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6. Heritage
The concept makes it possible to define a new "derived" class B from an existing "base" class A. To do this, proceed as follows:
class B : public A // or private A or protected A
{ // define additional members // (data or functions)
// or redefinition of existing members in A // (data or functions)
} ;
The process can be repeated at will: from B, we can very easily derive a new class C, from C a new class D, and so on.
6.1 Redefining a member function
The derived class can redefine a member function of the base class by providing a member function with...
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Virtual functions and polymorphism
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