/*
 * bonus.c
 * FINAL
 * BY: John Stile
 * Purpose: Waht is the output generated by the program?
 *          Explain how you reached your answer.
 * What it does:
 *
 * First: I think you ment int main(void) or it won't compile.
 *        I had to add return 0 as well to make it compile.
 * Second: Initially x=6
 *         mystry recursively calls it self, 
 *         each time making x one less, until x=1,  
 *         z=6*5*4*3*2=720
 *         720 is returned to main, and assigned to y.
 */
#include <stdio.h> // include headers to functions in stdio library
#include <stdlib.h> // include headers to functions in stdlib library

int mystery(int); // prototype mystery: takes int, returns int

int main(void) // header for main, takes nothing, returns nothing
{
  int x=6; // declare and initialize int x = to 6
  int y; // declare int y  

  y=mystery(x); // call function mystry, passing value stored in x=6
                // and assign return value to y

  printf("y=%d", y); // print decimal value of y

  return 0;
}

int mystery(int x) // header for funciton mystery, assign value passed to 
                   // local variable x
{
  int z; // declare int z

  if( x==1 ) // if x contains 1, do block
  {
    return 1; // return 1  to calling function
  }
 
  z=mystery(x-1)*x; // subtract 1 from value in x
                    // NOTE: since this is never 1 expression will never evalutate to zero 
                    // call function....
  return z;
}