Perfect number

gistfile1.txt

#include <iostream>
#include <cmath>
#include <iomanip>

using namespace std;

bool isAFactor (int, int);

int main ()
{
	int startVal, endVal, sum = 0;

	cout << "Enter starting integer: ";
	cin >> startVal;
	cout << endl;
	cout << "Enter ending integer: ";
	cin >> endVal;
	cout << endl;

	for (int i = startVal; i <= endVal; i++)
	{
		for (int j = 1; j <= i/2; j++)
		{
			if (isAFactor(i,j))
				sum += j;
		}

		if (sum == i)
		{
			cout << i << " is a perfect number." << endl;
		}

                if (sum!= i)
                {
                        cout << "There is no perfect number in this range." << endl;
                }
		sum = 0;
	}

	cout << endl;

	system("PAUSE");
	return 0;
}

bool isAFactor(int a, int b)
{
	if ( a % b == 0)
		return true;
	else
		return false;
}