#include <stdio.h>

int main(int argc, char *argv[])
{
/* check for proper number of arguments */
	if(argc == 1)
	{
		puts("This program requires you to type");
		puts("some text after the program name.");
		return(1);
	}
	if(argc > 2)
	{
		puts("This program requires only one option.");
		puts("The extra options will be ignored.");
	}

/* Program continues here */
	printf("I shall now work on the \"%s\" option.\n",argv[1]);
	return(0);
}