56. Matrix Operations. import java.util.Scanner; public c | Advance Java 👨‍💻

56. Matrix Operations.

import java.util.Scanner;

public class Matrices {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print("Enter number of rows: ");
int rows = scanner.nextInt();

System.out.print("Enter number of columns: ");
int columns = scanner.nextInt();

System.out.println();
System.out.println("Enter first matrix");
int[][] a = readMatrix(rows, columns);

System.out.println();
System.out.println("Enter second matrix");
int[][] b = readMatrix(rows, columns);

int[][] sum = add(a, b);
int[][] difference1 = subtract(a, b);
int[][] difference2 = subtract(b, a);

System.out.println();
System.out.println("A + B =");
printMatrix(sum);

System.out.println();
System.out.println("A - B =");
printMatrix(difference1);

System.out.println();
System.out.println("B - A =");
printMatrix(difference2);
}

public static int[][] readMatrix(int rows, int columns) {

int[][] result = new int[rows][columns];
Scanner s = new Scanner(System.in);

for (int i = 0; i < rows; i++) {

for (int j = 0; j < columns; j++) {

result[i][j] = s.nextInt();

}
}
return result;
}

public static int[][] add(int[][] a, int[][] b) {

int rows = a.length;
int columns = a[0].length;
int[][] result = new int[rows][columns];

for (int i = 0; i < rows; i++) {

for (int j = 0; j < columns; j++) {

result[i][j] = a[i][j] + b[i][j];

}
}
return result;
}

public static int[][] subtract(int[][] a, int[][] b) {

int rows = a.length;
int columns = a[0].length;
int[][] result = new int[rows][columns];

for (int i = 0; i < rows; i++) {

for (int j = 0; j < columns; j++) {

result[i][j] = a[i][j] - b[i][j];

}
}
return result;
}

public static void printMatrix(int[][] matrix) {

int rows = matrix.length;
int columns = matrix[0].length;

for (int i = 0; i < rows; i++) {

for (int j = 0; j < columns; j++) {

System.out.print(matrix[i][j] + " ");

}
System.out.println();
}
}
}

@java_codings