#include <iostream>
using namespace std;

int sample( int x );

int y = 10; // global variable

int main()
{
	cout << "y = " << y << endl;

	double y = 2.3; // local y
	cout << "y = " << y << endl;

	int z = 5;
	z = sample(z);
	cout << "z = " << z << endl;

	return 0;
}

int sample( int x )
{
	cout << "sample: y = " << y << endl;
	return x * y;
}