/***************************************************/
// L Frye
// CSC135010 - Spring 2008
// Program #1
// Due: Feb 14, 2008
// Filename: avgs.cpp
// Description: This program will find a student's test average
/***************************************************/
#include <iostream>
#include <iomanip>
#include <fstream>

#define NUMTESTS 3

using namespace std;

int getInput(ifstream &infile, string &name, float &test1,
	      float &test2, float &test3);
float calcAvg(float test1, float test2, float test3);
void print(string name, float avg);

int main()
{
  // variable declarations
  string name;   // student's name
  float test1, test2, test3;
  float avg;     // test average
  ifstream infile;
  int res;

  // Open file
  infile.open("averages.data");
  if (infile.fail())
    {
      cout << endl;
      cout << "Error opening input file averages.data" << endl << endl;
      return 0;
    }  // end if fail

  cout << fixed << showpoint; // print in fixed-point with decimal
  cout << setprecision(2);    // print two places after decimal

  // read first line of file
  res = getInput(infile, name, test1, test2, test3);
  while (res == 1)
    res = getInput(infile, name, test1, test2, test3);
  
  while (!infile.eof())
    {      
      // processing
      avg = (test1 + test2 + test3) / NUMTESTS;

      // print results
      print(name, avg);

      // get input
      res = getInput(infile, name, test1, test2, test3);
      while (res == 1)
	res = getInput(infile, name, test1, test2, test3);
    }  // end eof loop

  infile.close();
  
  return 0;
}


int getInput(ifstream &infile, string &name, float &test1,
	      float &test2, float &test3)
{
  getline(infile, name);
  infile >> test1;
  if (test1 < 0)
    {
      infile.ignore(100, '\n');
      return 1;
    }  // end if 
  infile >> test2;
  if (test2 < 0)
    {
      infile.ignore(100, '\n');
      return 1;
    }  // end if 
  infile >> test3;
  if (test3 < 0)
    {
      infile.ignore(100, '\n');
      return 1;
    }  // end if 
  infile.ignore(10, '\n');  // skip over newline character
  return 0; 
} // end function getInput

float calcAvg(float test1, float test2, float test3)
{
  float avg;
  avg = (test1 + test2 + test3) / NUMTESTS;
  return avg;
}  // end function calcAvg

void print(string name, float avg)
{
  cout << left << setw(25) << name;
  cout << "Average = ";
  cout << right << setw(7) << avg << "%" << endl;
  return;
} // end function print