<s>[INST] import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter first matrix");
        int r1 = scanner.nextInt();
        int c1 = scanner.nextInt();
        int[][] mat1 = new int [r1][c1];
        for (int i = 0; i <r1; i++) {
            for (int j = 0; j < c1; j++) {
                mat1[i][j]= scanner.nextInt();
            }
        }
        System.out.println("Enter second matrix");
        int r2 = scanner.nextInt();
        int c2 = scanner.nextInt();
        int[][] mat2 = new int [r2][c2];
        for (int i = 0; i <r2; i++) {
            for (int j = 0; j < c2; j++) {
                mat2[i][j]= scanner.nextInt();
            }
        }
        if (c1 == r2) {
            int[][] mat3 = new int[r1][c2];
            for (int i = 0; i < r1; i++) {
                for (int j = 0; j < c2; j++) {
                    for (int k = 0; k < c1; k++) {
                        mat3[i][j] += mat1[i][k] * mat2[k][j];
                    }
                }
            }
            for (int i = 0; i <r1; i++) {
                for (int j = 0; j < c2; j++) {
                    System.out.print(mat3[i][j]);
                    if (j < c2 - 1) System.out.print(" ");
                }
                System.out.println();
            }
        } else {
            System.out.println("Error! The matrices cannot be multiplied");
        }
    }
}
The code is written in Java and is used to multiply two matrices.

Here is how the input should look:

Enter first matrix
2 3
1 2 3
4 5 6
Enter second matrix
3 2
7 8
9 10
11 12
Multiplication result:
58 64
139 154
I have a couple of questions regarding the code:

1. The output isn't actually printing any matrix. The code to print the matrix is missing. Add it.

2. How would you suggest structuring this code into methods?[/INST]