What are the limitations of constant member functions?

Code:

1. Class coo
2. {
3. Public:
4. Coo (): A (0)
5. {}
7. Int geta () const // constant member function
8. {
9. ++ A; // compilation Error
10. Return this->;
11. }
12. PRIVATE:
13. Int;
14. };

Of course, this Code cannot be compiled. But what about the following section?

Code:

1. Class CoO2
2. {
3. Public:
4. CoO2 (): p (New int (0 )){}
5. ~ CoO2 () {Delete P ;}
7. Int const * getp () const // constant member function
8. {
9. * P = 1; // compile OK
   
10. Return this-> P;
11. }
12. PRIVATE:
13. Int * P;
14. };

The answer is that the compilation is successful because the code is correct. In terms of semantics, CoO2 objects have pointers instead of pointers. :)

If you want to communicate with me, click the following link to become a friend:
Http://student.csdn.net/invite.php? U= 112600 & C = f635b3cf130f350c