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Java Exception Handling MCQ Test

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Java Code for Matrix Operations (Addition, Subtraction & Multiplication)

 



import java.util.Scanner; public class MatrixOperations { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); // Input matrix A System.out.println("Enter the number of rows and columns of matrix A:"); int rowsA = scanner.nextInt(); int colsA = scanner.nextInt(); int[][] matrixA = new int[rowsA][colsA]; System.out.println("Enter the elements of matrix A:"); for (int i = 0; i < rowsA; i++) { for (int j = 0; j < colsA; j++) { matrixA[i][j] = scanner.nextInt(); } } // Input matrix B System.out.println("Enter the number of rows and columns of matrix B:"); int rowsB = scanner.nextInt(); int colsB = scanner.nextInt(); int[][] matrixB = new int[rowsB][colsB]; System.out.println("Enter the elements of matrix B:"); for (int i = 0; i < rowsB; i++) { for (int j = 0; j < colsB; j++) { matrixB[i][j] = scanner.nextInt(); } } // Perform matrix addition if (rowsA == rowsB && colsA == colsB) { System.out.println("Matrix Addition:"); for (int i = 0; i < rowsA; i++) { for (int j = 0; j < colsA; j++) { System.out.print(matrixA[i][j] + matrixB[i][j] + "\t"); } System.out.println(); } } else { System.out.println("Matrix addition is not possible: dimensions mismatch."); } // Perform matrix subtraction if (rowsA == rowsB && colsA == colsB) { System.out.println("Matrix Subtraction:"); for (int i = 0; i < rowsA; i++) { for (int j = 0; j < colsA; j++) { System.out.print(matrixA[i][j] - matrixB[i][j] + "\t"); } System.out.println(); } } else { System.out.println("Matrix subtraction is not possible: dimensions mismatch."); } // Perform matrix multiplication if (colsA == rowsB) { System.out.println("Matrix Multiplication:"); int[][] resultMatrix = new int[rowsA][colsB]; for (int i = 0; i < rowsA; i++) { for (int j = 0; j < colsB; j++) { for (int k = 0; k < colsA; k++) { resultMatrix[i][j] += matrixA[i][k] * matrixB[k][j]; } System.out.print(resultMatrix[i][j] + "\t"); } System.out.println(); } } else { System.out.println("Matrix multiplication is not possible: columns of A must equal rows of B."); } scanner.close(); } }
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