csv_writer.cc
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	#include "csv_writer.hh"
	#include <cstdlib>
	#include <fstream>
	/* -------------------------------------------------------------------------- */
	CsvWriter::CsvWriter(const std::string& filename) : filename(filename) {}

	/* -------------------------------------------------------------------------- */
	void CsvWriter::write(System& system) { this->compute(system); }

	/* -------------------------------------------------------------------------- */

	void CsvWriter::compute(System& system) {

	std::ofstream os(filename.c_str());

	if (os.is_open() == false) {
	std::cerr << "cannot open file " << filename << std::endl
	<< "check that the dumps folder exists" << std::endl;
	std::exit(1);
	}

	UInt nb_particles = system.getNbParticles();

	for (UInt p = 0; p < nb_particles; ++p) {
	os << system.getParticle(p) << std::endl;
	}

	os.close();

	}