In C++ Inheritance, Derived class destructor not called when pointer object to base class is pointed to derived class

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Your code has undefined behavior. The base class’s destructor must be virtual for the following to have defined behavior.

Base* b = new Derived;    
delete b;

From the C++ standard:

5.3.5 Delete

3 In the first alternative (delete object), if the static type of the
operand is different from its dynamic type, the static type shall be a base class of the operand’s dynamic type and the static type shall have a virtual destructor or the behavior is undefined.

So in your case, the static type is Base, and the dynamic type is Derived. So the Base‘s destructor should be:

virtual ~Base() {cout << "Base Destructor\n"; }

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