Using the scope resolution operator: '::' : block scope variable « Language Basics « C++ Tutorial

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C++ Tutorial » Language Basics » block scope variable

1.6.5.Using the scope resolution operator: '::'

#include <iostream>

using std::cout;

using std::endl;



int count1 = 100;



int main() {     

  int count1 = 10;

  int count3 = 50;

  cout << endl << "Value of outer count1 = " << count1;

  cout << endl << "Value of global count1 = " << ::count1;



  {              

    int count1 = 20;

    int count2 = 30;

    cout << endl << "Value of inner count1 = " << count1;

    cout << endl << "Value of global count1 = " << ::count1;

    count3 += count2;

  }                 



  cout << endl

       << "Value of outer count1 = " << count1

       << endl

       << "Value of outer count3 = " << count3;



  cout << endl;

  return 0;

}

Value of outer count1 = 10
Value of global count1 = 100
Value of inner count1 = 20
Value of global count1 = 100
Value of outer count1 = 10
Value of outer count3 = 80

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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