Define stubs for the functions called by the below main(). Each stub should print "FIXME: Finish FunctionName()" followed by a newline, and should return -1. Example output:
FIXME: Finish GetUserNum()
FIXME: Finish GetUserNum()
FIXME: Finish ComputeAvg()
Avg: -1
What is it that you have trouble with? When they say stub I think they just mean incomplete function. After you have implemented the functions as described you should be able to compile the program but it will not make a useful program to run, but as an exercise it's probably okay.