Thread: Sum elements column by column

Hi!
I have to create this program, and it's working fine, but for some reason I cannot comprehend, it doesn't return doubles
If I try to change:

double total = 0;

the return type is still incorrect.

Any help will be appreciated
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~

import java.util.Scanner;
public class SumElementsByColumn {
public static void main(String[] args) {
double [][] matrix = new double[3][4];

Scanner input = new Scanner(System.in);
System.out.println("Enter " + matrix.length + " rows and " +
matrix[0].length + " columns: ");
for (int row = 0; row < matrix.length; row++){
for ( int column = 0; column < matrix[row].length; column++){
matrix[row][column] = input.nextDouble();
}
}
sumColumn(matrix,0);
}
public static int sumColumn(double[][] m, int columnIndex){
int total = 0;
for ( int column = 0; column <= columnIndex; column++){
total = 0;
for (int row = 0; row < m.length; row++){
total += m[row][column];
}
System.out.println(total);
}
return total;
}

}

Originally Posted by theoriginalanomaly

You are accumulating into an int. Total is an int, and the methods return type is int.

In other words, change the return type to double, and the total into double.

I saw it earlier today!
Such a silly mistake!!
Thanks a lot though! n_n