// Kevin Covington
// Lab 7

#include <iostream>
#include <iomanip>
using namespace std;

float calculation(float grades[], int);

int main()

{
	char name[5][2];
	char letter[6] = {'A', 'B', 'C', 'D', 'F', '\0'};
	const int numStudents = 5;
	const int numScores = 4;
	float total = 0;
	float average;
	float scores1[numScores];
	float scores2[numScores];
	float scores3[numScores];
	float scores4[numScores];
	float scores5[numScores];
	int count;

	// First student

	cout <<"Enter the test scores for the first student" << endl;
	for (int count = 0; count < numScores; count++)
	{
		cout << "The grade is " << (count+1) << ": ";
		cin >> scores1[count];
		while (scores1[count] < 0 || scores1[count] > 100);
		{
			cout << scores1[count] << " is invalid grade.\n";
			cout << "Enter the grade again. \n";
			cin >> scores1[count];
		}
	}
	average = calculation(scores1, numScores);
		if (average >= 90)
		{
			cout << "The average is " << average << " " << letter[0] << endl;
		}
		else if (average >= 80)
		{
			cout << "The average is " << average << " " << letter[1] << endl;
		}
		else if (average >= 70)
		{
			cout << "The average is " << average << " " << letter[3] << endl;
		}
		else if (average >= 60)
		{
			cout << "The average is " << average << " " << letter[4] << endl;
		}
		else 
		{
			cout << "The average is " << average << " " << letter[5] << endl;
		}

		// second student

	cout <<"Enter the test scores for the second student" << endl;
	for (int count = 0; count < numScores; count++)
	{
		cout << "The grade is " << (count+1) << ": ";
		cin >> scores2[count];
		while (scores2[count] < 0 || scores2[count] > 100)
		{
			cout << scores2[count] << " is invalid grade.\n";
			cout << "Enter the grade again. \n";
			cin >> scores2[count];
		}
	}
	average = calculation(scores2, numScores);
	if (average >= 90)
		{
			cout << "The average is " << average << " " << letter[0] << endl;
		}
		else if (average >= 80)
		{
			cout << "The average is " << average << " " << letter[1] << endl;
		}
		else if (average >= 70)
		{
			cout << "The average is " << average << " " << letter[3] << endl;
		}
		else if (average >= 60)
		{
			cout << "The average is " << average << " " << letter[4] << endl;
		}
		else 
		{
			cout << "The average is " << average << " " << letter[5] << endl;
		}

		// Third student

		cout <<"Enter the test scores for the third student" << endl;
	for (int count = 0; count < numScores; count++)
	{
		cout << "The grade is " << (count+1) << ": ";
		cin >> scores3[count];
		while (scores3[count] < 0 || scores3[count] > 100)
		{
			cout << scores3[count] << " is invalid grade.\n";
			cout << "Enter the grade again. \n";
			cin >> scores3[count];
		}
	}
	average = calculation(scores3, numScores);
	if (average >= 90)
		{
			cout << "The average is " << average << " " << letter[0] << endl;
		}
		else if (average >= 80)
		{
			cout << "The average is " << average << " " << letter[1] << endl;
		}
		else if (average >= 70)
		{
			cout << "The average is " << average << " " << letter[3] << endl;
		}
		else if (average >= 60)
		{
			cout << "The average is " << average << " " << letter[4] << endl;
		}
		else 
		{
			cout << "The average is " << average << " " << letter[5] << endl;
		}

		// Fourth Student

		cout <<"Enter the test scores for the fourth student" << endl;
	for (int count = 0; count < numScores; count++)
	{
		cout << "The grade is " << (count+1) << ": ";
		cin >> scores4[count];
		while (scores4[count] < 0 || scores2[count] > 100)
		{
			cout << scores4[count] << " is invalid grade.\n";
			cout << "Enter the grade again. \n";
			cin >> scores4[count];
		}
	}
	average = calculation(scores4, numScores);
	if (average >= 90)
		{
			cout << "The average is " << average << " " << letter[0] << endl;
		}
		else if (average >= 80)
		{
			cout << "The average is " << average << " " << letter[1] << endl;
		}
		else if (average >= 70)
		{
			cout << "The average is " << average << " " << letter[3] << endl;
		}
		else if (average >= 60)
		{
			cout << "The average is " << average << " " << letter[4] << endl;
		}
		else 
		{
			cout << "The average is " << average << " " << letter[5] << endl;
		}

		// Fifth student

		cout <<"Enter the test scores for the fifth student" << endl;
	for (int count = 0; count < numScores; count++)
	{
		cout << "The grade is " << (count+1) << ": ";
		cin >> scores5[count];
		while (scores5[count] < 0 || scores2[count] > 100)
		{
			cout << scores5[count] << " is invalid grade.\n";
			cout << "Enter the grade again. \n";
			cin >> scores5[count];
		}
	}
	average = calculation(scores5, numScores);
	if (average >= 90)
		{
			cout << "The average is " << average << " " << letter[0] << endl;
		}
		else if (average >= 80)
		{
			cout << "The average is " << average << " " << letter[1] << endl;
		}
		else if (average >= 70)
		{
			cout << "The average is " << average << " " << letter[3] << endl;
		}
		else if (average >= 60)
		{
			cout << "The average is " << average << " " << letter[4] << endl;
		}
		else 
		{
			cout << "The average is " << average << " " << letter[5] << endl;
		}
			

// }
// cout << endl;
return 0;
}

		float calculation (float grades[], int num)
		{
			float total = 0, average;
			for (int count = 0; count < num; count++)
				total += grades[count];
			
			average = total / num;
			cout << fixed << showpoint << setprecision(2);
			cout << "The total is " << total << endl;

			return average;
		}
		
			
		

	

  for (int count = 0; count < numScores; count++)
  {
    cout << "The grade is " << (count+1) << ": ";
    cin >> scores1[count];
    while (scores1[count] < 0 || scores1[count] > 100); // <--- the semi-colon shouldn't be here
    {
      cout << scores1[count] << " is invalid grade.\n";
      cout << "Enter the grade again. \n";
      cin >> scores1[count];
    }
  }