Question

This program needs to be written in C. Please use pointers.

Implement a function that reverses the bits of a decimal number represented with an unsigned char. For example: f (1) ! 128; In binary: f (00000001) ! 10000000 Your function must have the following properties:

(a) Name: ReverseBits

(b) Return type: unsigned char

(c) Input: unsigned char

Answer 1

#include <stdio.h>
unsigned char ReverseBits(unsigned char input);
int main()
{
unsigned char output=ReverseBits(1);
printf("%u",output);
return 0;
}

unsigned char ReverseBits(unsigned char input) {
input = (input & 0xF0) >> 4 | (input & 0x0F) << 4;
input = (input & 0xCC) >> 2 | (input & 0x33) << 2;
input = (input & 0xAA) >> 1 | (input & 0x55) << 1;
return input;
}