Classes and slicing in C++

README.md

Because I always forget this stuff, I'm putting it here.

Output of program:

cool
cool
cool
not cool

Because slicing ain't cool.

main.cpp

#include <iostream>

using namespace std;

class A {
  public:
    A() = default;
    virtual ~A() = default;
    virtual void Talk() const {
        cout << "not cool" << endl;
    }
};

class B : public A {
  public:
    B() = default;
    ~B() override = default;
    void Talk() const override {
        cout << "cool" << endl;
    }
};

int main()
{
    B thing;
    A* ptr = &thing;
    A& ref = thing;
    A slice = thing;
    thing.Talk();
    ptr->Talk();
    ref.Talk();
    slice.Talk();

    return 0;
}