Adding pointers to vector in loop

Question

I am slightly confused about the following code

void foo() {

  std::list list;

  for (int i = 0; i < 3; i ++) {
    A a = A(i);
    list.push_         


        

Answer 1

If you'd like to worry less about remembering to de-allocate the allocated memory (and have a nicer less error prone code) you should use unique_ptr or shared_ptr (read about them and shoose whichever fits your needs best).

Here is a small example (notice how the elements in the vector get deleted when the vector goes out of scope):

cout<<"Scope begins"< > v;
    for (int i=0; i<5; ++i){
        v.push_back(unique_ptr(new A(i)) );
    }
}
cout<<"Scope ends"<

Live demo here.