C++ ::
/* :: is the scope resolution operator
*
* It allows to access objects outside of their scope, e.g to implement
* a function of a class from outside the class
*/
class foo { // define class named foo
public:
foo(); // constructor
void bar(); // function
};
foo::foo()
{
// Implement the constructor from outside the class
}
void foo::bar()
{
// Implement bar from outside the class
}
void bar()
{
// Implement different bar which is not within the same scope
}