// Practice

// add code where indicated to finish the program.

#include <fstream>
#include <iostream>
#include <iomanip>
using namespace std;

bool importData(double[], const int, int &, ifstream &);

// ADD - 'exportData' function prototype (do after you have written definition)

// ADD -'subtractFive' function prototype(do after you have written definition)

int main()
{
	int count; // count holds the number of items put into the array.

	// ADD - create a constant integer of 100 named 'SIZE'

	// ADD - create an array of doubles with a size of 'SIZE' named 'jedi'


	ifstream fin;
	fin.open("input_file.txt");

	ofstream fout;
	fout.open("output_file.txt");

	// Import data - if data fails to be imported exit program
	if( importData(jedi, SIZE, count, fin) )
		return -1;


	// ADD - 'subtractFive' function call here (do after writing definition)


	// ADD - 'exportData' function call here (do after writing definition)


	fin.close();
	fout.close();

	return 0;
}

// imports data from file. returns true if operation fails, false if succeeds
bool importData(double J [], const int SIZE, int & cnt, ifstream & fin) //
{
	if(!fin){
		cout << "ERROR - File failed to open." << endl;
		return 1;
	}

	cnt = 0;

	while (fin >> J[cnt] && cnt < SIZE)
		cnt++;

	return 0;
}


// ADD - write a function called 'subtractFive' which subtracts 5 from each
// of the elements in the 'jedi' array. Implement in any way you choose.


// ADD - write a function called 'exportData' which exports the contents
// of array 'jedi' to output.txt. Each element should be on it's own line. 
// Implement in any way you choose.