#include <stdio.h>
#include <stdlib.h>

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

	printf("I received the argument %s.\n", argv[1]);
	return EXIT_SUCCESS;
}