22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
   uint16_t result=0;
   int n=0;
    // Your code here
    for(int i=0;i<32;i++){
        if (((i%2)==0) || (i==0)){
            if ((reg & (1<<i))==0) result &= ~(1<<n);
            else result |=(1<<n);
            n+=1; 
        }
    }
    return result;
}

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