Casting vectors to void pointers

[madhavagarwal]

Hello ,

I want to cast STL vecyor to a void pointer....How do i go for it?

ex:

void *data;

vector<int>myvector;

Now i want data to hold all the values of vector....
Is it possible?If yes.....
Please help me....


Thanks in advance

[R0mai]

As in vector the stored data is guaranteed to be in one continuous block of memory, you can do this :
data = static_cast<void*>(& myvector[0])

[jsmith]

That works as long as sizeof( vector::value_type* ) == sizeof( void* ), which is not necessarily always the case
(though in most cases it is).

The real question is why do you want to do this in the first place?