global and block scope : block scope variable « Language Basics « C++ Tutorial

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C++ Tutorial » Language Basics » block scope variable

1.6.6.global and block scope

#include <iostream.h>



int n=0;  //Global



main()

{

        int n = 1;

        {

               int n = 2 ;

               {

                        int n = 3;

                        cout << "In inner  n=" <<n<<endl;

                        cout << "Global    n=" << ::n <<endl;

               }

               cout << "In outter n=" <<n<<endl;

               cout << "Global    n=" <<::n<<endl;

        }

        cout << "In main() n=" << n<<endl;

        return 0 ;

}

In inner  n=3
Global    n=0
In outter n=2
Global    n=0
In main() n=1

1.6.block scope variable
	1.6.1.	Variable block scope
	1.6.2.	Variables can be local to a block
	1.6.3.	Inner block variable scope
	1.6.4.	Names in inner scopes can hide names in outer scopes.
	1.6.5.	Using the scope resolution operator: '::'
	1.6.6.	global and block scope
	1.6.7.	scope code block
	1.6.8.	global variables across functions
	1.6.9.	Using the scope resolution operator (2)

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