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();

			}

exsp4e/exercice_4/src/csv_writer.cc33d7a118f06bmaster