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(C++) operator::

operator:: (pronounced as 'scope operator') is an operator to determine the namespace used.

The example below shows how to call a function in the global namespace and that std::cout is in the std namespace.


#include <iostream>



void X()

{

  std::cout << "Hello world\n";

}



int main()

{

  ::X(); //Scope operator can be omitted

}

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