#include <iostream>
using namespace std;

int add1(int &x) {
	x += 5;
	cout << "in function 1:  x = " << x << endl;
	return x;
}

int add2(int &x) {
	x += 10;
	cout << "in function 2:  x = " << x << endl;
	return x;
}

int main() {
	int x = 0;
	cout << add1(x) << " " << add2(x) << endl;
	return 0;
}