Is it possible to access private members of a class?

Question

Is it possible to access private members of a class in c++.

provided you don\'t have a friend function and You don\'t have access to the class def

Answer 1

Well I might be talking rubish, but I think you could try to define a "twin" class with same members as the class you want to modify but different public/private modifiers and then use reintepret_cast to cast the original class to yours in which you can access the private members.

Its a bit hacky ;-)

A bit of code to explain the idea:

class ClassWithNoAccess 
{
public:
  someMethod();

private:
  int someVar;
};

class ClassTwin 
{
public:
  someMethod();

public:
  int someVar;
}

and somewhere in the code:

ClassWithNoAccess* noAccess = new ClassWithNoAccess();
ClassTwin* twin = reinterpret_cast(noAccess);
twin->someVar = 1;

edit: so like someone already wrote before, this might work but the standard does not guarantee the order of the variables with public and private modifier will be the same