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Java

Posted by tiago goncalves
tiago goncalves
1,912 Points

Lets find and fix the BUG... I need you help...

the program sums the major diagonal of some n dimension matrix. I noticed that even if I put dimension as 4, and then insert the values of row 0 i can put 30 n number eventhough the program will not use them. can I add an If() somehow to limit the number, when asked for the values of row 0, for example?

import java.util.Scanner;

public class SumMajorDiagonal {

public static double sumMajorDiagonal(double[][] m){
    int n = m.length;
    int i=0;
    int j=0;

    double sum = 0;

    while(i < n && j < n){
        sum += m[i][j];
        i++;
        j++;
    }

    return sum;
}

public static void main(String args[]){

    Scanner scanner = new Scanner(System.in);
    System.out.print("Enter dimension n of nxn matrix:");
    int n = Integer.parseInt(scanner.nextLine());

    double[][] mat = new double[n][n];

    for(int i=0; i<n; i++){
        System.out.print("Enter row " + i + ":");
        String[] row = scanner.nextLine().split(" ");

        for(int j=0; j<n; j++){
            mat[i][j] = Double.parseDouble(row[j]);
        }
    }


    System.out.print(sumMajorDiagonal(mat));

}

}

1 Answer

tiago goncalves
tiago goncalves
1,912 Points
tiago goncalves
tiago goncalves
1,912 Points

Thank you for your time