#include <iostream>
using namespace std;

	int main () {
		int ip = -1;
		int tot = 0;
		int num = 0;
		int outstanding_scores = 0;
		int satisfactory_scores = 0;
		int unsatisfactory_scores= 0;
		char answer = 'Y';
		//bool valid = true;


	while ((answer=='Y') || (answer=='y')){

	cout << "Input score:";
	cin >> ip;

		if (cin.good()) {

if (ip >= 0) {
	if((ip>=90)&&(ip<=100)){
		outstanding_scores++;
		cout << "Outstanding score! ";
	}
	else if((ip>=60)&&(ip<=89)){
		satisfactory_scores++;
		cout << "Satisfactory score. ";
	}
	else if(ip<=59){
		unsatisfactory_scores++;
		cout << "Unsatisfactory score. ";
	}
	else {
		cout << "Invalid score. ";
	}
	tot = tot + ip;
		num++;
	cout << "Would you like to enter another exam?";
	cin >> answer;

	}
else {
	cout << "Integer is not greater than zero. ";
}
	}
		else {
			cout << "You did not enter an Integer. ";
		}
	}
	cout << "The average scores of these exams are " << tot/num;
	return 0;
	}