22. Extract Even Bits Only from 32-bit Register

#include <stdio.h>
#include <stdint.h>

uint32_t extract_even_bits(uint32_t reg) {
    int bit,j=0;
    uint32_t val=0;
    for(int i=0;i<32;i++){
        if(i%2==0){
            bit=(reg>>i)&1;
            val=val|(bit<<j);
            j++;
        }
    }
    return val;
}

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