//////////////////////////////////////////////////////////////////////////
//                                name.c                                //
//                                                                      //
// Purpose                                                              //
// =======                                                              //
// The program obtains a finite set of readings from the user           //
// and calculates the "running averages" (which is a set                //
// of values where each value is the average amonst the                 //
// readings read up to the current reading)                             //
// The readings are temporarily stored in an array.                     // 
// The averages are stored in an array                                  //
//                                                                      //
// Author            Creation Date                                      //
// ======            =============                                      //
// AY                30 November 1999                                   //
//                                                                      //
// Input/Output                                                         //
// ============                                                         //
// The input is the number of readings (int) and the readings (double). //
// The input is expected to be from a file - the name of the file is    //
// entered by the user                                                  //
// The output is the set of averages (doubles) where the averages(i) is //
// equal to the average value among all readings                        //
// These averages are stored in another file, whose name is also        //
// entered by the user                                                  //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

#include <iostream>
using namespace std;

#include <fstream.h>
#include "Array.h"
#include "Text.h"

const int MAXSIZE = 100;

int main()
{
  
  // declare and set Max size of the array of readings
  Array<double> readings;
  readings.setSize(MAXSIZE);
  // declare and set Max size of the array of averages
  Array<double> averages;  
  averages.setSize(MAXSIZE);
  // initialise both arrays with zero's
  for (int i = 0; i<readings.size(); i++)
  { 
    readings(i) = 0.0;
    averages(i) = 0.0;
  }
 
  int noOfReadings; // actual number of readings
  
 // enter name of file with input data
  cout << "Enter the name of the file with readings data: ";
  Text fileName1;
  cin >> fileName1;
  cin.ignore(80, '\n');
  
  ifstream myDataFile;
  myDataFile.open(fileName1);
  
  // input data from the file
  
  myDataFile >> noOfReadings;

   // input actual readings from file
  for (int i=0; i< noOfReadings; i++)
  {
      myDataFile >> readings(i); 
  }  
   
   // find averages 
   // initialise running total
  double total = 0;
  for (int i = 0; i < noOfReadings; i++)
  {
   total = total +  readings(i);
   averages(i) = total/(i+1);
  }
  
  // output the results
  cout << "Enter the name of the file where to store the averages (output) data: ";
  Text fileName2;
  cin >>  fileName2;
  cin.ignore(80, '\n');

  ofstream myResultsFile;
  myResultsFile.open(fileName2);
  // input actual readings from file
  for (int i=0; i< noOfReadings; i++)
  {
      myResultsFile << averages(i) << endl; 
  }  
  cout << "End of Readings";
  myDataFile.close();
  myResultsFile.close(); 
  return 0;
} // end main()