C++ stack variables and heap variables

Question

When you create a new object in C++ that lives on the stack, (the way I\'ve mostly seen it) you do this:

CDPlayer player;

When you create a

Answer 1

When you create a new object in C++ that lives on the stack, (…) you do this:

CDPlayer player;

Not necessarily on the stack: variables declared in this way have automatic storage. Where they actually go depends. It may be on the stack (in particular when the declaration is inside a method) but it may also be somewhere else.

Consider the case where the declaration is inside a class:

class foo {
    int x;
};

Now the storage of x is where ever the class instance is stored. If it’s stored on the heap, then so is x:

foo* pf = new foo(); // pf.x lives on the heap.
foo f; // f.x lives where f lives, which has (once again) automatic storage.