Скачать или смотреть C++ Tutorial #50 : "Chained/Multiple" inheritance, (con/de)struction, mem layout

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Chained Inheritance: The 2nd-most simple example of inheritance. We look again at the memory layout of such an inheritance structure.

No surprises there; just the same as C.

After this, I touch on the subject of "Multiple inheritance" in which case A derives from two separate objects rather than gaining its 2nd inheritance "unintentionally" through B (in the example case). This leads to much more complex inheritance possibilities, most of which aught to be avoided.

In defense of multiple inheritance, there are several specific occasions when a single-level multiple inheritance structure is highly desirable (A : B,C). But generally, if B and C are inheriting from other (especially related) objects, then I strongly advise avoiding such schemes where possible, and instead simply declaring B and C objects as member variables of A. If it is not possible to alter the code in this way, then chances are that the real problem lies with the existing set of classes and not necessarily the particular class exhibiting this limitation.

Me