Change value in 2D array

[HPexpress]

Hello,

I am having trouble doing two things to my array.
1) change the values of column 2. multiply by 2

2) change the value of row 7, col 6 to value 10.23.

basically having trouble with changing data in an array lol Any help would be appreciated!

#include <iostream>
#include <iomanip>

using namespace std;
const int MAX_ROW = 10;
const int MAX_COL = 8;

int main()
{
// initialize variables and set array size;
int array [MAX_ROW] [MAX_COL];
int row, col, max_value_row=0, max_value_col = 0;



for (row =0; row < MAX_ROW; row++)
{
    for (col = 0; col < MAX_COL; col ++)
        array[row][col] = row * col;
}

// Change data in column 2
for (row=0; row < MAX_ROW; row++)
    array[row][col] << row * 2;


// Change row 7, column 6 to 12.23
cout << fixed << showpoint << setprecision(2);
array[7][6] = static_cast<double> (10.23);

// Print 2D array
for (row =0; row < MAX_ROW; row++)
{
    for(col = 0; col < MAX_COL; col++)
        cout << setw(5) << array [row][col]<<" ";

    cout << endl;
}

// Find largest value

for (row =0; row < MAX_ROW; row++)
{
    max_value_row = array [row][0];

    for (col = 1; col < MAX_COL; col++)
    {
        if (max_value_row < array [row][col])
            max_value_row = array[row][col];
    }

}

for (col =0; col< MAX_COL; col++)
{
    max_value_col = array[0][col];
    for (row =1; row < MAX_ROW; row++)
        if (max_value_col < array [row][col])
            max_value_col = array [row][col];
}

if (max_value_row > max_value_col)
    cout << max_value_row << " is the largest value." << endl;
else if (max_value_row < max_value_col)
    cout << max_value_col << " is the largest value." << endl;
else
    cout << max_value_row << " is the largest value. ";

    return 0;
}

[Stewbond]

1.
Change this:

// Change data in column 2
for (row=0; row < MAX_ROW; row++)
    array[row][col] << row * 2;

To This:

// Change data in column 2
for (row=0, col = 2; row < MAX_ROW; row++) // Remember to specify the column
    array[row][col] *= 2; // The << operator is not useful here. 

2.
Change this:
int array [MAX_ROW] [MAX_COL]; and this:

 // Change row 7, column 6 to 12.23
cout << fixed << showpoint << setprecision(2);
array[7][6] = static_cast<double> (10.23);

To this:
double array [MAX_ROW] [MAX_COL]; and this:

// Change row 7, column 6 to 12.23
array[7][6] = 10.23;

[HPexpress]

Thank you very much for the assistance! I kept trying different ways to change data to a double for 10.23 but neglected that array was set as int values! :)