How can i make a vertical bar chart without arrays, using only loops?

I am beginner and still learning c++. So this was a question in my assignment to make a horizontal bar chart something like this,
Example:
Input:
   N1=>8 , N2=>6 , N3=>2 , N4=>10 , N5=>9
10       *
09       * *
08 *     * *
07 *     * *
06 * *   * *
05 * *   * *
04 * *   * *
03 * *   * *
02 * * * * *
01 * * * * *
   1 2 3 4 5

The columns are constant i.e 5 columns. This should be done without arrays as they are not allowed in the assignment and only using loops. It would be much appreciated if someone helps.