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
    int even_bits = 0;
    while(reg)
    {
        even_bits <<= 1;
        if(reg & 0x00000001)
        {
            even_bits |= 0x1;

        }
        reg >>= 2;

    }

    return even_bits;
}

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