Statistics are often calculated with varying amounts of input data. Write a program that takes any number of non-negative integers as input, and outputs the max and average. A negative integer ends the input and is not included in the statistics. Assume the input contains at least one non-negative integer.

Output the average with two digits after the decimal point followed by a newline, which can be achieved as follows:
printf("%0.2lf\n", average);

Ex: When the input is:
15 20 0 3 -1
the output is:
20 9.50

Can someone please help me I've been stuck on this since yesterday