Global variables can be accessed even if a local variables have the same name

NOTE : -

THIS CONTENT IS NOT ORIGINAL

7. Global variables can be accessed even if a local variables have the same name

A global variable can be accessed even if another variable with the same name has been declared inside the function:

using namespace std;
#include 

double a = 128;

int main ()
{
  double a = 256;

  cout << "Local a:  " << a   << endl;
  cout << "Global a: " << ::a << endl;

  return 0;
}

Output

Local a: 256 Global a: 128

BIBILOGRAPHY / REFERENCE : - http://www.4p8.com/eric.brasseur/cppcen.html