2D Arrays Pt 2

[SGTech08]

a)

public void repopulate() {
// iterate through each row of the grid
for (int row = 0; row < grid.length; row++) {
// iterate through each column of the current row
for (int col = 0; col < grid[row].length; col++) {
// initialize a random value that meets the criteria
int value;
do {
// generate a random value between 1 and MAX (inclusive)
value = (int) (Math.random() * MAX) + 1;
} while (value % 10 != 0 || value % 100 == 0); // ensure value is divisible by 10 but not 100

        // assign the valid value to the current grid element
        grid[row][col] = value;
    }
}

}

b)

public int countAscendingCols() {
// initialize a counter to track columns in ascending order
int ascendingCount = 0;

// iterate through each column in the grid
for (int col = 0; col < grid[0].length; col++) {
    boolean isAscending = true;

    // check if the current column is in ascending order
    for (int row = 1; row < grid.length; row++) {
        if (grid[row][col] < grid[row - 1][col]) {
            isAscending = false; // set to false if a descending value is found
        }
    }

    // increment the counter if the column is in ascending order
    if (isAscending) {
        ascendingCount++;
    }
}

// return the total number of ascending columns
return ascendingCount;

}