Question

Java prompt:

Write a program that receives a 10 by 4 table (40 integers) from the user, all in one line, and fills a two-dimensional array (10 by 4) based on the input (row by row). Then prints the average of every row, as "Row [i] average: [calculated average for row i]" Finally, prints the average of every column, as "Column [j] average: [calculated average for row j]"

Answer 1

//Main.java
import java.util.Scanner;
public class Main{
  public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    System.out.println("Enter 40 integers: ");
    int arr[][] = new int[10][4];

    for(int i = 0;i<arr.length;i++){
      for(int j = 0;j<arr[i].length;j++){
        arr[i][j] = scanner.nextInt();
      }
    }

    int sum = 0;
    for(int i = 0;i<arr.length;i++){
      sum = 0;
      for(int j = 0;j<arr[i].length;j++){
        sum += arr[i][j];
      }
      System.out.println("Row ["+(i+1)+"] average: "+(1.0*sum/arr[i].length));
    }

    for(int j = 0;j<arr[0].length;j++){
      sum = 0;
      for(int i = 0;i<arr.length;i++){
        sum += arr[i][j];
      }
      System.out.println("Column ["+(j+1)+"] average: "+(1.0*sum/arr.length));
    }

  }
}