     2   4     5
3    5   6                    3     5    6
Design a class EqMat to check if tow matrices are equal or not. Assume that the two matrices have the same dimension.
Class name            :  EqMat
Data members:
a[][]                                        : to store integer elements
m, n                                        : to store the number of rows and columns
Member functions:
EqMat(int mm, int nn)             :  initialize the data members m=mm and n=nn
void readarray()                        :  to enter the elements in the array
int check(EqMat P, EqMat Q)  : checks if the parameterized objects P and Q are equal and returns 1 if true,otherwise returns 0.
void print()                                 : displays the array elements
Define the class and define main() to create objects and call the functions accordingly to enable the task.

Program:

import java.util.*;
class EqMat{
int a[][], m,n;
EqMat( int mm, int nn)
{
m=mm;
n=nn;
a=new int[m][n];
}
public void readarray()
{
Scanner sc=new Scanner(System.in);
System.out.println(“Enter the elements for the array:”);
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
a[i][j]=sc.nextInt();
}
}
}
public int check(EqMat P, EqMat Q)
{
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
if(P.a[i][j]!=Q.a[i][j])
return 0;
}
}
return 1;
}

public void print()
{
for(int i=0;i<m;i++)
{
for(int j=0;j<n;j++)
{
System.out.print(a[i][j]+”\t”);
}
System.out.println();
}
}
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
System.out.println(“Enter the row and column size for the array:”);
int a=sc.nextInt();
int b=sc.nextInt();
EqMat A =new EqMat(a,b);
EqMat B=new EqMat(a,b);
A.readarray();
B.readarray();
A.print();
System.out.println();
B.print();
if(A.check(A,B)==1)
System.out.println(“Both are equal matrix”);
else
System.out.println(“Both are unequal matrix”);
}
}

Output:

Enter the row and column size for the array:
3
3
Enter the elements for the array:
2
3
4
5
6
7
8
9
1
Enter the elements for the array:
2
3
4
5
6
7
8
9
2
First matrix
2 3 4
5 6 7
8 9 1

Second matrix
2 3 4
5 6 7
8 9 2
Both are unequal matrix