#include <iostream>
#include <stdexcept>

namespace
	void	ShowUsage()
		std::cout << "Usage: no parameters accepted\n";
	

int	main( int argc, char** argv)
	try
		if ( argc!=1)
			ShowUsage();
		else
			std::cout << "Hellow world\n";
			throw std::runtime_error( "just testing...");
			return 0;
	catch( std::exception& e)
		std::cerr << "Received expected test: " << e.what() << "\n";
	return 0;