1.

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 is given below are equal:Matrix A123145356Matrix B123245356Design 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: parameterized 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»

import java.io.*; 

import java.util.Scanner; 

class EqMat{ 

private int a[][]; 

private static int m; 

private static int n; 

public EqMat(int mm, int nn) { 

m = mm; 

n = nn; 

a = newint[m][n]; 

} 

public void readArray( )throws IOException { 

Scanner sc = new Scanner(System.in); 

for(int i = 0; i < m; i++) { 

for(int j = 0; j < n; j++) { 

a[i][j] = sc.nextInt();

} 

} 

} 

public static boolean check(EqMat p, EqMat q) { 

boolean flag = true; 

for(int i = 0; i < m; i++) { 

for(int j = 0; j < n; j++) { 

if(p.a[i][j] !=q.a[i][j]) 

return false; 

} 

} 

return flag; 

} 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[ ]) throws IOException { 

Scanner sc = new Scanner(System.in); 

System.out.print(“Number of rows: ”); 

int rows = sc.nextInt(); 

System.out.print(“Number of columns: ”); 

int columns = sc.nextInt(); 

EqMat obj 1 = new EqMat(rows, columns); 

EqMat obj2 = new EqMat(rows, columns); 

System.out.println(“Enter elements for first matrix:”); 

obj1.readArray(); 

System.out.println(“Enter elements for second matrix:”); 

obj2.readArray(); 

System. out.println(“First Matrix:”); 

obj1.print(); 

System.out.println(“Second Matrix:”); 

obj2.print(); 

if(check(obj1, obj2)) 

System.out.println(“Both Matrices are Equal”); 

else 

System.out.println(“Matrices are not Equal”); 

} 

}


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