// Particles...

#if !defined(__PARTICLES_INCLUDED__)
#define __PARTICLES_INCLUDED__

#include <stdio.h>

#include "Vector.h"

// ------------------------------------------------------------

typedef struct { Vector r, p, F; 
                 double m; } Particle;

// ------------------------------------------------------------

Vector Velocity( Particle P );
Vector CenterOfMass( int N, Particle P[] );
double KineticEnergy( Particle P );
double TotalKineticEnergy( int N, Particle P[] );

void   PrintParticle( Particle P );

#endif