Branchless FizzBuzz

fizzbuzz.c

#include <stdio.h>

int main() {
    int i, idx, mask[] = {3, 0, 0, 0, 0};
    char buf[4], *out[] = {buf, "Fizz", "Buzz", "FizzBuzz"};

    for(i = 1; i <= 100; i++) {
        sprintf(buf, "%d", i);
        idx = (mask[i % 3] & 1) + (mask[i % 5] & 2);
        printf("%s\n", out[idx]);
    }

    return 0;
}