To Reverse an array in C

#include <stdio.h>

int main()
{
   int n, c, d;
   int a[100], b[100];

   printf("Enter the number of elements in array\n");
   scanf("%d", &n);

   printf("Enter the array elements\n");

   for (c = 0; c < n ; c++)
      scanf("%d", &a[c]);

   /*
    * Copying elements into array b starting from end of array a
    */

   for (c = n - 1, d = 0; c >= 0; c--, d++)
      b[d] = a[c];

   /*
    * Copying reversed array into original.
    * Here we are modifying original array, this is optional.
    */

   for (c = 0; c < n; c++)
      a[c] = b[c];

   printf("Reverse array is\n");

   for (c = 0; c < n; c++)
      printf("%d\n", a[c]);
   return 0;
}