How can I get the list into a 2D array?

#include <iostream>
#include <vector>
#include <cstdlib>
#include <ctime>

using namespace std;
// Returns true if the item is in the list, otherwise false
bool checkUnique(std::vector<int> &list, int value)
{
    for (int i = 0; i < list.size(); ++i)
    {
        if (list.at(i) == value)
        {
            return true;
        }
    }

    return false;
}

// min inclusive, max exclusive
// make sure to set a new seed before using to help make results more random. (std::srand)
int randomInt(int min, int max)
{
    return rand() % (max - min) + min;
}

int magicSquare()
{

}

int main()
{
    vector<int> list;
    srand(time(0)); // gets random number
    //int arr[3][3];

    while (list.size() < 9) // while the list size is less than 9 it continues to repeat
    {
        int num = randomInt(1, 10); // random number 1 min 10 max

        if (!checkUnique(list, num)) // if the unique is not equal to the list or number than list gets pushed b
        {
            list.push_back(num); // increase the container size by one if the if statement is false
        }
    }

    for (int k = 0; k < list.size(); ++k) // gets the row
    {
        for (int j = 0; j < list.size(); ++j) // gets the column
        {

        cout << list.at(k)(j) << endl; // outputs the row and column
        }
    }

    return 0;
}