#include <iostream>  //for the object cerr
#include <cstdlib>   //for the macro EXIT_FAILURE
#include <cmath>     //for the function abs
#include "relativistic_rocket.h"
using namespace std;

const double relativistic_rocket::c {2.99792458e8};  //meters per second

relativistic_rocket::relativistic_rocket(double init_length, double init_v)
	: rocket {init_length, init_v}
{
	if (abs(v()) >= c) {
		cerr << "Velocity " << v() << " can't be >= the speed of light "
			<< c << ".\n";
		exit(EXIT_FAILURE);
	}
}