Scope Resolution Operators

Operators Scope resolution operator(::) in C++ program is typically used to define a function outside a class, or in cases where we want to use a global variable but have a local variable with the same name. This is shown in the example below: 

Example:

#include <iostream>
 
char c = 'a';     // global variable
 
int main() {
char c = 'b';   //local variable
 
cout << "Local  variable: " << c << "n";      
cout << "Global variable: " << ::c << "n";  //using scope resolution operator
 
return 0;
}

Also, this is an example of a Scope resolution operator in class:

#include <iostream>
 
class programming {
public:
void output();  //function declaration
};
 
// function definition outside the class 
 
void programming::output() {
cout << "Function defined outside the class.n";
}
 
int main() {
programming x;
x.output();
 
return 0;
}