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 fin=0;
    int mask =1;
    for(int x = 0; x< 16; x++){
        if(reg & 1){
            fin |= mask;
            mask<<=1;
            reg>>=2;
        }
    }
    return fin;
    
}

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