/* Fig. 5.15: fig05_15.c
   Recursive fibonacci function */
#include <stdio.h>
#include <stdlib.h>


long fibonacci( long n ); /* function prototype */

/* function main begins program execution */
int main()
{
   long result; /* fibonacci value */
   long number; /* number input by user */

   /* obtain integer from user */
   printf( "Enter an integer: " );
   scanf( "%ld", &number );

   /* calculate fibonacci value for number input by user */
   result = fibonacci( number );

   /* display result */
   printf( "Fibonacci( %ld ) = %ld\n", number, result );
   
   
printf("\n\n");
system("pause");
return 0; /* indicates successful termination */

} /* end main */

/* Recursive definition of function fibonacci */
long fibonacci( long n )
{
   /* base case */
   if ( n == 0 || n == 1 ) {
      return n;
   } /* end if */
   else { /* recursive step */ 
      return fibonacci( n - 1 ) + fibonacci( n - 2 );
   } /* end else */
   
} /* end function fibonacci */



/**************************************************************************
 * (C) Copyright 1992-2004 by Deitel & Associates, Inc. and               *
 * Pearson Education, Inc. All Rights Reserved.                           *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 *************************************************************************/
