Question

Two matrices are said to be equal if they have the same dimension and their corresponding elements are equal. 10 For example the two matrices A and B given below are equal :

Matrix A

1	2	3
2	4	5
3	5	6

Matrix B

1	2	3
2	4	5
3	5	6

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 initialise 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.

Answer 1

import java. io. *;

class EqMat

{

int a [ ] [ ];

int m, n;

EqMat (int mm, int nn)

{

m = mm;

n = nn;

a = new int[m][n];

}

void readarray ( )

{

int i, j;

BufferedReader br = new BufferedReader (new InputStreamReader (System. in)); 

System. out. println ("Enter" + m + n + "values"); for (i = 0; i < m; i + +)

{

for (j = 0; j < n; j ++)

a [i] [j] = Integer. parseInt (br. readLine ());

}

}

int check (EqMat P, EqMat Q)

{

int i, j;

for (i = 0; i < m; i ++)

{

for (j = 0; j < n; j++)

if (P. a [i] [j] ! = Q. a [i] [j]) return (0);

}

return (1);

}

void print ( )

{

int i, j;

for (i = 0; i < m; i ++)

{

for (j = 0; j < n; j ++) System. out. print (a [i] [j]);

system. out. println ( ) ;

}

}

public static void main (String args [ ])

{

BufferedReader br = new BufferedReader (new InputStreamReader (System. in));

system. out. println ("Enter no. of rows of matrix");

int row = Integer. parseInt (br. readLine ( ));

system . out. println ("Enter no. of Columns of matrix ");

int col = Integer. parseInt (br. readLine ( )); 

EqMat Ob1 = new EqMat (row, col);

Ob1. readarray ( );

Ob1. print ( );

EqMat Ob2 = new EqMat(row, col);

Ob2. readarray ( );

Ob2. print ( );

EqMat Ob3 = new EqMat (row, col);

if (Ob3. check (Ob1, Ob2) = = 1)

system. out. println (" Matrices are equal"); 

else

system. out. println (" Matrices are not equal");

}

}