ch-05-ex-03-solution.cpp
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	/*
	* chapter-05-exercise-03.cpp
	*
	* Swap functions
	*
	* Created on: Oct 8, 2012
	* Author: Radu Popescu <radu.popescu@epfl.ch>
	*/

	#include <iostream>

	void swap1(double const x, double const y) {
	const double temp = *x;
	x = y;
	*y = temp;
	}

	void swap2(double &x, double &y) {
	const double temp = x;
	x = y;
	y = temp;
	}

	int main(int argc, char *argv[]) {
	double x = 2.73;
	double y = -3.141592;

	std::cout << "The numbers are: " << x << " " << y << std::endl;

	swap1(&x, &y);

	std::cout << "We've swapped the numbers: " << x << " " << y << std::endl;

	swap2(x, y);

	std::cout << "And swapped them back: " << x << " " << y << std::endl;

	return 0;
	}