With example, describe use of scope resolution operator.

With example, describe use of scope resolution operator.
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1 Answer

Answer :

In C, the global version of a variable cannot be accessed from within the inner block. C++ resolves this problem by introducing a new operator:: called scope resolution operator. This can be used to uncover a hidden variable. It takes the following form:

:: variable;

This operator allows access to the global version of a variable.

Example:

int student :: roll_no; // Using data members with the help of scope

resolution operator

or

void student :: performance ( ) // Using member function with the

help of scope resolution

operator

{ //Function Body }

Example:

# include<iostream.h >

int m = 10;

int main ( )

{

int m = 20;

{

int k = m;

int m = 30;

cout << “K =”<<k;

cout << “m =”<<m;

cout << “: : m =”<< : : m;

}

cout << “m=”<< m;

cout << “::m =” <<::m;

}

return 0;

}


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