// File: f1.cpp
#include <iostream>
using namespace std;

int x = 10000;

void f()
{
   int x;
   x = 1;
   cout << ::x << endl;
   {
      int x;
      x = 2;
      cout << x << endl;   // Prints inner x = 2
   }
   cout << x << endl;      // Prints outer x = 1
}