// vector::push_back
#include <iostream>
#include <vector>

int main()
{
	std::vector<int> num;
	int thing;
	int sum = 0;
	int cnt = 0;

	std::cout << "Please enter some integers (enter 0 to end):\n";

	do {
		std::cin >> thing;
		cnt++;
		num.push_back(thing);
	} while (thing);
	for (auto i : num) {
		sum += i;
	}

	std::cout << "The mean is " << sum / cnt << std::endl;
	std::cin.get();

	return 0;
}