Scope Resolution Operator Demo

//scope_resolution.cpp

#include<iostream>
using namespace std;

int m =10 ; //global variable

main()
{
      int m =20;

 { //starting the block
  int k = m;
  int m = 30;
   cout << endl << " m = " << m;
   cout << endl << " k = " << k; 
   cout << endl << " ::m = " << ::m;
 }//ending the block

 cout << endl << " m = " << m;
 cout << endl << " ::m = " << ::m;
}