计算此二维数组的平均值

Question

What I'm now looking for is a way to print the average of second row of this code.

import java.util.Scanner;
public class MojaLoi{
public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    int [][] a = new int[6][6];

    for(int i=0; i<a.length; i++){
        for(int j=0; j<a[i].length; j++){
            a[i][j] = sc.nextInt();
        }
    }
    for(int i=0; i<a.length; i++){
        for(int j=0; j<a[i].length; j++){
            System.out.print(a[i][j]+" ");
        }
        System.out.println();
    }
}

Any reply greatly appreciated.

Answer 1

To calculate average of just the second row use:

float sum = 0;
for(int j=0; j<a[0].length; j++){
    sum += a[1][j];   // i = 1 for second row
}
float average = sum / a[0].length;
System.out.println(average);