Particle.h

class Particle{
private:
    double x, y, xSpeed, ySpeed, mass;
public:
    Particle(double x, double y, double mass);
    double getX();
    void setX(double x);
    double getY();
    void setY(double y);
    double getxSpeed();
    void setxSpeed(double xSpeed);
    double getySpeed();
    void setySpeed(double ySpeed);
    double getMass();
    void setMass(double mass);
    void countAcceleration(double xAcceleration, double yAcceleration, double interval);
    void inverseDirection();
    void move(double interval);
};