#include
<iostream.h>
void times2(int
&v1, int &v2); // function prototype
void main() {
int x = 10;
int y = 15;
cout << "x is "
<< x << " and y is " << y << endl;
times2(x,y);
cout << “Now: x is "
<< x << “, y is "
<< y << endl;
}
void times2(int
&v1, int &v2) { v1 = v1* 2; v2 = v2 * 2; }