Hack: Create method that sets all elements in array to n

void setArray(int[] arr, int n) {
    // your code here
}

int[] array = new int[10];
setArray(array, 10);

for (int i = 0; i < array.length; i++) {
    array[i] = 10;
    System.out.println(array[i]);
}

// Should print all 10s when working properly

Hack: Write an array to find the average of an array

//Example finding the max in an array. 

//Finds the maximum in an array
public static int average(int[] array) {
    // put your code here
    int total = 0;
    
    for (int i = 0; i < array.length; i++) {
        total += array[i];
    }
    return total / array.length;

    
}

//tester array
int[] test = {3, 5, 7, 2, 10};

//returns 10
System.out.println(average(test));

Hack: Find the average number of a diagonal in a 2d array

For example, here find the average of the bolded #s
1 2 3 4
5 6 7 8
9 1 2 3

public static int averageDiagonal (int[][] arr) {
    int total = 0;
    int count = 0;
    for (int row = 0; row < arr.length; row++){
        
        for (int col = 0; col < arr[row].length; col++){
            if (row == col) {
                total += arr[row][col];
                count ++;
            }
            
        }
    }
    return total / count;
}

int[][] arr = {
    {1,2,3,4,5,6},
    {7,8,9,10,11,12},
    {0,1,2,3,4,5},
    {10,11,12,13,14,15},
    {15,16,17,18,19,20}
};

System.out.println(averageDiagonal(arr));

8

public class HighSum {
    public static int highestSum(int[][] arr) {
        int maxSum = -1; // initialize with -1, since all sums are non-negative
        int rowSum = 0;
        int colSum = 0;
        
        for (int i = 0; i < arr.length; i++) {
            rowSum = 0;
            colSum = 0;
            for (int j = 0; j < arr[i].length; j++) {
                rowSum += arr[i][j];
                colSum += arr[j][i];
            }
            if (rowSum > maxSum) {
                maxSum = rowSum;
            }
            if (colSum > maxSum) {
                maxSum = colSum;
            }
        }
        return maxSum;
    }
    public static void main(String[] args) {
        int[][] arr = {
            {12,5,19},
            {2,26,11},
            {34,8,16}
        };
        System.out.print(highestSum(arr));
    }
}

HighSum.main(null);

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