lassie% cc201 countdown.c
lassie% 

lassie% a.out
Engaging the auto-destruct sequence
Enter number of seconds to auto-destruct: 9
Counting down from 9
   9 seconds to auto-destruct
   8 seconds to auto-destruct
   7 seconds to auto-destruct
   6 seconds to auto-destruct
   5 seconds to auto-destruct
   4 seconds to auto-destruct
   3 seconds to auto-destruct
   2 seconds to auto-destruct
   1 seconds to auto-destruct
KABOOM!!!
lassie% 

lassie% a.out
Engaging the auto-destruct sequence
Enter number of seconds to auto-destruct: 17
Counting down from 17
   17 seconds to auto-destruct
   16 seconds to auto-destruct
   15 seconds to auto-destruct
   14 seconds to auto-destruct
   13 seconds to auto-destruct
   12 seconds to auto-destruct
   11 seconds to auto-destruct
   10 seconds to auto-destruct
   9 seconds to auto-destruct
   8 seconds to auto-destruct
   7 seconds to auto-destruct
   6 seconds to auto-destruct
   5 seconds to auto-destruct
   4 seconds to auto-destruct
   3 seconds to auto-destruct
   2 seconds to auto-destruct
   1 seconds to auto-destruct
KABOOM!!!
lassie%