Passing vector by reference

Question

Using normal C arrays I\'d do something like that:

void do_something(int el, int **arr)
{
   *arr[0] = el;
   // do something else
}

Now, I

Answer 1

If you define your function to take argument of std::vector& arr and integer value, then you can use push_back inside that function:

void do_something(int el, std::vector& arr)
{
    arr.push_back(el);
    //....
}

usage:

std::vector arr;
do_something(1, arr);