#include <iostream>
#include <fstream>
#include <string>
using namespace std;

//We are creating a new
// "super" type of variable
//made up of many other types
//of variables
class student
{
public:
	string fname;
	string lname;
	int id;
	double exam1;
	double exam2;
	double exam3;

	double average;
};

int main()
{
	//step 0: open the input file
	ifstream infile("studentGrades.txt");

	//step 1: read in the number of students, numStudents
	int numStudents;
	infile >> numStudents;

	//step 2: create an array of students
	//student A[numStudents]; //can't use static array declartion
	student* studentArray = new student[numStudents]; //dynamic array allocation

	//step 3: read in the students from the file into the array, calculate average
	for (int i = 0; i < numStudents; i++)
	{
		studentArray[i] = readOneStudentFromFile(infile);
		studentArray[i].average = computeAverage(studentArray[i]);
	}

	//step 4: sort stucents by average
	selectionSort(studentArray, 0, numStudents - 1);

	//step 5: output students to output file.
	ofstream outfile("sortedGradeReport.txt");
	for (int i = 0; i < numStudents; i++)
	{
		writeOneStudentToFile(studentArray[i], outfile);
	}


	return 0;
}