#include <iostream>

using namespace std;

/*
 * Swap function (same as before, but with double).
 */
void swap(double &a, double &b)
{
	int t = a;
	a = b;
	b = t;
}

/*
 * This function uses reference paramters to return several
 * calculated values.   Takes x and y, and returns their absolute difference,
 * mean and sum of squares.
 */
void stats(double x, double y, double &absdif, double &mean, double &sumsqr)
{
	if(x > y) swap(x, y);

	absdif = y - x;
	mean = (x + y) / 2.0;
	sumsqr = x*x + y*y;
}

/*
 * Test driver
 */
int main()
{
	// First example.
	double c = 4.56;
	double d =  -3.45;
	double absdif, mean, ss;
	stats(c, d, absdif, mean, ss);
	cout << c << " " << d << " " << absdif << " " << 
		mean << " " << ss << endl;

	// Second example
	stats(22.0, 41.5, absdif, mean, ss);
	cout << absdif << " " << mean << " " << ss << endl;
}