Write a program that calculates the average of a stream of positive numbers. The user can enter as many positive numbers as they want, and they will indicate that they are finished by entering a negative number. For this program, treat zero as a positive number, i.e., zero counts as a number that goes into the average. Of course, the negative number should not be part of the average. You must use a function to read in the numbers, keep track of the running sum and count, compute the average, and return the average to the main() function. Note that you must use a loop to do this, as you don't know how many numbers the user will enter ahead of time.
So this is what I have so far but its not working out at all. I need some help!
using namespace std;
double do_calculation(double number);
int number=0,sum_numbers=0, total_number=0;
cout<<"Enter the number: ";
cout<<"The sum of the postive number is" << sum_numbers<< "and the average is equal to " << average<<endl;