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 bit_pos = 0;
    uint32_t bit_val = 0;
    uint32_t result = 0;
    while(reg)
    {
        bit_val = reg & 1;
        result = (result | bit_val << bit_pos);
        bit_pos++;
        reg >>= 2; 
    }
    return result;
}

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