Answer Posted / abdur rab

You can swap swap bits using two ways
1 ) with for loop
2 ) using recursion

#include <stdio.h>

char swap_bits_in_byte ( unsigned char byte_2_swap )
{
unsigned char swapped_byte = 0;
int nloop = 0;
for( nloop = 0; nloop < 8; ++nloop ) {
swapped_byte = swapped_byte << 1;
swapped_byte |= ( byte_2_swap & 1 );
byte_2_swap = byte_2_swap >> 1;
}
return ( swapped_byte );
}


unsigned char swap_bits ( unsigned char byte_2_swap, int
n_size )
{
unsigned char swapped_byte = 0;
int bits = ( ( sizeof ( unsigned char ) * 8 ) - 1 );

if ( bits == n_size ) {
swapped_byte = ( byte_2_swap
& (unsigned char) ( pow (
2, n_size ) ) )
? ( 1 << ( bits - n_size ) ) : 0;
} else {
swapped_byte = swap_bits ( byte_2_swap,
n_size + 1 );
swapped_byte |= ( byte_2_swap
& (unsigned char) ( pow (
2, n_size ) ) )
? ( 1 << ( bits - n_size ) ) : 0;
}
return ( swapped_byte );
}

int main ( int argc, char* argv [] )
{
unsigned char byte = 128 | 32;
unsigned char swapped_byte = 0;

swapped_byte = swap_bits_in_byte ( byte );
printf ( "\n Un Swapped Byte :%d", byte );
printf ( "\n Swapped Byte :%d", swapped_byte );

swapped_byte = swap_bits ( byte, 0 );
printf ( "\n Un Swapped Byte :%d", byte );
printf ( "\n Swapped Byte :%d", swapped_byte );

}

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