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/*
Name: student.cpp
Author: xRGTMx
Date: 1/8/2014 12:00
Description: This program uses a text file named studData.txt as input, which
contains the first and last names of each student, and two test
scores. The program takes the first and last names of the student,
adds the two test scores, and gives the overall rank of the students.
Students who have an F are not ranked.
*/

// header
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
#include <cstdlib>

using namespace std;

// declare function prototypes
char calculateGrade(double tot); // parameter passed is not an array

int main()
{
ifstream inFile; // declare inFile as an object of ifstream
ofstream outFile; // decleare outFile as an object of ofstream

inFile.open("studData.txt"); // open input file
outFile.open("student.out");

// declare arrays
string studentLastNames[100];
string studentFirstNames[100];
double score1[100];
double score2[100];
double fTotal[100];
char fGrade[100];

// declare variables
double total;
char grade;

// counter will keep track of all records
int counter = 0;

// error message if input file is not found
if (!inFile)
{
cout << "Cannot open the input file." << endl;
system("Pause");
return 1;
}//end if


while (!inFile.eof())
{
// read data within input file
inFile >> studentLastNames[counter] >> studentFirstNames[counter]
>> score1[counter] >> score2[counter];

// calculate total by adding two scores of each record
total = score1[counter] + score2[counter];

fTotal[counter] = total;
grade = calculateGrade(total);
fGrade[counter] = grade;

// counter records number of records
counter = counter + 1;
} //end while

// sort all records using Bubble sort algorithm

// declare sort variables
string temp, temp1;
double temp2, temp3, temp4;
char temp5;

// the following loop will sort the records by total
for (int iteration = 1; iteration < counter; iteration++)
{
for (int index = 0; index < counter - iteration; index++)
{
if (fTotal[index] < fTotal[index + 1])
{
temp = studentLastNames[index];
temp1 = studentFirstNames[index];
temp2 = score1[index];
temp3 = score2[index];
temp4 = fTotal[index];
temp5 = fGrade[index];

studentLastNames[index] = studentLastNames[index + 1];
studentFirstNames[index] = studentFirstNames[index +1];
score1[index]= score1[index+1];
score2[index] = score2[index+1];
fTotal[index] = fTotal[index+1];
fGrade[index] = fGrade[index+1];

studentLastNames[index + 1] = temp;
studentFirstNames[index + 1] = temp1;
score1[index + 1] = temp2;
score2[index +1] = temp3;
fTotal[index +1] = temp4;
fGrade[index +1] = temp5;
} // end if
} // end for
} // end for

// header for output file
outFile << "\t\t CIS350 - Software Design\t\t\n";
outFile << "\t\t-----------------------------\t\t\n";
outFile << "\t\t Spring 2012 Grade Sheet\t\t\n";
outFile << "\t\t-----------------------------\t\t\n" << endl;

// column headers and border
outFile << setw(9) << "Last Name" << setw(12) << "First Name"
<< setw(10) << "Score 1" << setw(10) << "Score 2"
<< setw(15) << "Total" << setw(15) << "Grade"
<< setw(10) << "Rank" << endl;
outFile << "----------------------------------------------------------------------------------" << endl;

// data for output file will be written in this loop

for (int i = 0;i < counter; i++)
{
outFile << fixed << showpoint << setprecision(2);
outFile << setw(12) << left << studentLastNames[i] << setw(15)
<< studentFirstNames[i] << setw(10) << left << setw(10)
<< score1[i] << setw(10) << score2[i] << setw(10)
<< right << fTotal[i] << setw(10)
<< setw(11) << right << fGrade[i];

if (fGrade[i] != 'F')
outFile << right << setw(10) << i + 1 << endl;

else
outFile << endl;
}//end for

// close all files
inFile.close();
outFile.close();

// print message to user
cout << "Please open 'student.out' to view report.\n" << endl;

system("pause");
return 0;
} // end main

// function to calculate lettter grade, returining a character value
char calculateGrade(double tot)
{
if (tot >= 90)
return 'A';
else if (tot >= 80)
return 'B';
else if (tot >= 70)
return 'C';
else if (tot >= 60)
return 'D';
else
return 'F';
} // end calculateGrade