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
    uint32_t val = 0;
    int j=0;
    for(int i=0; i<32; i++)
    {
        if(i%2==0)
        {
            if(reg & (1U<<i))
                val |= (1U<<j);

            j++;
        }
    }
    return val;
}

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