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 even= 0;
    for(uint8_t i=0;i<=15;i++)
    {
        if(reg & (1<<i*2))
        {
            even |=(1<<i);
        }
    }

    return even;
}

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