Memset on vector C++

Question

Is there any equivalent function of memset for vectors in C++ ?

(Not clear() or erase() method, I want to retain the size of v

Answer 1

Another way, I think I saw it first in Meyers book:

// Swaps with a temporary.
vec.swap( std::vector(vec.size(), 0) );

Its only drawback is that it makes a copy.