object-slicing.cpp

#include <stdio.h>

class Person
{
  public:
    virtual void aboutMe() const {
      printf("I am a person.\n");
    }
};

class Student : public Person
{
  public:
    void aboutMe() const {
      printf("I am a student!\n");
    }
};


int main(int argc, char** argv)
{
  Student s;
  Person* p = new Student();

  s.aboutMe();
  ((Person)s).aboutMe();
  p->aboutMe();
  ((Person*)p)->aboutMe();

  return 0;
}

/**
[~] $ clang++ -Wall -Wextra -g -o out main.cpp && ./out
I am a student!
I am a person.
I am a student!
I am a student!
*/