Chapter 9 comment

Here is my (single) comment on what you submitted for Chapter 9.

ex9.1: actually, if I try your code for item (a) a larger number of times, I notice a small fraction of times where the order of printout is inverted. I'm not quite sure how many times you tried, but to me this is sufficient. (BTW I'm not sure why commented out all the actual code in your main() program??)

Other than that I'm happy with your code. Feel free to close this issue.