/*********************************************************
 * From C PROGRAMMING: A MODERN APPROACH, Second Edition *
 * By K. N. King                                         *
 * Copyright (c) 2008, 1996 W. W. Norton & Company, Inc. *
 * All rights reserved.                                  *
 * This program may be freely distributed for class use, *
 * provided that this copyright notice is retained.      *
 *********************************************************/

/* reverse2.c (Chapter 8, page 174) */
/* Reverses a series of numbers using a variable-length
   array - C99 only */

#include <stdio.h>

int main(void)
{
  int i, n;

printf("Reverses a series of numbers using a variable-length array - C99 only");

  printf("\nHow many numbers do you want to reverse? ");
  scanf("%d", &n);

  int a[n];   /* C99 only - length of array depends on n */

  printf("Enter %d numbers: ", n);

  /* The following code fragment is similar to the slides.
  for (i = 0; i < n; i++)
    scanf("%d", &a[i]);
  */

  /* Since a is the address of the 0-th element of the array, (a+i) is the 
	address of the (i-1)th element of the array. Therefore, the following
	code fragment works similar to code that we commented out above. */

  for (i = 0; i < n; i++)
    scanf("%d", (a + i));

  printf("In reverse order:");
  for (i = n - 1; i >= 0; i--)
    printf(" %d", a[i]);
  printf("\n");

  return 0;
}