C++ circular include

Question

I can\'t solve this circular dependency problem; always getting this error: \"invalid use of incomplete type struct GemsGame\" I don\'t know why the compiler doesn\'t know t

Answer 1

Two ways out:

1. Keep the dependent classes in the same H-file
2. Turn dependency into abstract interfaces: GemElement implementing IGemElement and expecting for IGemsGame, and GemsGame implementing IGemsGame and containing a vector of IGemElement pointers.