Implement array using row major order and column major order in C++

Code

#include <iostream>
using namespace std;

int main()
{
    // column major order

    int a[3][4] = {{1, 2, 3, 4},
                   {5, 6, 7, 8},
                   {9, 10, 11, 12}};

    cout << "row major order" << endl;
    for (int i = 0; i < 3; i++)
    {
        for (int j = 0; j < 4; j++)
        {
            cout << a[i][j] << " ";
        }
        cout << endl;
    }

    cout << "column major order" << endl;
    for (int i = 0; i < 4; i++)
    {
        for (int j = 0; j < 3; j++)
        {
            cout << a[j][i] << " ";
        }
        cout << endl;
    }
}

Output