Re: STL vector Problem: push_back derived object but get base object
gph wrote:
Hello, I have a problem about STL vector. I expect vector can hold my
derived objects. But it doesn't.
Right. Since the values are actually copied, your derived object is copied
to a base object. You could use pointers (preferably smart pointers)
instead.
BTW: you should take the habit of always controlling copying and assignment
for your classes. In particular when you have derived classes with
different data and functions, copying and assignment between objects of
different types doesn't make any sense, so you should perhaps and this to
your baseclass' assignment operator and copy constructor:
assert(typeid(*this)==typeid(other));
Another approach is to make the according functions private and not
implement them, which makes them completely inaccessible.
Both of these would have helped you find that your program is doing
something wrong earlier.
Uli
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