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 output = 0;
    uint32_t pos = 0;
    for(int i = 0; i< 32; i+=2)
    {
        if((reg >> i) & 1U)
        {
            output |= (1<<pos);
            pos++;
        }
    }
    return output;
}

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