Destructing derived class by deleting base class

Question

I have a situation that looks like the following code:

#include 

class A
{
public:
    A() { std::cout << \"A created!\" << std::end         


        

Answer 1

As a rule of thumb, if any of your methods are virtual, the destructor must also be virtual. If it isn't, the declared type of a variable decides which destructor gets called, which is almost never what you want. 99.9% of all cases, you want the destructor from the runtime type.