C++ - value of uninitialized vector

Question

I understand from the answer to this question that values of global/static uninitialized int will be 0. The answer to this one says that for vectors, the default construc

Answer 1

By default, vector elements are zero-initialized and not default-initialized. Those are two different but related concepts:

• zero-initialization is what is done for static objects not having an explicit initialization and what is done for a member given in the initialized list with an initializer of (). For basic types, the value used is 0 converted to the type.

• default-initialization is what is done for not explicitly initialized non static variables and members. For basic types it stay uninitialized.

(And C++0X introduces value-initialization which is still different).