Re: [boost] How to get the size of an C-array?

15 Oct 2009

      vicente.botet wrote:
...
Hi,
On TBoost.STM, I need to do something before deleting an array on
each one of the elements of the array, or more precissely with the
address of each one of the elements.
T* ptr = new T[3];
// in another file, the number of elements to which ptr points is
unknown.
// before deleting
for (size_t i=0; i< 'ptr size'; ++i) {
    // do something with &ptr[i]
}
delete [] ptr;
As the number of elemenst is unknow in the separated unit, I have
no mean to iterate on ptr to get the address of the elements.
You just have to remember the size of the allocation.

const ptr_size = 3;
T* ptr = new T[ptr_size];

That's all there is to it!

Bo Persson