22. Extract Even Bits Only from 32-bit Register

#include <stdio.h>
#include <stdint.h>

uint32_t extract_even_bits(uint32_t reg) {
    
    uint32_t out = 0;

    for (int pos = 0; pos <= 30; pos += 2) { // Loops through even reg positions
        out |= (((reg >> pos) & 1u) << (pos / 2)); // extracts value and sets in out reg
    }
    return out;
}

int main() {
    uint32_t reg;
    scanf("%u", &reg);
    printf("%u", extract_even_bits(reg));
    return 0;
}