#include <iostream>

int main(int argc, const char*[])
{

	double iChoice;

	// Prompt for user to input numbers.
	std::cout << "Enter a number with decimal points, or press 99 to exit." << std::endl;
	std::cout << "Your number: ";
	std::cin >> iChoice;

	int iNumberOfNumbersEntered = 0;
	double sum = 0;
	try
	{
		// Loop for executing input.
		while (iChoice != 99)
		{
			sum = sum + iChoice;
			std::cout << sum << std::endl;
			std::cout << "Enter another number with decimal points." << std::endl;
			std::cout << "Your number: ";
			std::cin >> iChoice;
			iNumberOfNumbersEntered++;
		}

		//Throw an exception if the number of numbers entered is 0 to avoid a divide by 0 error.
		if (iNumberOfNumbersEntered == 0)
			throw 0;
		// Throw an exception if the number is more than 10 digits long.
		if (iChoice <= -1000000000 || iChoice >= 1000000000)
			throw 1;

		// Average of numbers added.
		sum = sum / iNumberOfNumbersEntered;
		std::cout << "The average for the numbers that you entered is " << sum << "." << std::endl;
	}

	catch (...)
	{
		std::cout << "You must enter more than one number to calculate an average." << std::endl;
	}
	catch (...)
	{
		std::cout << "Enter a number in the range of 10 digits." << std::endl;
	}
	system("pause");
	return 0;
}