adding multiple elements to c++ vector at once [duplicate]

Answer 1

In C++11 you can use vector's initializer-list constructor:

vector<A> list {a1, a2, a3, a4, a5};

If C++11 isn't available you can use the iterator based constructor if you create a temporary array, but it's not as clean as the C++11 solution:

A tmp_list[] = {a1, a2, a3, a4, a5};
vector<A> list(tmp_list, tmp_list + 5};