Code# 52:C Program To Reverse Array Using Pointers

#include<stdio.h>
#include<stdlib.h>

void reverse_array(int*, int);

main()
{
   int n, c, *pointer;

   scanf("%d",&n);

   pointer = (int*)malloc(sizeof(int)*n);

   if( pointer == NULL )
      exit(EXIT_FAILURE);

   for ( c = 0 ; c < n ; c++ )
      scanf("%d",(pointer+c));

   reverse_array(pointer, n);

   printf("Original array on reversal is\n");

   for ( c = 0 ; c < n ; c++ )
      printf("%d\n",*(pointer+c));

   free(pointer);

   return 0;
}

void reverse_array(int *pointer, int n)
{
   int *s, c, d;

   s = (int*)malloc(sizeof(int)*n);

   if( s == NULL )
      exit(EXIT_FAILURE);

   for ( c = n - 1, d = 0 ; c >= 0 ; c--, d++ )
      *(s+d) = *(pointer+c);

   for ( c = 0 ; c < n ; c++ )
      *(pointer+c) = *(s+c);

   free(s);
}