Step 2: Create a "boid species" class, to store general data about different types of boids, and keep track of all the boids of each type.
The boidSpecies class provides a function to find all the neighbors of a particular boid. It uses the STL vector template for lists of boids.
This program shows the neighbors of one particular boid, by making the neighbor boids larger.
flock1.cpp
boid1.h
boid1.cpp
boidSpecies1.h
boidSpecies1.cpp