[ccyndimolina]

#include <iostream>
#include <iomanip>
#include <fstream>

using namespace std;

	//Function prototypes
void calculateAverage(ifstream& inp, double& avg);
void printResult(ofsream& outp, double sum, double avg);

int main()
{
	int numberOfNumbers;
	int num;
	double avg1;
	double sum;
	ifstream numbers;
	ofstream numbers2;

	numbers.open("numbers.txt");
	
	if (!numbers)
	{
		cout << "Unable to open files." << endl;
		cout << "Program terminates." << endl;
		return 1;
	}

	numbers2.open("numbers2.txt");
	numbers2 << fixed << showpoint;
	numbers2 << setprecision(2);

	int num = 0;
	double sum = 0.0;
	int numberOfNumbers = 0;

	numbers >> num;

	while (numbers)
	{
		calculateAverage(numbers, sum);
		printResult(numbers2, sum, avg);
		avg1 = avg1 + avg;
		outfile << endl;
		numberOfNumbers++;
	}
}

numbers2 << "Sum for numbers: "
		 << sum / numberOfNumbers
		 << endl;
numbers2 << "Avg for numbers: "
		 << sum / numberOfNumbers
		 << endl;
}

numbers.close();
numbers2.close();

return 0;
}

void calculateAverage(ifstream& inp, double& avg)
{
	double sum = 0.0;
	int numberOfNumbers = 0;
	int num;

	inp >> num;
	while (num != -999)
	{
		sum = sum + num;
		numberOfNumbers++;
		inp >> num;
	}
}

[n8wxs]

What problem(s) are you having?

[seeP+]

You did not define the printResult().
You pass the value of sum to calculateAverage() as a refrence, but your not even using it in that function, which is now named 'avg'. So the referenced value never changes(still 0.0). The sum that you pass to the function is different from the one created in the function. You need to read up on passing values to functions.

This post has been edited by seeP+: 30 January 2010 - 10:43 PM