#include <iostream>
#include <stdexcept>

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

main: ( argc: int, argv: ->->char) int
	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 << "Error: " << e.what() << "\n";
	return 0;