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 sum = 0;
    int track = 0;

    for(int i = 0; i <= 30; i += 2)
    {
        sum |= ((reg >> i) & 1) << track;
        track++;
    }

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