// Zeinalipour-Yazti Demetrios
// csyiazti
// cs10xx -
// Lab Sec#24, #29, #30
// lab4

/* Simple "Students Letter Notifier" 
   This program determines what students need to have a letter of notification 
   sent to them. The course is dependent on two tests. It initially asks the 
   user what are the maximum points for each of the two tests. Then for each
   student it asks the user to enter both scores. The program doesn't need to 
   know a'priori the number of students in the class. The user is given a way
   to terminate the input  student scores. As each set of test scores is 
   inputed the program displays if a student needs a notification letter and
   what type. Students get notification letters for the following reasons:
		Honors notification:     Grade of 95% or higher
		Warning notification:    D grade
		Failure notification:    F grade
 */
#include <iostream>
using namespace std;

void main()
{
	// declare variables
	char answer;      // user's answer to question if he wants to go on again
	int max_points1;  // maximum points for test1
	int max_points2;  // maximum points for test2
	int points1;      // user's points for test1
	int points2;      // user's points for test2
	int avg;        // user's average grade
	int counter = 0;  // counts number of users

	// greeting
	cout << "Students Letter Notifier by Demetris Zeinalipour - Lab 4 \n\n";

	// get the maximum test1 & test2 score
	cout << "What is the maximum score for Test #1? : ";
	cin >> max_points1;

	cout << "What is the maximum score for Test #2? : ";
	cin >> max_points2;

	// run the program for as many userstimes as the user wants			
	do 
	{	
		// increase user's counter
		counter++;

		cout << "\n\nEnter student's " << counter << " score for Test #1? : ";
		cin >> points1;

		cout << "Enter student's " << counter << " score for Test #2? : ";
		cin >> points2;
		
		// calculate user's average (do float division)
		avg = static_cast<float>(points1 + points2) /
			  static_cast<float>(max_points1 + max_points2);
		
		// scale average to 100 percentage range
		avg *= 100;
		
		cout << "Users average = " << avg << "\n";

		// decisions of letters are based on the following 3 conditions
		if (avg>=95)
		{ 
			cout << ">\tHonors notification:     Grade of 95% or higher!\n";
		}
		else if ((avg<=60) && (avg>=70))
		{
			cout << ">\tWarning notification:    D grade\n";
		}
		else if (avg<50)
		{
			cout << ">\tFailure notification:    F grade!\n";
		}
		else
		{
			cout << ">\tNo notification!\n";
		}	

		do // this loop ensures that the answer is y/n 
		{ cout << "\nDo you want to proceed to the next student? (y/n) : ";
		  cin >> answer;
		  if (answer!='y' && answer!='n') 
			{ cout << "Error! : Only (y/n) are valid entries!\n";  }
		} while (answer!='y' && answer!='n');

	} while (answer=='y');	

}