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
    uint8_t bit;
    uint32_t ans = 0;

    for(int i = 0; i <= 30; i+=2){

        bit = (reg >> i) & 1;
        ans |= (bit << i/2);
    }

    return ans;
}

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