simple example of using vectors to hold references to subclasses

Boid

class Boid {  
};  
  
class First : public Boid {  
};  
  
class Second : public Boid {  
}  
  

testApp

//testApp

vector<Boid*> boids;

........
  
Boid boids;  
First first;  
Second second;  
  
boids.push_back(&boids);  
boids.push_back(&first);  
boids.push_back(&second);