how to create array of an abstract class in c++

Question

I am trying to create a program that takes food order and prints it out. I have my base class Food which has a pure virtual function in it. Class Food has 2 sub

Answer 1

You need reference semantics for that, because Food arr[2]; tries to initialize the array with default values (which are abstract, thus not constructible).

I think std::array, 2> arr; should be the most natural to use in this case.

std::array> arr = {
    std::make_unique("brownie"),
    std::make_unique("BBQ delux")
};

If you just want to loop over those two values, though, using initializer_list would be easiest, I suppose.

for (auto f : std::initializer_list{&d,&p})
    f->commonMemberFunction();

Unfortunately it won't deduce the correct type from just {}, but a helper could be created, I suppose,