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 new_reg = 0;
    int pos =0;
    for(int i =0;i<32;i+=2){
        if(reg &  (1u<<i)){
           new_reg |= (1u<<pos);
        }
        pos++;
    }
    return new_reg;
}

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