编写一个程序，计算2D数组中每一行的元素之和，并将它们添加到整数数组中

Question

public static void main(String[] args) {
    int[][] a = {
        {1,1,2}, //sum = 4
        {3,1,2}, //sum = 6
        {3,5,3}, //sum = 11
        {0,1,2}  //sum = 3
    };
    int rowSums= 0;
    for (int i = 0; i < a.length; i++) {
        for (int j = 0; j a[i].length; j++) {
            System.out.print(i);
        }   
    }
}

我想弄清楚如何获取这些行并打印出来

Answer 1

 for (int i = 0; i < a.length; i++) {
    int sum = 0;
    for (int j = 0; j < a[i].length; j++) {
        sum += a[i][j];
    }
    System.out.println("Sum of row " + (i + 1) + " :: " + sum);
}

Answer 2

我想你想要这个：

    public static void main(String[] args) {
        int[][] a = {
                {1,1,2}, //sum = 4
                {3,1,2}, //sum = 6
                {3,5,3}, //sum = 11
                {0,1,2}  //sum = 3
        };
        int[] rowSumArray = new int[a.length];
        int rowSum = 0;
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[i].length; j++) {
                rowSum += a[i][j];
            }
            rowSumArray[i] = rowSum;
            rowSum = 0;
        }
        System.out.println(Arrays.toString(rowSumArray));
    }