//Timothy Tran Program #5
//This program will build an array of numbers from an
//input file and find its average and differences.
#include <iostream>
#include <fstream>
using namespace std;

void readdata (int, double[]);
void printarray(int, double[]);
double findaverage(int, double[]);
void howfaraway(int, double, double[], double[]);

ifstream infile("num.txt");

int main() {

  int size;
  double first[size];
  double average;
  double second[size];

  infile >> size;
  readdata(size, first);
  cout << "Here is the original array." << endl;
  printarray(size, first);
  average = findaverage(size, first);
  cout << "The average is equal to" << average << endl;
  howfaraway(size, average, first, second);
  cout << "This is the new array for this program" << endl;
  printarray(size, second);
  cout << "The new average is equal to" << findaverage(size, second) << endl;

  infile.close();

  return 0;
}
// readdata will read in multiple data's into an array. The
// data will be used throughout the program.
void readdata(int n, double numbers[])
{
  for(int i = 0; i <= n; i++){
    infile >> numbers[i];
  }

  return;
}
// printarray will print an array of the numbers in rows of five.
// After the five it goes tot he next row.
void printarray(int q, double numbs[])
{
  cout << "Here is the original array." << endl;

  cout.setf(ios::fixed,ios::floatfield);
  cout.precision(2);

  for(int i = 0; i <= q; i++){
    cout << numbs[i] << "  ";
    if((i+1) % 5 == 0){
      cout << endl;
    }
  }

  cout << endl;

  return;
}
// findaverage will find the average of the total of the array numbers
// and divide it by tht many numbers.
double findaverage(int k, double p[])
{
  int i;
  double sum;
  double avg;

  for(i = 0; i <= k; i++){
    sum = sum + p[i];
  }

  avg = sum / i;

  return avg;
}
// howfaraway will find the difference between the the original arrays average and the
// number itself.
void howfaraway (int m, double avg, double r[], double s[])
{
  for(int i = 0; i <= m; i++){
    s[i] = r[i] - avg;
  }

  return;
}