[C++]Undefined Behaviour

[Luc@s]

Undefined Behaviour o comportamento indefinito....questo sconosciuto!
In C++ quando si ha?
Io fin'ora ho trovato questo....

1) dereferencing a null pointer
2) accessing outside the bounds of an array
3) deleting the same memory twice
4) dereferencing a pointer after it has been deleted
5) dereferencing a pointer which points to a destroyed object
6) accessing an uninitialised variable
7) signed integer overflow
8) modifying a const object
1) main returning void
2) Copying a pointer after it has been deleted
3) Using mismatched forms of new/delete for arrays
4) Modifying a string literal
5) Changing a variable twice without a sequence point
6) Instantiating an STL container with auto_ptr
7) Adding declarations/definitions to std namespace
8) Playing around with reinterpret_cast
1) Dividing by zero
2) Pointer arithmetic that crosses array bounds
3) Returning a reference or pointer to a local variable
4) Writing to a member of a union and then reading another one
5) Deleting a derived class object though a pointer to a base class that
has no virtual destructor
7) Using offsetof on a non-POD class/struct
8) Using a map/set with a comparison function with no strict/weak
ordering for the key type
9) Accessing vector members that don't exist
10)Using a container iterator after it has become invalid
9) modifying a variable twice between sequence points (or accessing the
value being modified).
e.g. a = ++i + ++i; or a = i + ++i;
10) deleting a derived class through a pointer to a base class whose
destructor is not virtual.

Ci parliamo un po sopra o è inutile?
Imho, no

[Ziosilvio]

E che dire di:

calling fflush on an input stream

(Magari però questo è indefinito solo in C e non in C++... fatemi sapere...)

[Luc@s]

penso lo sia anche in C++(la parte ereditata dal C almeno)