How to do a desk check for a pattern in c++?

void prob2(int n)
{
    int c, c2, temp = n;
    for (c = 0; c <= (n + 1) / 2; c++)
    {
        for (c2 = 0; c2 < temp; c2++)
            cout << "  ";
        temp--;
        for (c2 = 0; c2 < 2 * c - 1; c2++)
        {
            cout << "* ";
        }
        cout << "\n";
    }
}

For example, if n=5, this code draws a triangle:

        *
      * * *
    * * * * *

My problem is that since I don't understand the procedure, I can't use the thought process behind this code to create the same triangle rotated to the right/flipped/etc.

    *
    * * 
    * * * 
    * *
    *

    *
  * *
* * *
  * *
    *