/*3)	Write a program to keep reading grades until a negative number 
is entered. Then the program prints the average of the grades entered.
*/

#include <iostream>
using namespace std;
int main()
{
	float grade, sum;
	int count;

	sum = 0;
	count = 0;

	cout << "Enter a grade: ";
	cin >> grade;
	while (grade >= 0)
	{
		count++;
		sum += grade;
		cout << "Enter a grade: ";
		cin >> grade;
	}
	if (count > 0)
	{
		cout << "\t\nThe average of the grades is: "
			<< sum / count << endl;
	}
	else
	{
		cout << "\n\aNo grades were entered.\n";
	}
	return 0;
}