Let me add to the confusion (but it's really not so complicated):

A: If you want "random" behavior: do nothing.  The random number generator is seeded with the time of day.

B: If you want repeatable random numbers (i.e., you want to get the same sequence of numbers each time you run the program), then call srand() with the number of your choosing.

... and shoot me if I've gotten that wrong.  I haven't loaded ChucK onto my new laptop to verify this.