#include <iostream>
#include <fstream>
#include <string>

using namespace std;

struct course	//struct for course 1 and course 2 sets	
{
       string name[7];
       int ID[7];
       int score[7];
};

struct results	//struct for results set
{
       int ID[7];
       int avg[7];
};
// all function prototypes used
int menu();
void initializeCs(course cs[]);
void avg(course cs[], results& rs, int&);
void initializeRes(results& rs);
void passFail(course cs[], results rs, int);
void displayCs(course cs[]);
void displayRes(results rs);
void viewBest(course cs[], results rs, int);
void viewPFile();
void viewFFile();

int main()
{
	int choice=0;			//declare all variables
    course cs[2];
    results rs;
    int best;
    
	while(choice!=7)			
	{

	choice=menu();

	switch(choice)			//switch statement for menu items
	{
		case 1:
			initializeCs(cs);
			initializeRes(rs);
			avg(cs, rs, best);
			passFail(cs, rs, best);
		break;

		case 2:
			displayCs(cs);
		break;

		case 3:
			displayRes(rs);
		break;

		case 4:
			viewBest(cs, rs, best);
		break;

		case 5:
			viewPFile();
		break;

		case 6:
			viewFFile();
		break;

		case 7:
		break;

		default:
			cout << "PLEASE CHOOSE FROM OPTIONS 1-7." << endl << endl;
		break;
	};

	}

    return 0;
}

int menu()		//Menu for teachers selection
{
	int choice;

	cout << "1. Create and initialize the arrays COURSE1 and COURSE2." << endl;
	cout << "2. Display the current contents of all the arrays COURSE1 and COURSE2." << endl;
	cout << "3. Display the Result set." << endl;
	cout << "4. View the details of the Best Student." << endl;
	cout << "5. View the Pass.dat file." << endl;
	cout << "6. View the Fail.dat file." << endl;
	cout << "7. Quit." << endl << endl;

	cout << "Choose 1-7: ";
		cin >> choice;

	cout << endl;

	return choice;
}

void initializeCs(course cs[])			//array for course 1 and 2 under course cs
{
     for (int i=0; i<2; i++)
     {      
         if(i==0)
         {
                cs[i].name[0]="Alice";
                cs[i].name[1]="Bob";
                cs[i].name[2]="Chris";
                cs[i].name[3]="David";
                cs[i].name[4]="Leo";
                cs[i].name[5]="Mike";
                cs[i].name[6]="Stephen";

				// for some reason, i can't store leading zeros without getting errors
                
                /*cs[i].ID[0]=001221;
                cs[i].ID[1]=001265;
                cs[i].ID[2]=001283;
                cs[i].ID[3]=001241;
                cs[i].ID[4]=001298;
                cs[i].ID[5]=001237;
                cs[i].ID[6]=001243;*/

                cs[i].ID[0]=1221;
                cs[i].ID[1]=1265;
                cs[i].ID[2]=1283;
                cs[i].ID[3]=1241;
                cs[i].ID[4]=1298;
                cs[i].ID[5]=1237;
                cs[i].ID[6]=1243;

                cs[i].score[0]=38;
                cs[i].score[1]=47;
                cs[i].score[2]=85;
                cs[i].score[3]=72;
                cs[i].score[4]=40;
                cs[i].score[5]=64;
                cs[i].score[6]=96;
         }

         if(i==1)
         {
                cs[i].name[0]="Alice";
                cs[i].name[1]="Mike";
                cs[i].name[2]="David";
                cs[i].name[3]="Stephen";
                cs[i].name[4]="Bob";
                cs[i].name[5]="Chris";
                cs[i].name[6]="Leo";

				// same problem here
                
                /*cs[i].ID[0]=001221;
                cs[i].ID[1]=001237;
                cs[i].ID[2]=001241;
                cs[i].ID[3]=001243;
                cs[i].ID[4]=001265;
                cs[i].ID[5]=001283;
                cs[i].ID[6]=001298;*/
				
                cs[i].ID[0]=1221;
                cs[i].ID[1]=1237;
                cs[i].ID[2]=1241;
                cs[i].ID[3]=1243;
                cs[i].ID[4]=1265;
                cs[i].ID[5]=1283;
                cs[i].ID[6]=1298;

                cs[i].score[0]=42;
                cs[i].score[1]=55;
                cs[i].score[2]=78;
                cs[i].score[3]=98;
                cs[i].score[4]=45;
                cs[i].score[5]=99;
                cs[i].score[6]=35;
         }
     }

	 cout << "Initialized..." << endl << endl;
     
     return;
}

void initializeRes(results& rs)			//array for results 
{
	// same problem here

    /*rs.ID[0]=001221;
    rs.ID[1]=001237;
    rs.ID[2]=001241;
    rs.ID[3]=001243;
    rs.ID[4]=001265;
    rs.ID[5]=001283;
    rs.ID[6]=001298;*/
        
	rs.ID[0]=1221;
    rs.ID[1]=1237;
    rs.ID[2]=1241;
    rs.ID[3]=1243;
    rs.ID[4]=1265;
    rs.ID[5]=1283;
    rs.ID[6]=1298;
	
	return;
}
//function to calculate average score and determine the best student
void avg(course cs[], results& rs, int& best)
{
     rs.avg[0] = ( (cs[0].score[0] + cs[1].score[0]) / 2);
     best=0;
     
     rs.avg[1] = ( (cs[0].score[5] + cs[1].score[1]) / 2);
     if(rs.avg[1]>rs.avg[best])
         best=1;
     
     rs.avg[2] = ( (cs[0].score[3] + cs[1].score[2]) / 2);
     if(rs.avg[2]>rs.avg[best])
         best=2;

     rs.avg[3] = ( (cs[0].score[6] + cs[1].score[3]) / 2);
     if(rs.avg[3]>rs.avg[best])
         best=3;
     
     rs.avg[4] = ( (cs[0].score[1] + cs[1].score[4]) / 2);
     if(rs.avg[4]>rs.avg[best])
         best=4;
     
     rs.avg[5] = ( (cs[0].score[2] + cs[1].score[5]) / 2);
     if(rs.avg[5]>rs.avg[best])
         best=5;
     
     rs.avg[6] = ( (cs[0].score[4] + cs[1].score[6]) / 2);
     if(rs.avg[6]>rs.avg[best])
         best=6;
     
     return;
}
//passes the students who pass or fail to their respective files
void passFail(course cs[], results rs, int best)
{
     ofstream fout;
     
   for(int i=0; i<7; i++)
   {
       if(i==0)
       {
         if(rs.avg[0]>=45)
           fout.open("pass.dat", ios::app);
         
         else
           fout.open("fail.dat", ios::app);
                    
           fout << cs[0].name[0];
         
           if((rs.avg[0]>=45) && (best==0))
             fout << " *** This student received the Best Student award ***" << endl;
           else
             fout << endl;
             
           fout << rs.ID[0] << endl;
           fout << cs[0].score[0] << endl;
           fout << cs[1].score[0] << endl;
           fout << rs.avg[0];

           fout.close();
       }
     
     if(i==1)
     {
       if(rs.avg[1]>=45)
         fout.open("pass.dat", ios::app);
         
       else
         fout.open("fail.dat", ios::app);
         
         fout << cs[0].name[5];
         
         if((rs.avg[1]>=45) && (best==1))
             fout << " *** This student received the Best Student award ***" << endl;
         else
             fout << endl;
             
         fout << rs.ID[1] << endl;
         fout << cs[0].score[5] << endl;
         fout << cs[1].score[1] << endl;
         fout << rs.avg[1];

         fout.close();
     }
     
     if(i==2)
     {
       if(rs.avg[2]>=45)
         fout.open("pass.dat", ios::app);
         
       else
         fout.open("fail.dat", ios::app);
         
         fout << cs[0].name[3];
         
         if((rs.avg[2]>=45) && (best==2))
             fout << " *** This student received the Best Student award ***" << endl;
         else
             fout << endl;
             
         fout << rs.ID[2] << endl;
         fout << cs[0].score[3] << endl;
         fout << cs[1].score[2] << endl;
         fout << rs.avg[2];

         fout.close();
     }
     
     if(i==3)
     {
       if(rs.avg[3]>=45)
         fout.open("pass.dat", ios::app);
       
       else
         fout.open("fail.dat", ios::app);
         
         fout << cs[0].name[6];
         
         if((rs.avg[3]>=45) && (best==3))
             fout << " *** This student received the Best Student award ***" << endl;
         else
             fout << endl;
             
         fout << rs.ID[3] << endl;
         fout << cs[0].score[6] << endl;
         fout << cs[1].score[3] << endl;
         fout << rs.avg[3];

         fout.close();
     }
     
     if(i==4)
     {
       if(rs.avg[4]>=45)
         fout.open("pass.dat", ios::app);
         
       else
         fout.open("fail.dat", ios::app);
         
         fout << cs[0].name[1];
         
         if((rs.avg[4]>=45) && (best==4))
             fout << " *** This student received the Best Student award ***" << endl;
         else
             fout << endl;
             
         fout << rs.ID[4] << endl;
         fout << cs[0].score[1] << endl;
         fout << cs[1].score[4] << endl;
         fout << rs.avg[4];

         fout.close();
     }
     
     if(i==5)
     {
       if(rs.avg[5]>=45)
         fout.open("pass.dat", ios::app);
         
       else
         fout.open("fail.dat", ios::app);
         
         fout << cs[0].name[2];
         
         if((rs.avg[5]>=45) && (best==5))
             fout << " *** This student received the Best Student award ***" << endl;
         else
             fout << endl;
             
         fout << rs.ID[5] << endl;
         fout << cs[0].score[2] << endl;
         fout << cs[1].score[5] << endl;
         fout << rs.avg[5];

         fout.close();
     }
     
     if(i==6)
     {
       if(rs.avg[6]>=45)
         fout.open("pass.dat", ios::app);
         
       else
         fout.open("fail.dat", ios::app);
         
         fout << cs[0].name[4];
         
         if((rs.avg[6]>=45) && (best==6))
             fout << " *** This student received the Best Student award ***" << endl;
         else
             fout << endl;
             
         fout << rs.ID[6] << endl;
         fout << cs[0].score[4] << endl;
         fout << cs[1].score[6] << endl;
         fout << rs.avg[6];

         fout.close();
     }
   }
     
     return;
}
//function to display the contents of course 1 and course2
void displayCs(course cs[])
{
    for(int i=0; i<2; i++)
    {
		cout << "Course # " << i+1 << ":" << endl << endl;

            for(int j=0; j<7; j++)
            {
				cout << cs[i].name[j] << endl;
				cout << "00" << cs[i].ID[j] << endl;
                cout << cs[i].score[j] << endl << endl;
            }
    } 
     
     return;
}
//function to display the results 
void displayRes(results rs)
{
	for(int i=0; i<7; i++)
	{
		cout << "ID: 00" << rs.ID[i] << endl;
		cout << "Average: " << rs.avg[i] << endl << endl;
	}

     return;
}
//function to view the details of the best student
void viewBest(course cs[], results rs, int best)
{    
		cout << "The Best Student Award goes to:" << endl << endl;

		cout << "Name: " << cs[1].name[best] << endl;
		cout << "ID: 00" << rs.ID[best] << endl;
		cout << "Course 1 Score: ";

		if(best==0)
			cout << cs[0].score[0] << endl;

		if(best==1)
			cout << cs[0].score[5] << endl;

		if(best==2)
			cout << cs[0].score[3] << endl;

		if(best==3)
			cout << cs[0].score[6] << endl;

		if(best==4)
			cout << cs[0].score[1] << endl;

		if(best==5)
			cout << cs[0].score[2] << endl;

		if(best==6)
			cout << cs[0].score[4] << endl;

		cout << "Course 2 Score: " << cs[1].score[best] << endl;

		cout << "Average Score: " << rs.avg[best] << endl << endl;							
	
	return;
}
//function to view all the contents of the pass.dat file
void viewPFile()
{
	ifstream fin;
	string f1;
	int f2, f3, f4, f5;


	fin.open("pass.dat");

	while(!fin.eof())
	{

	getline(fin, f1);
	fin.ignore();

	fin >> f2 >> f3 >> f4 >> f5;

	cout << "Name: " << f1 << endl;
	cout << "ID: 00" << f2 << endl;
	cout << "Course 1 Score: " << f3 << endl;
	cout << "Course 2 Score: " << f4 << endl;
	cout << "Average Score: " << f5 << endl << endl;
	
	};

	fin.close();

     return;
}
//function to view the contents of the fail.dat file
void viewFFile()
{
	ifstream fin;
	string f1;
	int f2, f3, f4, f5;


	fin.open("fail.dat");

	while(!fin.eof())
	{
	
	getline(fin, f1);
	fin.ignore();

	fin >> f2 >> f3 >> f4 >> f5;

	cout << "Name: " << f1 << endl;
	cout << "ID: 00" << f2 << endl;
	cout << "Course 1 Score: " << f3 << endl;
	cout << "Course 2 Score: " << f4 << endl;
	cout << "Average Score: " << f5 << endl << endl;
	
	};

	fin.close();

	return;
}