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void *malloc(unsigned);
int free (void *);

struct tag_name {       //tag_name is also a type in C++
        int   i;
        float f;
};

class class_one {
        tag_name t;     //implicitly declare class_one *this;
  public:
        class_one (int i0 = 0, float f0 = 0) { t.i = i0, t.f = f0; }
        class_one *tag() { return this; }
};

class class_two {
  public:
        class_two (unsigned size) { this = (class_two *) malloc (size); }
        ~class_two() { free (this); this = 0; }
};

main()
{
        class_one c1 (1, 1.1), cc1;
        class_two c2 (sizeof(class_two)) ;

        cc1 = *c1.tag();
}