Standard C++ provides a “pointer-to-member” mechanism for classes:

Pointers to members are also permitted for subroutine members (methods), including virtual methods. How would you implement pointers to virtual methods in the presence of C++-style multiple inheritance?

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class C { public: int a; int b; } c; int C::*pm // pm points to member a of an (arbitrary)C object &C::a; C* P &c; %3D 3; // assign 3 into c.a p->*pm %3D