main.cc
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	#include "compute_gravity.hh"
	#include "compute_verlet_integration.hh"
	#include "csv_reader.hh"
	#include "csv_writer.hh"
	#include "my_types.hh"
	#include "ping_pong_balls_factory.hh"
	#include "planets_factory.hh"
	#include "system.hh"
	/* -------------------------------------------------------------------------- */
	#include <cstdlib>
	#include <iostream>
	#include <sstream>
	/* -------------------------------------------------------------------------- */

	int main(int argc, char** argv) {
	if (argc != 6) {
	std::cout << "Usage: " << argv[0]
	<< " nsteps dump_freq input.csv particle_type timestep"
	<< std::endl;
	std::cout << "\tparticle type can be: planet, ping_pong" << std::endl;
	std::exit(EXIT_FAILURE);
	}

	// Parse arguments into stringstream
	std::stringstream sstr;
	for (int i = 1; i < argc; ++i) {
	// std::cout << argv[i] << std::endl;
	sstr << argv[i] << " ";
	}

	// Set number of steps
	Real nsteps;
	sstr >> nsteps;
	// Set dumper frequency
	int freq;
	sstr >> freq;
	// Set filename
	std::string filename;
	sstr >> filename;
	std::cout << filename << std::endl;
	// Set particle's type
	std::string particle_type;
	sstr >> particle_type;
	// Set time step
	Real timestep;
	sstr >> timestep;

	// Init system obj
	System system;
	// Init reader obj
	CsvReader reader(filename);
	// Read from file
	reader.read(system);

	// Init writer obj
	std::string saveFile = "saveFile.txt";
	CsvWriter writer(saveFile);
	writer.write(system);

	return EXIT_SUCCESS;
	}