06 ALGORITHM DEVELOPMENT AND CONTROL STATEMENTS

#include <iostream>
using namespace std;
int main()
{
	int A{ 0 }, B{ 0 }, C{ 0 }, D{ 0 },F{ 0 };
	int sum{ 0 };
	int cnt = 1;
	while(cnt<=10)
	{
		int score;
		cout << "점수를 입력하시오: ";
		cin >> score;
		if( (score > 100)||(score<0))
		{
			cout << "다시 입력하시오: ";
		}
		else
		{
			if (score >= 90)
			{
				A++;
			}
			else if (score >= 80)
			{
				B++;
			}
			else if (score >= 70)
			{
				C++;
			}
			else if (score >= 60)
			{
				D++;
			}
			else
			{
				F++;
			}
			cnt++;
			sum += score;
		}
	}
	cout << "A: " << A << endl;
	cout << "B: " << B << endl;
	cout << "C: " << C << endl;
	cout << "D: " << D << endl;
	cout << "F: " << F << endl;
	cout << "Avg: " << sum / 10;

}