#include <iostream>
using namespace std;
void passByVal(int v) {
cout << "passByVal's v is at address " << &v << ", and holds " << v << endl;
}
void passByRef(const int& r) {
cout << "passByRef's r is at address " << &r << ", and holds " << r << endl;
}
int main() {
int x = 23;
int y = 19;
cout << "main's x is at address " << &x << ", and holds " << x << endl;
cout << "main's y is at address " << &y << ", and holds " << y << endl;
cout << "(example-1 does nothing else.)" << endl;
return 0;
}