Define stubs for the functions get$\_$user$\_$num$()$ and compute$\_$avg$().$ Each stub should print "FIXME: Finish function$\_$name$()"$ followed by a newline, and should return $-1.$ Each stub must also contain the function's parameters.

Sample output with two calls to get$\_$user$\_$num$()$ and one call to compute$\_$avg$()$:

FIXME: Finish get$\_$user$\_$num$()$

FIXME: Finish get$\_$user$\_$num$()$

FIXME: Finish compute$\_$avg$()$

Avg: $-1$