#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; }