actual meaning of scope resolution operator

Answer 1

The scope resolution operator ( :: ), is used to tell the program what function is part of what class (if you do functions outside the class).

Example:

myClass.h:

myClass
{
public:
myClass();
void func();
};

myClass.cpp:

#include "myClass.h"

myClass::myClass()
{
//code for constructor
}

void myClass::func()
{
//code for function
}

Answer 2

scope resolution operator is used to call any variable or function that is declared globally or in other function part