22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    // Your code here
    uint32_t extracted_bits;
    for (int bit = 0, pos = 0; bit < 31; bit += 2, ++pos)
        extracted_bits |= ((reg >> bit) & 1U) << pos;

    return extracted_bits;
}

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