//-------------------------------------------------------------------
// File   :main.C
// Author :Alicia Thorsen
// Course :CS1129
//
// Program reads student names and numeric grades from an input file, 
// calculates their letter grades and writes it all to an output file.
//-------------------------------------------------------------------

#include "application.h"
#include <iostream>
#include <cstdlib>
using namespace std;

int main(int argc, char* argv[]) {
  string inputFileName;
  Application grader;

  // Check if the input file was specified on the command line.
  if (argc != 2) {
    cerr << "Usage: " << argv[0] << " filename" << endl;
    exit(1);
  }

  // Get file name.
  inputFileName = argv[1];

  cout << "Reading courses." << endl;
  grader.readInputFile(inputFileName);
  
  cout << "Calculating grades." << endl;
  grader.calcLetterGrades();
  
  cout << "Writing to output file." << endl;
  grader.writeOutputFile();
  return 0;
}