#include <iostream>
#include <cstdlib>

int main(int argc, char **argv)   //char *argv[] would mean the same thing
{
	if (argc != 2) {
		std::cerr << argv[0];
		std::cerr << ": requires 1 command line argument\n";
		return EXIT_FAILURE;
	}

	std::cout << "I received the argument ";
	std::cout << argv[1];
	std::cout << ".\n";

	return EXIT_SUCCESS;
}