ch-05-ex-03-solution.cpp
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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;
			}