#include <iostream>
using namespace std;

int main()
{
	int num1, num2, input1, input2, subtotal, average, total, count;
    input1 = 0;
	input2 = 0;
	num1 = 0;
	num2 = 0;
	subtotal = 0;
	total = 0;
	count = 0;


    cout << "Enter integers for start and finish in pairs until start > finish";
    cout << ", which terminates the program or when EOF or an invalid input";
    cout << "has been made.\n\n";
	while (input1 <= input2)
	{
		cout << "Enter start and finish integers -> ";
		cin >> input1 >> input2;
        count++;
        if (cin.eof())
        {
           cout << "\nEOF...\n";
           average = (total / (count - 1));
           cout << "\nTOTAL = " << total << endl;
           cout << "AVERAGE = " << average << endl << endl;
           break;
        }
        if (cin.fail())
        {
           cout << "\nFAIL...\n";
           average = (total / (count - 1));
           cout << "\nTOTAL = " << total << endl;
           cout << "AVERAGE = " << average << endl << endl;
           break;
        }
		num1 = input1;
		num2 = input2;
		while (num1 <= num2)
		{
			subtotal = (num1 * num1);
			total = subtotal + total;
			num1++;
		}
	}
	if (input1 > input2)
	{
       average = (total / (count - 1));
       cout << "\nTOTAL = " << total << endl;
       cout << "AVERAGE = " << average << endl << endl;
    }
    system("pause");

	return 0;
}