// Question 5:  (10 points)  What does the following program print out?
#include<iostream>
using namespace std;

int foo(int x, int &y){
	y = x;
	x = y;
	return x + y;
}

int main(){
	int x = 5, y = 10;
	cout << foo(x, y) << "  " << x << "  " << y << endl;
	return 0;
}