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

using namespace std;
const int size = 10;

bool read_input(ifstream&fin, string& lastName, string& firstname, int greades[]);
double calcualtion_average(int grades[]);
void write_output(ofstream& fout, string latName, string firstName, int grades[], double average);


int main()
{
	ifstream fin;
	ofstream fout;
	string lastName, firstName;
	int grades[size];
	double average;

	fin.open("grades_input.txt");
	if (fin.fail())

	{
		cout << "Input file opening failed.\n";
		exit(1);


	}

	fout.open("grades_output.txt");
	if (fout.fail())
	{
		cout << "Output files opening failed\n";
		exit(2);
	}

	while (read_input(fin, lastName, firstName, grades))
	{
		average = calculate_average(grades);

		write_output(fout, lastName, firstName, grades,average);

	}
	fin.close();
	fout.close();

	return 0;
}


bool read_input(ifstream& fin, string& lastName, string& firstName, int grades[])
{

	if 
	( fin >> lastName )
{
	fin >> firstName;
		for (int i = 0; i < size; i++)
			fin >> grades[i];
		
		return true;
}
	return false;
}
double calculate_average(int grades[])
{
	double total = 0;

	for (int i = 0; i < size; i++);
	total += grades[i];
	return total / size;

}
void write_output (ofstream& fout, string lastName, string firstName, int grades[], double average)
{
	fout << lastName << " " << firstName;
	
	for (int i = 0; i < size; i++)
		fout << " " << grades[i];

		fout << "" << average << endl;
}