Hi All,
In exercise 33 you use man to get info on the function time with the command man 3 time. I run Fedora which has a different time function in man 3 time. In Fedora this gives you gawk manpage and you have to type man 3p time to get to the right manpage (for C).
I found this by doing man -k time.
Hopefully this helps someone having the same issue.
Guus.