friends, inheritance and forward declarationThanks, as far as I can see there were two problems: 1) expr.hpp does not need the definition of e...
friends, inheritance and forward declarationHello, I am trying to code the example given in "Ruminations on C++" Koenig, Moo, ยง8.3 but I don't...
inheritance and polymorphismHello, I have a general question about inheritance and polymorphism. To start right away, here is...
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