22. Extract Even Bits Only from 32-bit Register

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

uint32_t extract_even_bits(uint32_t reg) {
    uint32_t result_reg = 0;
    int pos = 0;

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

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