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Hi folks,
i have some questions about the assignment operator in C++.
Sorry if they were asked before.


1) See the following code:

       class X {
           int values[10];
    /* no assignment operator defined */
           ...
       };

       main()
       {
           X a, b;

           a = b;  // What happens to values ?
       }

   What happens to "values" with "a = b" ?

    - illegal (assignment of constant pointer)

    - copies all elements of b.values to a.values

    - anything else


2) See the following code:

       class A {
           A& operator= (const A&);
           ...
       };

       class B : public A {
           B& operator= (const B&);
           ...
       };

       class C : public B {
    /* no assignment operator defined */
           ...
       };


       main()
       {
           C c1, c2;

           ...
           c1 = c2;    // What happens ?
 }

   What happens with "c1 = c2" ?

    - calls A::operator=(), B::operator=() and
      a memberwise copy for all NEW components of Class C

    - calls only B::operator=() and
      a memberwise copy for all NEW components of Class C

    - calls only B::operator=()

    - does a memberwise copy of ALL componentes of c1
      without calling assignments of A and B

    - anything else


Please answer direct with a mail to "nico@bredex.uucp".

BTW, are there any FAQs (Frequently Asked Questions)
available ?

aTdHvAaNnKcSe
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Nico
                                 address: BREDEX GmbH
email:   nico@bredex.uucp                 Nicolai Josuttis
                                          Kastanienallee 2a
phone:   +49 531 75480                    D-3300 Braunschweig
fax:     +49 531 79635                    Germany
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