/***************************************************************************
 *   Copyright (C) 2005 by Christian Bucher                                *
 *   christian.bucher@amadyne.net                                          *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/


#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

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

double fact_i(int nZahl);
double fact_r(int nZahl);

int main(int argc, char *argv[])
{
double dftFak;

  printf("Berechnung der Fakultaet von 100\n\n");
  
  //Iterativ
  dftFak = fact_i(100);
  printf("Iterativ: 100! = %e\n\n", dftFak);
  
  //rekursiv
  dftFak = fact_r(100);
  printf("Rekursiv: 100! = %e\n\n", dftFak);
  
  return 0;
}

//**********************************************************
// iterative Berechnung
double fact_i(int nZahl)
{
int    i;
double dftFak = 1.0;

  for (i = 1; i <= nZahl; i++)
    {
    dftFak *= (double)i; 
    }
    
  return dftFak;
}

//**********************************************************
// rekursive Berechnung
double fact_r(int nZahl)
{
  if (nZahl > 1)
    {
    return (double)nZahl * fact_r(nZahl-1);
    }
  else
    {
    return 1;
    } 
}

syntax highlighted by Code2HTML, v. 0.9.1