Question

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

				
					27      173     5

21      6       624

5       321      49

Design a class EqMat to check if two matrices are equal or not. Assume that the two matrices have the same dimension.

Some of the members of the class are given below:

Class name:EqMat
Data members/instance variables:
a[ ][ ]:to store integer elements

m:to store the number of rows

n:to store the number of columns

Member functions/methods:

EqMat(int mm, int nn): parameterised constructor to initialize the data members m = mm and n = nn

void readarray( ):to enter 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 EqMat giving details of the constructor( ), void readarray( ), int check(EqMat, EqMat) and void print( ). Define the main( ) function to create objects and call the functions accordingly to enable the task.

Share code with your friends

Code

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

        }
    }

    public static void main()
    {
        Scanner sc1=new Scanner(System.in);
        System.out.println("ENTER NUMBER OF ROWS OF MATRIX");
        int row=sc1.nextInt();
        System.out.println("ENTER NUMBER OF COLUMNS OF MATRIX");
        int col=sc1.nextInt();
        EqMat ob1=new EqMat(row,col) ;
        EqMat ob2=new EqMat(row,col) ;
        System.out.println("enter nos for the 1st Matrix");
        ob1.readarray();
        System.out.println("enter nos for the 2nd Matrix");
        ob2.readarray();
        if(ob1.check(ob1,ob2)==1)
        { 
            System.out.println("Equal Matrix") ;
            ob1.print();
            ob2.print();
        }
        else
        {
            System.out.println("not equal");
        }
    }
}