https://leetcode.com/problems/hamming-distance/description/

hamming.c

#include "stdio.h"

int hammingDistance(int x, int y) {
    int diff = x^y;
    int distance = 0;
    for (int i = 0; i < 32; ++i) {
        if ((diff & (1 << i)) != 0) {
            ++distance;
        }
    }
    return distance;
}

int main() {
    int dist = hammingDistance(0xFE, 0xFF);
    printf("distance = %d\n", dist);
}