#include<iostream.h>
 
int x=0;
 
int main()
{
int x=1;
{
   int x=2;
   cout<<::x;
 
cout<<x;
}
return 0;
}

int x=0; // global x
int main()
{
   int x=1; // main x
   {
       int x=2; // block x
       cout<< x<<endl; // prints block x
       cout<< ::x <<endl; // prints global x accessed with :: scope resolution operator
      // there is no way to access main x from here
   } // block x dies here
   cout<< x; // prints main x
   cout <<::x; // prints global x
   return 0;
}

#include<iostream.h>
 
int x=0;
 
int main()
{
int x=1;
{
   cout<<x;//access it before declaring variable in this local scope
   int x=2;
   cout<<::x;
   cout<<x   
 
}
return 0;
}