For some C++ features, it is much easier to understand using sample code
virtual base class ( for multiple inheritance )
class A { public: A(int i); }
class B: virtual public A {}
class C: virtual public A {}
class D: public B, public C{ public: D(int i):B(i),C(i), A(i){} }
notes:
A’s constructor will be ignored in B,C in this case
D is responsible for constructing the virtual base class A
template specialization
template<typename T> void sort(Array<T>& v)
template<> void sort<int>(Array<int>& v) // template specialization
Template Partial Specialization
template<typename T1, typename T2, int I> class A { };
template<typename T1, typename T2, int I> class A<T1*, T2, I> { }; // Partial Specialization
friends
class A {
private: int a;
public:
friend class B; // Friend Class
friend void getA(A&); // global friend function
};
class B {
void func(A& x) { // B can access private members of A
cout<< x.a
}
};
void getA(A& x) {
// getA can access private members of A
cout << x.a;
}
