C++ simple looping HW question?

Question

if series of numbers are entered by the user(don't know how many), How do I use a loop to figure out the average,largest,and smalles number?

I know how to do it with if and else, but I have no idea how to do it without knowing how many numbers user enters.

Thanks ahead of time for any help.

Answer 1

have a running number inside the loop to keep track of how many times it keeps going in
to exit out of the loop,
have your program look for a null entry. zero is not a null entry

Answer 2

complicated matter. search onto search engines like google. just that will help!