#include <stdio.h>

const int intsize = sizeof(int) * 8; /* # of bits for an integer value */

void bit_print(int v);

main()
{
  int i, n, lbit, rbit, lmask = 1 << (intsize - 1), rmask = 1;
  printf("\nInput an integer value: ");
  scanf("%d", &n);
  printf("\n Input value in binary: ");
  bit_print(n);
  for(i = 0; i < (intsize/2); ++i) {
    lbit = n & lmask;
    rbit = n & rmask;
    n = (lbit) ? (n | rmask) : (n & ~rmask);
    n = (rbit) ? (n | lmask) : (n & ~lmask);
    lmask = 1 << (intsize - i - 2); /* performs signed arithmetic shift */
    rmask <<= 1;
  }
  printf("\n Reversed binary value: ");
  bit_print(n);
}

void bit_print(int v)
{
  int i, mask = 1 << (intsize - 1); /* mask = 100 ... 0 */

  for(i = 1; i <= intsize; ++i) {
    putchar(((v & mask) == 0) ? '0' : '1');
    v <<= 1;
    if ((i % 8) == 0)
 	putchar(' ');
  }
  putchar('\n');
}