Private attribute access

#include <stdio.h>

class A
{
private:
    int a, b, c;
public:
    A()
    {
        a = 1;
        b = 2;
        c = 3;
    }
    void Print()
    {
        printf("%i %i %i\n", a, b, c);
    }
};

struct APrivate
{
    int* a;
    int* b;
    int* c;

    APrivate(A* _this)
    {
        a = ((int*)_this) + 0;
        b = ((int*)_this) + 1;
        c = ((int*)_this) + 2;
    }
};

int main()
{
    A a;
    APrivate ap(&a);

    // Before
    a.Print();

    // After
    *ap.a = 4;
    *ap.b = 5;
    *ap.c = 6;
    a.Print();
}