我是真的很无语，外部函数写法就错，只能写里面是吧真的是无语!

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        int m = input.nextInt();
        int arr_1[][] = new int[105][105];
        int arr_2[][] = new int[105][105];
        //输入真两个数组
        inputarr(arr_1, m, n, input);
        inputarr(arr_2, m, n, input);

        //输出
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= m; j++) {
                System.out.printf("%d ", arr_1[i][j] + arr_2[i][j]);
            }
            System.out.println();
        }


    }

    //输入数组函数
    public static void inputarr(int arr[][], int n, int m, Scanner input) {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= m; j++) {
                arr[i][j] = input.nextInt();
            }
        }

    }
}