# include <fstream>
# include <iostream>
# include <cstdlib>

int main()
{
	using namespace std;

	ifstream input_file;

	double number;
	int denominator = 0;
	double add=0;
	double average;

	input_file.open("fin.txt");
	if (input_file.fail())
	{
		cout << "The file fin.txt did not open." << endl;
		exit(1);
	}

	while (!input_file.eof())
	{
		input_file >> number;
		add = add + number;
		denominator = denominator + 1;
	}
	average = add / denominator;
	cout << "The average of the " << denominator << " numbers is " << average << "."<< endl;
	return 0;
}