/*
	factorial.c
	Started by Jeff Ondich on 1/3/96
	Last modified 4/1/97

	This is the impementation of the one-function
	"factorial library."  The interface is specified in
	factorial.h.
*/

#include	"factorial.h"

/*
	factorial() returns N! if N >= 0 and N <= MAX_N,
	and 0 otherwise.
*/
int factorial( int N )
{
	int		i, product;

	if( N >= 0  &&  N <= MAX_N )
	{
		product = 1;
		for( i=2; i <= N; i++ )
			product = product * i;
	} else
		product = 0;
	
	return( product );
}