2D阵列中每一行的总和

Question

我想知道如何在2D数组中打印每一行的总和 循环进行时对每一行求和的方法。

int sum  = 0;
int[][] nums = {{16, 29, 31, 65, 67},
    {28, 30, 39, 59, 70},
    {1, 42, 47, 64, 70}};

int count = 0;
for (int i = 0; i < nums.length; i++) {
    for (int j = 0; j < nums[i].length; j++) {
        sum+= nums[i][j];  
    }
    System.out.println(Arrays.toString(nums[i]));
    System.out.println(sum);
}

Answer 1

如果要打印每行的总和，则每次开始对新行求和时都需要将sum重置为0。

int[][] nums = {{16, 29, 31, 65, 67}, {28, 30, 39, 59, 70}, {1, 42, 47, 64, 70}};

for (int row = 0; row < nums.length; row++) {
    int sum = 0;
    for (int col = 0; col < nums[row].length; col++)
        sum += nums[row][col];
    System.out.println(Arrays.toString(nums[row]));
    System.out.println(sum);
}