题解 | #二维数组求和#

public class Main {
    public static void main(String[] args) {
        int[][]  arr = {{11,33,55},{22,44,66,88},{131,214,315,146},{928,827,726,625},{424,525}};
        int sum=add(arr);
        System.out.println(sum);
    }

    public static int add(int[][] arr) {
        int sum=0;

        //write your code here......
        int[] list;
        for(int[] is : arr){
            list = is;
            for(int i : list){
                sum += i;
            }
        }
        return sum;
    }
}

转成一维数组，然后逐个取出，再进行sum相加