#include <iostream>
#include <math.h>

// This program computes the mean of a set of numbers that the user inputs.
// THe program keeps asking the user for numbers as long as the number
// is greater than or equal to zero.  A negative number means the list
// has ended.

int main()
{
	double x; // current value
	double total; // sum of the values
	double count; // number of values entered

	total = 0;  // initialization
	count = 0;
	do
	{
		cout << "Enter a number: ";
		cin >> x;
		if (x >= 0)
		{
			total += x;
			count++;
		}
	} 
	while  (x >= 0);

	cout << "The total is " << total << endl;
	if (count > 0)
	{
		cout << "The mean is " << total/count << endl;
	}
	else
	{
		cout << "Cannot compute the mean" << endl;
	}
}