C/Data Type/Bit Reverse

#include <stdio.h>
#include <conio.h>
int main(void)
{
  char ch;
  int i;
  ch = "d";
  /* display binary representation */
  for( i = 128; i > 0; i = i / 2)
    if(i & ch) 
        printf("1 ");
    else 
        printf("0 ");
  /* reverse bit pattern */
  ch = ~ch;
  printf("\n");
  /* display binary representation */
  for( i = 128; i > 0; i = i / 2 )
    if(i & ch) 
        printf("1 ");
    else 
        printf("0 ");
  return 0;
}