Hollow Square

void printHollowSquare(int n)
{
    string topBottom = string(n, '*');
    string middle = '*' + string(n - 2, ' ') + '*';
    cout << topBottom << endl;
    for (int iRow = 1; iRow < n - 1; iRow++)
    {
        cout << middle << endl;
    }
    cout << topBottom << endl;
}