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 even_bits = 0;
    int i = 0;
    int k = 0;
    while(i < 32){
        even_bits |= ((reg >> i) & 1u) << k;
        i += 2;
        k++;
    }
    return even_bits;
}

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