/*
 *  ======================================================================
 *  Demonstrate function calls by computing factorials.
 * 
 *  Copyright (C) 1994-96 by Mark Austin and David Mazzoni.
 *                                                                     
 *  This software is provided "as is" without express or implied warranty.
 *  Permission is granted to use this software on any computer system,
 *  and to redistribute it freely, subject to the following restrictions:
 * 
 *  1. The authors are not responsible for the consequences of use of
 *     this software, even if they arise from defects in the software.
 *  2. The origin of this software must not be misrepresented, either
 *     by explicit claim or by omission.
 *  3. Altered versions must be plainly marked as such, and must not
 *     be misrepresented as being the original software.
 *  4. This notice is to remain intact.
 * 
 *  Written By : D. Mazzoni and M. Austin                     January 1994  
 *  ======================================================================
 */

#include <stdio.h>                        /* Include i/o declarations  */

int main( void ) {               
unsigned long ulFact;                     /* Holds the factorial       */
int             iCnt;                     /* General purpose counter   */
unsigned long factorial(int iVal);        /* Function declaration      */
  
   for(iCnt = 1; iCnt <= 10; iCnt++) {
       ulFact = factorial(iCnt);
       printf( "Factorial(%2d) = %8lu\n", iCnt, ulFact );
   }
}

/*
 *  ===============================================
 *  Factorial () : Calculate the factorial of iVal.    
 *  ===============================================
 */

unsigned long factorial(int iVal) {
unsigned long ulFact = 1;
int iCnt;

  for(iCnt = 1; iCnt <= iVal; iCnt++)
      ulFact *= iCnt;

  return ulFact;
}