Code lab 01

double GetAverageScore(double** myArray, int numStudents, int examSlot)
{
	double scoreCollection = 0.0;
	//calculate average
	for (int i = 0; i < numStudents; ++i)
	{
		scoreCollection = scoreCollection + myArray[i][examSlot];
}
	double averageScore = scoreCollection / numStudents;
	return averageScore;
}

string GetLetterGrades(double** myArray, int i, int j)
{
	string letterGrade;
	double averageScore = 0.0;

	if (myArray[i][j] <= averageScore - 5 || myArray[i][j] >= averageScore + 5)
	{
		letterGrade = "(C)";
	}
	if (myArray[i][j] > averageScore + 5 && myArray[i][j] < averageScore + 15)
	{
		letterGrade = "(B)";
	}
	if (myArray[i][j] < averageScore - 5 && myArray[i][j] > averageScore - 15)
	{
		letterGrade = "(D)";
	}
	if (myArray[i][j] >= averageScore + 15)
	{
		letterGrade = "(A)";
	}
	if (myArray[i][j] <= averageScore - 15)
	{
		letterGrade = "(E)";
	}
	return letterGrade;
}
string ReturnNumberGrade(double** myArray, int numStudents, int numExams)
{
	string letterGrade;
	int numberA = 0;
	int numberB = 0;
	int numberC = 0;
	int numberD = 0;
	int numberE = 0;
	for (int i = 0; i < numStudents; ++i)
	{
		for (int j = 0; j < numExams; ++j) {
			if (GetLetterGrades(myArray, i, j) == "(A)")
			{
				numberA = numberA + 1;
			}
			if (GetLetterGrades(myArray, i, j) == "(B)")
			{
				numberB = numberB + 1;
			}
			if (GetLetterGrades(myArray, i, j) == "(C)")
			{
				numberC = numberC + 1;
			}
			if (GetLetterGrades(myArray, i, j) == "(D)")
			{
				numberD = numberD + 1;
			}
			if (GetLetterGrades(myArray, i, j) == "(E)")
			{
				numberE = numberE + 1;
			}
		}
	}
	ostringstream gradeLine;
	gradeLine << numberA << "(A)" << numberB << "(B)" + numberC << "(C)" << numberD << "(D)" << numberE << "(E)";
	return gradeLine.str();
}
double GetTotalAverage(double** myArray, int i, int numExams)
{
	double totalAverage;
	double totalScore = 0;
	for (int j = 0; j < numExams; ++j)
	{
		totalScore = totalScore + myArray[i][j];
	}
	totalAverage = totalScore / numExams;
	return totalAverage;
}

#ifdef _MSC_VER
#define _CRTDBG_MAP_ALLOC
#include <crtdbg.h>
#define VS_MEM_CHECK _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
#else
#define VS_MEM_CHECK
#endif
#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <sstream>
using namespace std;


int main(int argc, char* argv[]) {
	if (argc < 3)
	{
		cerr << "Please provide name of input and output files";
		return 1;
	}
	cout << "Input file: " << argv[1] << endl;
	ifstream in(argv[1]);
	if (!in)
	{
		cerr << "Unable to open " << argv[1] << " for input";
		return 2;
	}
	cout << "Output file: " << argv[2] << endl;
	ofstream out(argv[2]);
	if (!out)
	{
		in.close();
		cerr << "Unable to open " << argv[2] << " for output";
		return 3;
	}
	VS_MEM_CHECK               // enable memory leak check
	// Your program..
	int numStudents = 0;
	int numExams = 0;
	//read in number of students and number of exams
	in >> numStudents >> numExams;
	// Skip the rest of the line
	in.ignore(std::numeric_limits<int>::max(), '\n');
	//set up array
	double** myArray = new double* [numStudents];
	for (int i = 0; i < numStudents; ++i)
	{
		myArray[i] = new double[numExams];
	}
	string* nameArray = new string[numStudents];
	for (int i = 0; i < numStudents; i++) {
		//fill name array
		string firstName;
		string lastName;
		in >> firstName >> lastName;
		nameArray[i] = firstName + " " + lastName;
		//fill exam score array
		for (int j = 0; j < numExams; j++) {
			int score;
			in >> score;
			myArray[i][j] = score;
		}
	}
	out << "Exam Averages:" << endl;
	//output average
	for (int i = 0; i < numExams; ++i)
	{
		out << "\t" << "Exam " << i << " Average =   ";
		out << setprecision(1);
		out << GetAverageScore(myArray, numStudents, i);
		out << endl;
	}
	//output student names and grades with letter grades
	out << "Student Exam Grades:" << endl;
	for (int i = 0; i < numStudents; ++i)
	{
		out << "\t" << nameArray[i];
		for (int j = 0; j < numExams; ++j)
		{
			out << "\t" << myArray[i][j];
			out << GetLetterGrades(myArray, i, j);
		}
		out << endl;
	}
	//output final numbers of grades
	out << "Exam Grades:" << endl;
	for (int i = 0; i < numExams; ++i)
	{
		out << "Exam   " << i << " ";
		out << ReturnNumberGrade(myArray, numStudents, numExams);
		out << endl;
	}
	//output each students final grade
	out << "Student Final Grades:" << endl;
	for (int i = 0; i < numStudents; ++i)
	{
		out << nameArray[i] << " ";
		out << GetTotalAverage(myArray, i, numExams);
	}
	//clear up memory
	for (int i = 0; i < numStudents; ++i)
	{
		delete[] myArray[i];
	}
	delete[] myArray;
	delete[] nameArray;
}